12583 + Mcqs in Physics Page 132 McqOptions

6551.	Water flows through a frictionless duct with a cross-section varying as shown in fig. Pressure p at points along the axis is represented by
A.
B.
C.
D.
Answer» B.

Discussion

6552.	Which of the following graphs shows the variation of electric field E due to a hollow spherical conductor of radius R as a function of distance from the centre of the sphere [AMU 2001]
A.
B.
C.
D.
Answer» B.

Discussion

6553.	Six moles of an ideal gas perfomrs a cycle shown in figure. If the temperature are TA = 600 K, TB = 800 K, TC = 2200 K and TD = 1200 K, the work done per cycle is [BCECE 2005]
A.	20 kJ
B.	30 kJ
C.	40 kJ
D.	60 kJ
Answer» D. 60 kJ

Discussion

6554.	From the figure describing photoelectric effect we may infer correctly that [KCET 2005]
A.	Na and Al both have the same threshold frequency
B.	Maximum kinetic energy for both the metals depend linearly on the frequency
C.	The stopping potentials are different for Na and Al for the same change in frequency
D.	Al is a better photo sensitive material than Na
Answer» C. The stopping potentials are different for Na and Al for the same change in frequency

Discussion

6555.	The slope of frequency of incident light and stopping potential graph for a given surface will be [MP PET 1999; MP PMT 2000; JIPMER 2001, 02; UPSEAT 2003]
A.	h
B.	h/e
C.	eh
D.	e
Answer» C. eh

Discussion

6556.	Consider a process shown in the figure. During this process the work done by the system
A.	Continuously increases
B.	Continuously decreases
C.	First increases, then decreases
D.	First decreases, then increases
Answer» B. Continuously decreases

Discussion

6557.	The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from \[A\to B\to C\]is 30J and 40J heat is given to the system. The change in internal energy between A and C is [BCECE 2005]
A.	10 J
B.	70 J
C.	84 J
D.	134 J
Answer» B. 70 J

Discussion

6558.	An ideal gas is taken from point A to the point B, as shown in the P-V diagram, keeping the temperature constant. The work done in the process is [UPSEAT 2005]
A.	\[({{P}_{A}}-{{P}_{B}})({{V}_{B}}-{{V}_{A}})\]
B.	\[\frac{1}{2}({{P}_{B}}-{{P}_{A}})({{V}_{B}}+{{V}_{A}})\]
C.	\[\frac{1}{2}({{P}_{B}}-{{P}_{A}})({{V}_{B}}-{{V}_{A}})\]
D.	\[\frac{1}{2}({{P}_{B}}+{{P}_{A}})({{V}_{B}}-{{V}_{A}})\]
Answer» E.

Discussion

6559.	In a parabola spectrograph, the velocities of four positive ions P,Q,R and S are v1, v2, v3 and v4 respectively
A.	\[{{v}_{1}}>{{v}_{2}}>{{v}_{3}}>{{v}_{4}}\]
B.	\[{{v}_{1}}<{{v}_{2}}<{{v}_{3}}<{{v}_{4}}\]
C.	\[{{v}_{1}}={{v}_{2}}={{v}_{3}}={{v}_{4}}\]
D.	\[{{v}_{1}}<<{{v}_{2}}>{{v}_{3}}<{{v}_{4}}\]
Answer» B. \[{{v}_{1}}<{{v}_{2}}<{{v}_{3}}<{{v}_{4}}\]

Discussion

6560.	An ideal gas is taken around ABCA as shown in the above P-V diagram. The work done during a cycle is [UPSEAT 2001]
A.	Zero
B.	\[\frac{1}{2}PV\]
C.	2 PV
D.	PV
Answer» E.

