12583 + Mcqs in Physics Page 133 McqOptions

6601.	Heat energy absorbed by a system in going through a cyclic process shown in figure is [AIIMS 1995; BHU 2002]
A.	107 p J
B.	104 p J
C.	102p J
D.	\[{{10}^{-3}}\,\pi J\]
Answer» D. \[{{10}^{-3}}\,\pi J\]

Discussion

6602.	The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with the above spring of half length, the line OA will
A.	Shift towards F-axis
B.	Shift towards X-axis
C.	Remain as it is
D.	Become double in length
Answer» B. Shift towards X-axis

Discussion

6603.	The ratio of thermionic currents (I/I0) for a metal when the temperature is slowly increased \[{{T}_{0}}\] to \[T\] as shown in figure. (I and I0 are currents at T and respectively). Then which one is correct? [Orissa JEE 2002]
A.	A
B.	B
C.	C
D.	D
Answer» B. B

Discussion

6604.	An ideal gas is taken around the cycle ABCA as shown in the P-V diagram. The net work done by the gas during the cycle is equal to [CPMT 1991]
A.	\[12\,{{P}_{1}}{{V}_{1}}\]
B.	\[6\,{{P}_{1}}{{V}_{1}}\]
C.	\[3\,{{P}_{1}}{{V}_{1}}\]
D.	\[2{{P}_{1}}{{V}_{1}}\]
Answer» E.

Discussion

6605.	Figure shows the F-x graph. Where F is the force applied and x is the distance covered by the body along a straight line path. Given that F is in newton and x in metre, what is the work done?
A.	10 J
B.	20 J
C.	30 J
D.	40 J
Answer» B. 20 J

Discussion

6606.	The area under acceleration-time graph gives [Kerala PET 2005]
A.	Distance travelled
B.	Change in acceleration
C.	Force acting
D.	Change in velocity
Answer» E.

Discussion

6607.	Figure represents the graph of photo current I versus applied voltage (V). The maximum energy of the emitted photoelectrons is
A.	2eV
B.	4 eV
C.	0 eV
D.	4 J
Answer» C. 0 eV

Discussion

6608.	In the cyclic process shown in the figure, the work done by the gas in one cycle is [MP PMT 1999]
A.	\[28\,{{P}_{1}}{{V}_{1}}\]
B.	\[14\,{{P}_{1}}{{V}_{1}}\]
C.	\[18\,{{P}_{1}}{{V}_{1}}\]
D.	\[9\,{{P}_{1}}{{V}_{1}}\]
Answer» E.

Discussion

6609.	The potential energy of a particle varies with distance x as shown in the graph. The force acting on the particle is zero at
A.	C
B.	B
C.	B and C
D.	A and D
Answer» D. A and D

Discussion

6610.	A train moves from one station to another in 2 hours? time. Its speed-time graph during this motion is shown in the figure. The maximum acceleration during the journey is [Kerala PET 2002]
A.	\[140km\text{ }{{h}^{2}}\]
B.	\[160km\text{ }{{h}^{2}}\]
C.	\[100km\text{ }{{h}^{2}}\]
D.	\[120km\text{ }{{h}^{2}}\]
Answer» C. \[100km\text{ }{{h}^{2}}\]

Discussion

6611.	The curve between the work function of a metal \[({{\varphi }_{o}})\] and its temperature (T) will be
A.
B.
C.
D.
Answer» D.

Discussion

6612.	Figure represents a graph of kinetic energy (K) of photoelectrons (in eV) and frequency (v) for a metal used as cathode in photoelectric experiment. The work function of metal is
A.	1 eV
B.	1.5 eV
C.	2 eV
D.	3 eV
Answer» D. 3 eV

Discussion

6613.	In the figure given two processes A and B are shown by which a thermo-dynamical system goes from initial to final state F. If \[\Delta {{Q}_{A}}\] and \[\Delta {{Q}_{B}}\] are respectively the heats supplied to the systems then [RPET 1999]
A.	\[\Delta {{Q}_{A}}=\Delta {{Q}_{B}}\]
B.	\[\Delta {{Q}_{A}}\ge \Delta {{Q}_{B}}\]
C.	\[\Delta {{Q}_{A}}<\Delta {{Q}_{B}}\]
D.	\[\Delta {{Q}_{A}}>\Delta {{Q}_{B}}\]
Answer» E.

