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MCQOPTIONS
This section includes 12583 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.
| 6501. |
Suppose, the acceleration due to gravity at the earth?s surface is 10 m/s2 and at the surface of Mars it is 4.0 m/s2. A 60 kg passenger goes from the earth to the Mars in a spaceship moving with a constant velocity. Neglect all other objects in the sky. Which part of figure best represents the weight (net gravitational force)of the passenger as a function of time. |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 6502. |
A 10kg mass moves along x-axis. Its acceleration as a function of its position is shown in the figure. What is the total work done on the mass by the force as the mass moves from \[x=0\] to \[x=8\,cm\] [AMU (Med.) 2000] |
| A. | \[8\times {{10}^{-2}}joules\] |
| B. | \[16\times {{10}^{-2}}joules\] |
| C. | \[4\times {{10}^{-4}}joules\] |
| D. | \[1.6\times {{10}^{-3}}joules\] |
| Answer» B. \[16\times {{10}^{-2}}joules\] | |
| 6503. |
The displacement versus time graph for a body moving in a straight line is shown in figure. Which of the following regions represents the motion when no force is acting on the body [NCERT 1971] |
| A. | \[ab\] |
| B. | \[bc\] |
| C. | \[=1204\ m\] |
| D. | \[de\] |
| Answer» D. \[de\] | |
| 6504. |
In the half-wave rectifier circuit shown. Which one of the following wave forms is true for \[{{V}_{CD}}\], the output across C and D? |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 6505. |
A radioactive sample has \[{{N}_{0}}\] active atoms at \[t=0\]. If the rate of disintegration at any time is R and the number of atoms is N, then the ratio R/N varies with time as |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» E. | |
| 6506. |
The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency n of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by [CPMT 1987; Similar to MP PMT 2000; Kerala PET 2001] |
| A. | Slope of the line |
| B. | Product of slope on the line and charge on the electron |
| C. | Product of intercept along Y-axis and mass of the electron |
| D. | Product of Slope and mass of electron |
| Answer» C. Product of intercept along Y-axis and mass of the electron | |
| 6507. |
The r.m.s. voltage of the wave form shown is |
| A. | 10 V |
| B. | 7 V |
| C. | 6.37 V |
| D. | None of these |
| Answer» B. 7 V | |
| 6508. |
Some magnetic flux is changed from a coil of resistance 10 ohm. As a result an induced current is developed in it, which varies with time as shown in figure. The magnitude of change in flux through the coil in webers is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | None of these |
| Answer» B. 4 | |
| 6509. |
The relative permeability \[({{\mu }_{r}})\] of a ferromagnetic substance varies with temperature (T) according to the curve |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 6510. |
A long thin hollow metallic cylinder of radius 'R' has a current i ampere. The magnetic induction 'B'-away from the axis at a distance r from the axis varies as shown in |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 6511. |
For a particle executing S.H.M. the displacement x is given by \[x=A\cos \omega t\]. Identify the graph which represents the variation of potential energy (P.E.) as a function of time t and displacement x [IIT JEE (Screening) 2003] |
| A. | I, III |
| B. | II, IV |
| C. | II, III |
| D. | I, IV |
| Answer» B. II, IV | |
| 6512. |
Which of the following graphs correctly represents the variation of \[\beta =-(dV/dP)/V\] with P for an ideal gas at constant temperature [IIT-JEE (Screening) 2002] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 6513. |
A solid substance is at 30°C. To this substance heat energy is supplied at a constant rate. Then temperature versus time graph is as shown in the figure. The substance is in liquid state for the portion (of the graph) [RPET 1990, 94] |
| A. | BC |
| B. | CD |
| C. | ED |
| D. | EF |
| Answer» C. ED | |
| 6514. |
The strain-stress curves of three wires of different materials are shown in the figure. P, Q and R are the elastic limits of the wires. The figure shows that |
| A. | Elasticity of wire P is maximum |
| B. | Elasticity of wire Q is maximum |
| C. | Tensile strength of R is maximum |
| D. | None of the above is true |
| Answer» E. | |
| 6515. |