Discussion

6561.	The maximum value of stopping potential in the following diagram is
A.	? 4V
B.	? 1V
C.	? 3V
D.	? 2V
Answer» B. ? 1V

Discussion

6562.	For one complete cycle of a thermodynamic process on a gas as shown in the P-V diagram, Which of following is correct [AMU (Engg.) 2000]
A.	\[\Delta {{E}_{\operatorname{int}}}=0,\,Q<O\]
B.	\[\Delta {{E}_{\operatorname{int}}}=0,\,Q>0\]
C.	\[\Delta \,{{E}_{\operatorname{int}}}>0,\,Q<0\]
D.	\[\Delta \,{{E}_{\operatorname{int}}}<0,\,Q>\,0\]
Answer» B. \[\Delta {{E}_{\operatorname{int}}}=0,\,Q>0\]

Discussion

6563.	In the diagram a graph between the intensity of X-rays emitted by a molybdenum target and the wavelength is shown, when electrons of 30 keV are incident on the target. In the graph one peak is of \[{{K}_{\alpha }}\] line and the other peak is of \[{{K}_{\beta }}\] line
A.	First peak is of \[{{K}_{\alpha }}\] line at 0.6 Å
B.	Highest peak is of Ka line at 0.7 Å
C.	If the energy of incident particles is increased, then the peaks will shift towards left
D.	If the energy of incident particles is increased, then the peaks will shift towards right
Answer» C. If the energy of incident particles is increased, then the peaks will shift towards left

Discussion

6564.	When a system is taken from state i to a state f along path iaf, \[Q=50\,J\] and \[W=20J.\] Along path ibf, \[Q=35J.\] If \[W=-13J\] for the curved return path f i, Q for this path is [AMU (Med.) 2000]
A.	33 J
B.	23 J
C.	? 7 J
D.	? 43 J
Answer» E.

Discussion

6565.	The graph between the square root of the frequency of a specific line of characteristic spectrum of X-rays and the atomic number of the target will be
A.
B.
C.
D.
Answer» C.

Discussion

6566.	A sample of ideal monoatomic gas is taken round the cycle ABCA as shown in the figure. The work done during the cycle is [BHU 1994; KCET 2003]
A.	Zero
B.	3 PV
C.	6 PV
D.	9PV
Answer» C. 6 PV

Discussion

6567.	Carbon monoxide is carried around a closed cycle abc in which bc is an isothermal process as shown in the figure. The gas absorbs 7000 J of heat as its temperature increases from 300 K to 1000 K in going from a to b. The quantity of heat rejected by the gas during the process ca is [SCRA 1994]
A.	4200 J
B.	5000 J
C.	9000 J
D.	9800 J
Answer» E.

Discussion

6568.	The \[\upsilon -t\] plot of a moving object is shown in the figure. The average velocity of the object during the first 10 seconds is
A.	0
B.	\[2.5m{{s}^{1}}\]
C.	\[5m{{s}^{1}}\]
D.	\[2m{{s}^{1}}\]
Answer» B. \[2.5m{{s}^{1}}\]

Discussion

6569.	A system changes from the state \[({{P}_{1}},\ {{V}_{1}})\] to \[({{P}_{2}}{{V}_{2}})\] as shown in the figure. What is the work done by the system [CPMT 1981]
A.	\[7.5\times {{10}^{5}}\ joule\]
B.	\[7.5\times {{10}^{5}}\ erg\]
C.	\[12\times {{10}^{5}}\ joule\]
D.	\[6\times {{10}^{5}}\ joule\]
Answer» D. \[6\times {{10}^{5}}\ joule\]

Discussion

6570.	In the above graph, point B indicates
A.	Breaking point
B.	Limiting point
C.	Yield point
D.	None of the above
Answer» D. None of the above

Discussion

6571.	The force-time (F ? t) curve of a particle executing linear motion is as shown in the figure. The momentum acquired by the particle in time interval from zero to 8 second will be [CPMT 1989]
A.	? 2 N-s
B.	+ 4 N-s
C.	6 N-s
D.	Zero
Answer» E.

Discussion

6572.	A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the ball during its flight (air resistance is neglected) [CPMT 1993; AMU (Engg.) 2000] (A) (B) (C) (d)
A.	A
B.	B
C.	C
D.	D
Answer» E.