Discussion

6614.	The ammeter has range 1 ampere without shunt. the range can be varied by using different shunt resistances. The graph between shunt resistance and range will have the nature
A.	P
B.	Q
C.	R
D.	S
Answer» C. R

Discussion

6615.	A graph is shown between stress and strain for a metal. The part in which Hooke's law holds good is
A.	OA
B.	AB
C.	BC
D.	CD
Answer» B. AB

Discussion

6616.	The relationship between force and position is shown in the figure given (in one dimensional case). The work done by the force in displacing a body from x = 1 cm to x = 5 cm is [CPMT 1976]
A.	20 ergs
B.	60 ergs
C.	70 ergs
D.	700 ergs
Answer» B. 60 ergs

Discussion

6617.	In the figure given below, the position-time graph of a particle of mass 0.1 Kg is shown. The impulse at \[t=2\sec \] is [AIIMS 2005]
A.	0.2\[kg\,m{{\sec }^{-1}}\]
B.	\[-0.2kg\,m{{\sec }^{-1}}\]
C.	\[0.1kg\,m{{\sec }^{-1}}\]
D.	\[-0.4kg\,m{{\sec }^{-1}}\]
Answer» C. \[0.1kg\,m{{\sec }^{-1}}\]

Discussion

6618.	The displacement of a particle as a function of time is shown in the figure. The figure shows that [CPMT 1970, 86]
A.	The particle starts with certain velocity but the motion is retarded and finally the particle stops
B.	The velocity of the particle is constant throughout
C.	The acceleration of the particle is constant throughout.
D.	The particle starts with constant velocity, then motion is accelerated and finally the particle moves with another constant velocity
Answer» B. The velocity of the particle is constant throughout

Discussion

6619.	When light is incident on a medium at angle i and refracted into a second medium at an angle r, the graph of sin i vs sinr is as shown in the graph. From this, one can conclude that
A.	Velocity of light in the second medium is 1.73 times the velocity of light in the I medium
B.	Velocity of light in the medium is 1.73 times the velocity in the II medium
C.	The critical angle for the two media is given by sin \[{{i}_{c}}=\frac{1}{\sqrt{3}}\]
D.	sin \[{{i}_{c}}=\frac{1}{2}\]
Answer» C. The critical angle for the two media is given by sin \[{{i}_{c}}=\frac{1}{\sqrt{3}}\]

Discussion

6620.	Different voltages are applied across a P-N junction and the currents are measured for each value. Which of the following graphs is obtained between voltage and current [MP PET 1996; UPSEAT 2002]
A.
B.
C.
D.
Answer» D.

Discussion

6621.	The variation of the instantaneous current (I) and the instantaneous emf (E) in a circuit is as shown in fig. Which of the following statements is correct
A.	The voltage lags behind the current by p / 2
B.	The voltage leads the current by p / 2
C.	The voltage and the current are in phase
D.	The voltage leads the current by p
Answer» C. The voltage and the current are in phase

Discussion

6622.	Two very thin metallic wires placed along X and Y-axis carry equal currents as shown here. AB and CD are lines at \[45{}^\circ \] with the axes with origin of axes at O. The magnetic field will be zero on the line [MP PMT 1995; CBSE PMT 1996]
A.	AB
B.	CD
C.	Segment OB only of line AB
D.	Segment OC only of line CD
Answer» B. CD

Discussion

6623.	A man is standing on a railway platform listening to the whistle of an engine that passes the man at constant speed without stopping. If the engine passes the man at time \[{{t}_{0}}\]. How does the frequency \[f\] of the whistle as heard by the man changes with time [AMU 2001; KCET 2002; MP PMT 2004]
A.
B.
C.
D.
Answer» B.

Discussion

6624.	Which of the following plots may represent the thermal energy produced in a resistor in a given time as a function of the electric current [MP PMT 1999]
A.	a
B.	b
C.	c
D.	d
Answer» C. c

Discussion

6625.	The plots of intensity versus wavelength for three black bodies at temperatures T1, T2 and T3 respectively are as shown. Their temperature are such that [IIT-JEE (Screening) 2000]
A.	T1 >T2 > T3
B.	T1 >T3 > T2
C.	T2 >T3 > T1
D.	T3 >T2 > T1
Answer» C. T2 >T3 > T1

Discussion

6626.	A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is [Orissa JEE 2002]
A.	20 J
B.	? 20 J
C.	400 J
D.	? 374 J
Answer» C. 400 J