Discussion

6573.	Binding energy per nucleon plot against the mass number for stable nuclei is shown in the figure. Which curve is correct [Orissa JEE 2002]
A.	A
B.	B
C.	C
D.	D
Answer» D. D

Discussion

6574.	The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let \[{{I}_{a}},\ {{I}_{b}}\]and \[{{I}_{c}}\] be the intensities and \[{{f}_{a}},\ {{f}_{b}}\] and \[{{f}_{c}}\] be the frequencies for the curves a, b and c respectively [IIT-JEE (Screening) 2004]
A.	\[{{f}_{a}}={{f}_{b}}\] and \[{{l}_{a}}\ne {{l}_{b}}\]
B.	\[{{f}_{a}}={{f}_{c}}\] and \[{{l}_{a}}={{l}_{c}}\]
C.	\[{{f}_{a}}={{f}_{b}}\] and \[{{l}_{a}}={{l}_{b}}\]
D.	\[{{f}_{a}}={{f}_{b}}\] and \[{{l}_{a}}={{l}_{b}}\]
Answer» B. \[{{f}_{a}}={{f}_{c}}\] and \[{{l}_{a}}={{l}_{c}}\]

Discussion

6575.	The figure shows variation of R, XL and XC with frequency f in a series L, C, R circuit. Then for what frequency point, the circuit is inductive
A.	A
B.	B
C.	C
D.	All points
Answer» D. All points

Discussion

6576.	The current through a 4.6 H inductor is shown in the following graph. The induced emf during the time interval t = 5 milli-sec to 6 milli-sec will be
A.	\[{{10}^{3}}\,V\]
B.	\[-23\times {{10}^{3}}\,V\]
C.	\[23\times {{10}^{3}}\,V\]
D.	\[Zero\]
Answer» D. \[Zero\]

Discussion

6577.	Two long parallel wires are at a distance 2d apart. They carry steady equal currents flowing out of the plane of the paper, as shown. The variation of the magnetic field B along the line XX? is given by [IIT-JEE (Screening) 2000]
A.
B.
C.
D.
Answer» C.

Discussion

6578.	The graph shows the variation of displacement of a particle executing S.H.M. with time. We infer from this graph that
A.	The force is zero at time \[3T/4\]
B.	The velocity is maximum at time \[T/2\]
C.	The acceleration is maximum at time T
D.	The P.E. is equal to total energy at time \[T/2\]
Answer» E.

Discussion

6579.	The adjoining diagram shows the spectral energy density distribution \[{{E}_{\lambda }}\]of a black body at two different temperatures. If the areas under the curves are in the ratio 16 : 1, the value of temperature T is [DCE 1999]
A.	32,000 K
B.	16,000 K
C.	8,000 K
D.	4,000 K
Answer» E.

Discussion

6580.	An ideal gas is taken around ABCA as shown in the above P-V diagram. The work done during a cycle is [KCET 2001]
A.	2PV
B.	PV
C.	1/2PV
D.	Zero
Answer» B. PV

Discussion

6581.	A block of ice at ?10°C is slowly heated and converted to steam at 100°C. Which of the following curves represents the phenomenon qualitatively [IIT-JEE (Screening) 2000]
A.
B.
C.
D.
Answer» B.

Discussion

6582.	The voltage V and current I graph for a conductor at two different temperatures \[{{T}_{1}}\] and \[{{T}_{2}}\] are shown in the figure. The relation between \[{{T}_{1}}\] and \[{{T}_{2}}\] is [MP PET 1996; KCET 2002]
A.	\[{{T}_{1}}>{{T}_{2}}\]
B.	\[{{T}_{1}}\approx {{T}_{2}}\]
C.	\[{{T}_{1}}={{T}_{2}}\]
D.	\[{{T}_{1}}<{{T}_{2}}\]
Answer» B. \[{{T}_{1}}\approx {{T}_{2}}\]

Discussion

6583.	The figure gives the electric potential V as a function of distance through five regions on \[x\]-axis. Which of the following is true for the electric field E in these regions [AMU 2000]
A.	\[{{E}_{1}}>{{E}_{2}}>{{E}_{3}}>{{E}_{4}}>{{E}_{5}}\]
B.	\[{{E}_{1}}={{E}_{3}}={{E}_{5}}\] and \[{{E}_{2}}<{{E}_{4}}\]
C.	\[{{E}_{2}}={{E}_{4}}={{E}_{5}}\] and \[{{E}_{1}}<{{E}_{3}}\]
D.	\[{{E}_{1}}<{{E}_{2}}<{{E}_{3}}<{{E}_{4}}<{{E}_{5}}\]
Answer» C. \[{{E}_{2}}={{E}_{4}}={{E}_{5}}\] and \[{{E}_{1}}<{{E}_{3}}\]

Discussion

6584.	In the figure four plate characteristics of a triode at different grid voltage are shown. The difference between successive grid voltage is 1 V. Which curve will have maximum grid voltage and what is its value?
A.	A, Vg = + 4 V
B.	B, Vg = + 4 V
C.	A, Vg = 0
D.	D, Vg = 0
Answer» E.

Discussion

6585.	The curves (a), (b), (c) and (d) show the variation between the applied potential difference (V) and the photoelectric current (i), at two different intensities of light (I1 > I2). In which figure is the correct variation shown
A.
B.
C.
D.
Answer» C.

Discussion

6586.	An ideal monoatomic gas is taken round the cycle ABCDA as shown in following P-V diagram. The work done during the cycle is [IIT 1983; CPMT 1990; AMU 1995]
A.	PV
B.	2 PV
C.	4 PV
D.	Zero
Answer» D. Zero

Discussion

6587.	Which of the following figures correctly shows the phase relation between the input signal and the output signal of triode amplifier
A.
B.
C.
D.
Answer» B.

Discussion

6588.	The P-V graph of an ideal gas cycle is shown here as below. The adiabatic process is described by [CPMT 1985; UPSEAT 2003]
A.	AB and BC
B.	AB and CD
C.	BC and DA
D.	BC and CD
Answer» D. BC and CD

Discussion

6589.	The relationship between the force F and position x of a body is as shown in figure. The work done in displacing the body from x = 1 m to x = 5 m will be [KCET 2005]
A.	30 J
B.	15 J
C.	25 J
D.	20 J
Answer» C. 25 J

Discussion

6590.	The output current versus time curve of a rectifier is shown in the figure. The average value of the output current in this case is [AIIMS 1982]
A.	0
B.	i0/p
C.	2i0/p
D.	\[{{i}_{0}}\]
Answer» D. \[{{i}_{0}}\]

Discussion

6591.	The variation of wavelength \[\lambda \] of the \[{{K}_{\alpha }}\] line with atomic number Z of the target is shown by the following curve of
A.	A
B.	B
C.	C
D.	None of these
Answer» D. None of these

Discussion

6592.	A thermodynamic system undergoes cyclic process ABCDA as shown in figure. The work done by the system is
A.	\[{{P}_{0}}{{V}_{0}}\]
B.	\[2{{P}_{0}}{{V}_{0}}\]
C.	\[\frac{{{P}_{0}}{{V}_{0}}}{2}\]
D.	Zero
Answer» E.

Discussion

6593.	For the diode, the characteristic curves are given at different temperature. The relation between the temperatures is [RPET 1990]
A.	\[{{T}_{1}}={{T}_{2}}={{T}_{3}}\]
B.	\[{{T}_{1}}<{{T}_{2}}<{{T}_{3}}\]
C.	\[{{T}_{1}}>{{T}_{2}}>{{T}_{3}}\]
D.	None of the above
Answer» C. \[{{T}_{1}}>{{T}_{2}}>{{T}_{3}}\]

Discussion

6594.	The dependence of the short wavelength limit \[{{\lambda }_{\min }}\] on the accelerating potential V is represented by the curve of figure
A.	A
B.	B
C.	C
D.	None of these
Answer» B. B

Discussion

6595.	A system is taken through a cyclic process represented by a circle as shown. The heat absorbed by the system is
A.	\[\pi \times {{10}^{3}}J\]
B.	\[\frac{\pi }{2}J\]
C.	\[4\pi \times {{10}^{2}}J\]
D.	\[\pi \,J\]
Answer» C. \[4\pi \times {{10}^{2}}J\]

Discussion

6596.	The continuous x-ray spectrum obtained from a Coolidge tube is of the form
A.
B.
C.
D.
Answer» B.

Discussion

6597.	In the diagrams (i) to (iv) of variation of volume with changing pressure is shown. A gas is taken along the path ABCD. The change in internal energy of the gas will be [CPMT 1986, 88]
A.	Positive in all cases (i) to (iv)
B.	Positive in cases (i), (ii) and (iii) but zero in (iv) case
C.	Negative in cases (i), (ii) and (iii) but zero in (iv) case
D.	Zero in all four cases
Answer» E.