Discussion

6627.	The graph shows the variation of temperature (T) of one kilogram of a material with the heat (H) supplied to it. At O, the substance is in the solid state. From the graph, we can conclude that
A.	\[{{T}_{2}}\] is the melting point of the solid
B.	BC represents the change of state from solid to liquid
C.	\[({{H}_{2}}-{{H}_{1}})\] represents the latent heat of fusion of the substance
D.	\[({{H}_{3}}-{{H}_{1}})\] represents the latent heat of vaporization of the liquid
Answer» D. \[({{H}_{3}}-{{H}_{1}})\] represents the latent heat of vaporization of the liquid

Discussion

6628.	A small spherical solid ball is dropped from a great height in a viscous liquid. Its journey in the liquid is best described in the diagram given below by the [CPMT 1988]
A.	Curve A
B.	Curve B
C.	Curve C
D.	Curve D
Answer» C. Curve C

Discussion

6629.	Variation of current passing through a conductor as the voltage applied across its ends as varied is shown in the adjoining diagram. If the resistance (R) is determined at the points A, B, C and D, we will find that [CPMT 1988]
A.	RC = RD
B.	RB > RA
C.	RC > RB
D.	None of these
Answer» E.

Discussion

6630.	The variation of potential with distance \[R\] from a fixed point is as shown below. The electric field at \[R=5\,m\]is [NCERT 1975; MP PMT 2003]
A.	\[2.5\ volt/m\]
B.	\[-2.5\ volt/m\]
C.	\[2/5\ volt/m\]
D.	\[-2/5\ volt/m\]
Answer» B. \[-2.5\ volt/m\]

Discussion

6631.	The force acting on a body moving along x-axis varies with the position of the particle as shown in the fig. The body is in stable equilibrium at
A.	\[x={{x}_{1}}\]
B.	\[x={{x}_{2}}\]
C.	both \[{{x}_{1}}\] and \[{{x}_{2}}\]
D.	neither \[{{x}_{1}}\] nor \[{{x}_{2}}\]
Answer» C. both \[{{x}_{1}}\] and \[{{x}_{2}}\]

Discussion

6632.	For a convex lens the distance of the object is taken on X-axis and the distance of the image is taken on Y-axis, the nature of the graph so obtained is [BVP 2003]
A.	Straight line
B.	Circle
C.	Parabola
D.	Hyperbola
Answer» E.

Discussion

6633.	The correct curve between voltage gain \[({{A}_{v}})\] and load resistance \[({{R}_{L}})\] is
A.
B.
C.
D.
Answer» D.

Discussion

6634.	The stopping potential \[({{V}_{0}})\] versus frequency (n) plot of a substance is shown in figure the threshold wave length is
A.	\[5\times {{10}^{14}}m\]
B.	6000Å
C.	5000 Å
D.	Cannot be estimated from given data
Answer» C. 5000 Å

Discussion

6635.	The figure shows a graph between \[\ln \left\| \frac{{{A}_{n}}}{{{A}_{1}}} \right\|\] and ln\|n\|, where \[{{A}_{n}}\] is the area enclosed by the nth orbit in a hydrogen like atom. The correct curve is
A.	4
B.	3
C.	2
D.	1
Answer» B. 3

Discussion

6636.	Which of the following curves correctly represents the variation of capacitive reactance XC with frequency f [RPMT 1996]
A.
B.
C.
D.
Answer» C.

Discussion

6637.	A cyclic process ABCA is shown in the V-T diagram. Process on the P-V diagram is
A.
B.
C.
D.
Answer» D.

Discussion

6638.	V-i graphs for parallel and series combination of two identical resistors are as shown in figure. Which graph represents parallel combination
A.	A
B.	B
C.	A and B both
D.	Neither A nor B
Answer» B. B

Discussion

6639.	The points of maximum and minimum attraction in the curve between potential energy (U) and distance (r)of a diatomic molecules are respectively
A.	Sand R
B.	T and S
C.	R and S
D.	S and T
Answer» E.