Discussion

6598.	The correct graph between the maximum energy of a photoelectron and the inverse of wavelength of the incident radiation is given by the curve
A.	A
B.	B
C.	C
D.	None of the above
Answer» B. B

Discussion

6599.	A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown in the PV diagram. The net work done during the complete cycle is given by the area [CBSE PMT 1992]
A.	P1ACBP2P1
B.	ACBB'A'A
C.	ACBDA
D.	ADBB'A'A
Answer» D. ADBB'A'A

Discussion

6600.	The frequency response curve of RC coupled amplifier is shown in figure. The band width of the amplifier will be
A.	\[{{f}_{3}}-{{f}_{2}}\]
B.	\[{{f}_{4}}-{{f}_{1}}\]
C.	\[\frac{{{f}_{4}}-{{f}_{2}}}{2}\]
D.	\[{{f}_{3}}-{{f}_{1}}\]
Answer» C. \[\frac{{{f}_{4}}-{{f}_{2}}}{2}\]

Discussion

Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

Water flows through a frictionless duct with a cross-section varying as shown in fig. Pressure p at points along the axis is represented by

Which of the following graphs shows the variation of electric field E due to a hollow spherical conductor of radius R as a function of distance from the centre of the sphere [AMU 2001]

Six moles of an ideal gas perfomrs a cycle shown in figure. If the temperature are TA = 600 K, TB = 800 K, TC­ = 2200 K and TD = 1200 K, the work done per cycle is [BCECE 2005]

From the figure describing photoelectric effect we may infer correctly that [KCET 2005]

The slope of frequency of incident light and stopping potential graph for a given surface will be [MP PET 1999; MP PMT 2000; JIPMER 2001, 02; UPSEAT 2003]

Consider a process shown in the figure. During this process the work done by the system

The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from \[A\to B\to C\]is 30J and 40J heat is given to the system. The change in internal energy between A and C is [BCECE 2005]

An ideal gas is taken from point A to the point B, as shown in the P-V diagram, keeping the temperature constant. The work done in the process is [UPSEAT 2005]

In a parabola spectrograph, the velocities of four positive ions P,Q,R and S are v1, v2, v3 and v4 respectively

An ideal gas is taken around ABCA as shown in the above P-V diagram. The work done during a cycle is [UPSEAT 2001]

The maximum value of stopping potential in the following diagram is

For one complete cycle of a thermodynamic process on a gas as shown in the P-V diagram, Which of following is correct [AMU (Engg.) 2000]

In the diagram a graph between the intensity of X-rays emitted by a molybdenum target and the wavelength is shown, when electrons of 30 keV are incident on the target. In the graph one peak is of \[{{K}_{\alpha }}\] line and the other peak is of \[{{K}_{\beta }}\] line

When a system is taken from state i to a state f along path iaf, \[Q=50\,J\] and \[W=20J.\] Along path ibf, \[Q=35J.\] If \[W=-13J\] for the curved return path f i, Q for this path is [AMU (Med.) 2000]

The graph between the square root of the frequency of a specific line of characteristic spectrum of X-rays and the atomic number of the target will be

A sample of ideal monoatomic gas is taken round the cycle ABCA as shown in the figure. The work done during the cycle is [BHU 1994; KCET 2003]

Carbon monoxide is carried around a closed cycle abc in which bc is an isothermal process as shown in the figure. The gas absorbs 7000 J of heat as its temperature increases from 300 K to 1000 K in going from a to b. The quantity of heat rejected by the gas during the process ca is [SCRA 1994]

The \[\upsilon -t\] plot of a moving object is shown in the figure. The average velocity of the object during the first 10 seconds is

A system changes from the state \[({{P}_{1}},\ {{V}_{1}})\] to \[({{P}_{2}}{{V}_{2}})\] as shown in the figure. What is the work done by the system [CPMT 1981]

In the above graph, point B indicates

The force-time (F ? t) curve of a particle executing linear motion is as shown in the figure. The momentum acquired by the particle in time interval from zero to 8 second will be [CPMT 1989]

A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the ball during its flight (air resistance is neglected) [CPMT 1993; AMU (Engg.) 2000] (A) (B) (C) (d)

Binding energy per nucleon plot against the mass number for stable nuclei is shown in the figure. Which curve is correct [Orissa JEE 2002]

The figure shows variation of R, XL and XC with frequency f in a series L, C, R circuit. Then for what frequency point, the circuit is inductive

The current through a 4.6 H inductor is shown in the following graph. The induced emf during the time interval t = 5 milli-sec to 6 milli-sec will be

Two long parallel wires are at a distance 2d apart. They carry steady equal currents flowing out of the plane of the paper, as shown. The variation of the magnetic field B along the line XX? is given by [IIT-JEE (Screening) 2000]

The graph shows the variation of displacement of a particle executing S.H.M. with time. We infer from this graph that

The adjoining diagram shows the spectral energy density distribution \[{{E}_{\lambda }}\]of a black body at two different temperatures. If the areas under the curves are in the ratio 16 : 1, the value of temperature T is [DCE 1999]

An ideal gas is taken around ABCA as shown in the above P-V diagram. The work done during a cycle is [KCET 2001]

A block of ice at ?10°C is slowly heated and converted to steam at 100°C. Which of the following curves represents the phenomenon qualitatively [IIT-JEE (Screening) 2000]

The voltage V and current I graph for a conductor at two different temperatures \[{{T}_{1}}\] and \[{{T}_{2}}\] are shown in the figure. The relation between \[{{T}_{1}}\] and \[{{T}_{2}}\] is [MP PET 1996; KCET 2002]

The figure gives the electric potential V as a function of distance through five regions on \[x\]-axis. Which of the following is true for the electric field E in these regions [AMU 2000]

In the figure four plate characteristics of a triode at different grid voltage are shown. The difference between successive grid voltage is 1 V. Which curve will have maximum grid voltage and what is its value?

The curves (a), (b), (c) and (d) show the variation between the applied potential difference (V) and the photoelectric current (i), at two different intensities of light (I1 > I2). In which figure is the correct variation shown

An ideal monoatomic gas is taken round the cycle ABCDA as shown in following P-V diagram. The work done during the cycle is [IIT 1983; CPMT 1990; AMU 1995]

Which of the following figures correctly shows the phase relation between the input signal and the output signal of triode amplifier

The P-V graph of an ideal gas cycle is shown here as below. The adiabatic process is described by [CPMT 1985; UPSEAT 2003]

The relationship between the force F and position x of a body is as shown in figure. The work done in displacing the body from x = 1 m to x = 5 m will be [KCET 2005]

The output current versus time curve of a rectifier is shown in the figure. The average value of the output current in this case is [AIIMS 1982]

The variation of wavelength \[\lambda \] of the \[{{K}_{\alpha }}\] line with atomic number Z of the target is shown by the following curve of

A thermodynamic system undergoes cyclic process ABCDA as shown in figure. The work done by the system is

For the diode, the characteristic curves are given at different temperature. The relation between the temperatures is [RPET 1990]

The dependence of the short wavelength limit \[{{\lambda }_{\min }}\] on the accelerating potential V is represented by the curve of figure

A system is taken through a cyclic process represented by a circle as shown. The heat absorbed by the system is

The continuous x-ray spectrum obtained from a Coolidge tube is of the form

In the diagrams (i) to (iv) of variation of volume with changing pressure is shown. A gas is taken along the path ABCD. The change in internal energy of the gas will be [CPMT 1986, 88]

The correct graph between the maximum energy of a photoelectron and the inverse of wavelength of the incident radiation is given by the curve

A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown in the PV diagram. The net work done during the complete cycle is given by the area [CBSE PMT 1992]

The frequency response curve of RC coupled amplifier is shown in figure. The band width of the amplifier will be

Six moles of an ideal gas perfomrs a cycle shown in figure. If the temperature are TA = 600 K, TB = 800 K, TC = 2200 K and TD = 1200 K, the work done per cycle is [BCECE 2005]