Discussion

6640.	The value of amplification factor from the following graph will be
A.	10
B.	50
C.	25
D.	40
Answer» B. 50

Discussion

6641.	The mutual characteristic of triode is
A.
B.
C.
D.
Answer» D.

Discussion

6642.	The graph between number of decayed atoms \[{N}'\]of a radioactive element and time t is
A.
B.
C.
D.
Answer» D.

Discussion

6643.	According to Einstein?s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal versus the frequency, of the incident radiation gives a straight line whose slope [AIEEE 2004]
A.	Is the same for all metals and independent of the intensity of the radiation
B.	Depends on the intensity of the radiation
C.	Depends both on the intensity of the radiation and the metal used
D.	Depends on the nature of the metals used
Answer» B. Depends on the intensity of the radiation

Discussion

6644.	Which of the following plots may represent the reactance of a series LC combination [MP PMT 1999]
A.	a
B.	b
C.	c
D.	d
Answer» E.

Discussion

6645.	A square loop of side 5 cm enters a magnetic field with 1 cms-1. The front edge enters the magnetic field at t = 0 then which graph best depicts emf
A.
B.
C.
D.
Answer» D.

Discussion

6646.	In an experiment, a graph was plotted of the potential difference V between the terminals of a cell against the circuit current i by varying load rheostat. Internal conductance of the cell is given by
A.	xy
B.	\[\frac{y}{x}\]
C.	\[\frac{x}{y}\]
D.	(x ? y)
Answer» C. \[\frac{x}{y}\]

Discussion

6647.	Work done in the given P-V diagram in the cyclic process is [UPSEAT 1998; RPET 2000; Kerala PMT 2002]
A.	PV
B.	2PV
C.	PV/2
D.	3PV
Answer» B. 2PV

Discussion

6648.	A student plots a graph from his reading on the determination of Young?s modulus of a metal wire but forgets to label. The quantities on X and Y axes may be respectively.
A.	Weight hung and length increased
B.	Stress applied and length increased
C.	Stress applied and strain developed
D.	Length increased and weight hung
Answer» D. Length increased and weight hung

Discussion

6649.	A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photo current (i) with distance of the source from the emitter
A.	a
B.	b
C.	c
D.	d
Answer» E.

Discussion

6650.	The graphs given below depict the dependence of two reactive impedances X1 and X2 on the frequency of the alternating e.m.f. applied individually to them. We can then say that [Haryana CEE 1996; RPMT 2004]
A.	X1 is an inductor and X2 is a capacitor
B.	X1 is a resistor and X2 is a capacitor
C.	X1 is a capacitor and X2 is an inductor
D.	X1 is an inductor and X2 is a resistor
Answer» D. X1 is an inductor and X2 is a resistor

Discussion

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

Heat energy absorbed by a system in going through a cyclic process shown in figure is [AIIMS 1995; BHU 2002]

The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with the above spring of half length, the line OA will

The ratio of thermionic currents (I/I0) for a metal when the temperature is slowly increased \[{{T}_{0}}\] to \[T\] as shown in figure. (I and I0 are currents at T and respectively). Then which one is correct? [Orissa JEE 2002]

An ideal gas is taken around the cycle ABCA as shown in the P-V diagram. The net work done by the gas during the cycle is equal to [CPMT 1991]

Figure shows the F-x graph. Where F is the force applied and x is the distance covered by the body along a straight line path. Given that F is in newton and x in metre, what is the work done?

The area under acceleration-time graph gives [Kerala PET 2005]

Figure represents the graph of photo current I versus applied voltage (V). The maximum energy of the emitted photoelectrons is

In the cyclic process shown in the figure, the work done by the gas in one cycle is [MP PMT 1999]

The potential energy of a particle varies with distance x as shown in the graph. The force acting on the particle is zero at

A train moves from one station to another in 2 hours? time. Its speed-time graph during this motion is shown in the figure. The maximum acceleration during the journey is [Kerala PET 2002]

The curve between the work function of a metal \[({{\varphi }_{o}})\] and its temperature (T) will be

Figure represents a graph of kinetic energy (K) of photoelectrons (in eV) and frequency (v) for a metal used as cathode in photoelectric experiment. The work function of metal is

In the figure given two processes A and B are shown by which a thermo-dynamical system goes from initial to final state F. If \[\Delta {{Q}_{A}}\] and \[\Delta {{Q}_{B}}\] are respectively the heats supplied to the systems then [RPET 1999]

The ammeter has range 1 ampere without shunt. the range can be varied by using different shunt resistances. The graph between shunt resistance and range will have the nature

A graph is shown between stress and strain for a metal. The part in which Hooke's law holds good is

The relationship between force and position is shown in the figure given (in one dimensional case). The work done by the force in displacing a body from x = 1 cm to x = 5 cm is [CPMT 1976]

In the figure given below, the position-time graph of a particle of mass 0.1 Kg is shown. The impulse at \[t=2\sec \] is [AIIMS 2005]

The displacement of a particle as a function of time is shown in the figure. The figure shows that [CPMT 1970, 86]

When light is incident on a medium at angle i and refracted into a second medium at an angle r, the graph of sin i vs sinr is as shown in the graph. From this, one can conclude that

Different voltages are applied across a P-N junction and the currents are measured for each value. Which of the following graphs is obtained between voltage and current [MP PET 1996; UPSEAT 2002]

The variation of the instantaneous current (I) and the instantaneous emf (E) in a circuit is as shown in fig. Which of the following statements is correct

Two very thin metallic wires placed along X and Y-axis carry equal currents as shown here. AB and CD are lines at \[45{}^\circ \] with the axes with origin of axes at O. The magnetic field will be zero on the line [MP PMT 1995; CBSE PMT 1996]

Which of the following plots may represent the thermal energy produced in a resistor in a given time as a function of the electric current [MP PMT 1999]

The plots of intensity versus wavelength for three black bodies at temperatures T1, T2 and T3 respectively are as shown. Their temperature are such that [IIT-JEE (Screening) 2000]

A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is [Orissa JEE 2002]

The graph shows the variation of temperature (T) of one kilogram of a material with the heat (H) supplied to it. At O, the substance is in the solid state. From the graph, we can conclude that

A small spherical solid ball is dropped from a great height in a viscous liquid. Its journey in the liquid is best described in the diagram given below by the [CPMT 1988]

Variation of current passing through a conductor as the voltage applied across its ends as varied is shown in the adjoining diagram. If the resistance (R) is determined at the points A, B, C and D, we will find that [CPMT 1988]

The variation of potential with distance \[R\] from a fixed point is as shown below. The electric field at \[R=5\,m\]is [NCERT 1975; MP PMT 2003]

The force acting on a body moving along x-axis varies with the position of the particle as shown in the fig. The body is in stable equilibrium at

For a convex lens the distance of the object is taken on X-axis and the distance of the image is taken on Y-axis, the nature of the graph so obtained is [BVP 2003]

The correct curve between voltage gain \[({{A}_{v}})\] and load resistance \[({{R}_{L}})\] is

The stopping potential \[({{V}_{0}})\] versus frequency (n) plot of a substance is shown in figure the threshold wave length is

The figure shows a graph between \[\ln \left| \frac{{{A}_{n}}}{{{A}_{1}}} \right|\] and ln|n|, where \[{{A}_{n}}\] is the area enclosed by the nth orbit in a hydrogen like atom. The correct curve is

Which of the following curves correctly represents the variation of capacitive reactance XC with frequency f [RPMT 1996]

A cyclic process ABCA is shown in the V-T diagram. Process on the P-V diagram is

V-i graphs for parallel and series combination of two identical resistors are as shown in figure. Which graph represents parallel combination

The points of maximum and minimum attraction in the curve between potential energy (U) and distance (r)of a diatomic molecules are respectively

The value of amplification factor from the following graph will be

The mutual characteristic of triode is

The graph between number of decayed atoms \[{N}'\]of a radioactive element and time t is

According to Einstein?s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal versus the frequency, of the incident radiation gives a straight line whose slope [AIEEE 2004]

Which of the following plots may represent the reactance of a series LC combination [MP PMT 1999]

A square loop of side 5 cm enters a magnetic field with 1 cms-1. The front edge enters the magnetic field at t = 0 then which graph best depicts emf

In an experiment, a graph was plotted of the potential difference V between the terminals of a cell against the circuit current i by varying load rheostat. Internal conductance of the cell is given by

Work done in the given P-V diagram in the cyclic process is [UPSEAT 1998; RPET 2000; Kerala PMT 2002]

A student plots a graph from his reading on the determination of Young?s modulus of a metal wire but forgets to label. The quantities on X and Y axes may be respectively.

A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photo current (i) with distance of the source from the emitter

The graphs given below depict the dependence of two reactive impedances X1 and X2 on the frequency of the alternating e.m.f. applied individually to them. We can then say that [Haryana CEE 1996; RPMT 2004]