The electric field due to a uniformly charged sphere of radius R as a function of the distance from its centre is represented graphically by [AIIMS 2004] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 6516. |
Adjacent figure shows the force-displacement graph of a moving body, the work done in displacing body from \[x=0\] to \[x=35\,m\] is equal to [BHU 1997] |
| A. | 50 J |
| B. | 25 J |
| C. | 287.5 J |
| D. | 200 J |
| Answer» D. 200 J | |
| 6517. |
A body of 2 kg has an initial speed 5ms?1. A force acts on it for some time in the direction of motion. The force time graph is shown in figure. The final speed of the body. |
| A. | \[9.25\,m{{s}^{-1}}\] |
| B. | \[5\,m{{s}^{-1}}\] |
| C. | \[14.25m{{s}^{1}}\] |
| D. | \[4.25m{{s}^{1}}\] |
| Answer» D. \[4.25m{{s}^{1}}\] | |
| 6518. |
The \[v-t\] graph of a moving object is given in figure. The maximum acceleration is [NCERT 1972] |
| A. | \[1cm/\sec {{c}^{2}}\] |
| B. | \[2cm/{{\sec }^{2}}\] |
| C. | \[3\,\,cm/{{\sec }^{2}}\] |
| D. | \[6\,\,cm/{{\sec }^{2}}\] |
| Answer» E. | |
| 6519. |
The graph shows how the magnification m produced by a convex thin lens varies with image distance v. What was the focal length of the used [DPMT 1995] |
| A. | \[\frac{b}{c}\] |
| B. | \[\frac{b}{ca}\] |
| C. | \[\frac{bc}{a}\] |
| D. | \[\frac{c}{b}\] |
| Answer» E. | |
| 6520. |
The resistance of a germanium junction diode whose \[V-I\] is shown in figure is \[({{V}_{k}}=0.3V)\] |
| A. | 5 kW |
| B. | 0.2 kW |
| C. | 2.3 kW |
| D. | \[\left( \frac{10}{2.3} \right)k\Omega \] |
| Answer» C. 2.3 kW | |
| 6521. |
Radioactive element decays to form a stable nuclide, then the rate of decay of reactant \[\left( \frac{dN}{dt} \right)\] will vary with time (t) as shown in figure [DCE 2000] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» D. | |
| 6522. |
For the photoelectric effect, the maximum kinetic energy \[{{E}_{k}}\] of the emitted photoelectrons is plotted against the frequency n of the incident photons as shown in the figure. The slope of the curve gives [CPMT 1987; MP PET 2001; DPMT 2002] |
| A. | Charge of the electron |
| B. | Work function of the metal |
| C. | Planck's constant |
| D. | Ratio of the Planck?s constant to electronic charge |
| Answer» D. Ratio of the Planck?s constant to electronic charge | |
| 6523. |
An ac source of variable frequency f is connected to an LCR series circuit. Which one of the graphs in figure. represents the variation of current of current I in the circuit with frequency f |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» E. | |
| 6524. |
Two parallel beams of protons and electrons, carrying equal currents are fixed at a separation d. The protons and electrons move in opposite directions. P is a point on a line joining the beams, at a distance x from any one beam. The magnetic field at P is B. If B is plotted against x, which of the following best represents the resulting curve |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» D. | |
| 6525. |
Fig. below shows the wave \[y=A\sin (\omega t-kx)\] at any instant travelling in the +ve x-direction. What is the slope of the curve at B |
| A. | \[\omega /A\] |
| B. | \[k/A\] |
| C. | \[kA\] |
| D. | \[\omega A\] |
| Answer» D. \[\omega A\] | |
| 6526. |
Variation of radiant energy emitted by sun, filament of tungsten lamp and welding arc as a function of its wavelength is shown in figure. Which of the following option is the correct match [IIT-JEE (Screening) 2005] |
| A. | Sun-\[{{T}_{1}},\] tungsten filament \[-{{T}_{2}},\] welding arc \[-{{T}_{3}}\] |
| B. | Sun\[-{{T}_{2}},\] tungsten filament \[-{{T}_{1}},\] welding arc \[-{{T}_{3}}\] |
| C. | Sun \[-{{T}_{3}},\] tungsten filament \[-{{T}_{2}},\] welding arc \[-{{T}_{1}}\] |
| D. | Sun \[-{{T}_{1}},\] tungsten filament \[-{{T}_{3}},\] welding arc \[-{{T}_{2}}\] |
| Answer» D. Sun \[-{{T}_{1}},\] tungsten filament \[-{{T}_{3}},\] welding arc \[-{{T}_{2}}\] | |
| 6527. |
An ideal gas of mass m in a state A goes to another state B via three different processes as shown in figure. If \[{{Q}_{1}},\,{{Q}_{2}}\] and \[{{Q}_{3}}\] denote the heat absorbed by the gas along the three paths, then [MP PET 1992] |
| A. | \[{{Q}_{1}}<{{Q}_{2}}<{{Q}_{3}}\] |
| B. | \[{{Q}_{1}}<{{Q}_{2}}={{Q}_{3}}\] |
| C. | \[{{Q}_{1}}={{Q}_{2}}>{{Q}_{3}}\] |
| D. | \[{{Q}_{1}}>{{Q}_{2}}>{{Q}_{3}}\] |
| Answer» B. \[{{Q}_{1}}<{{Q}_{2}}={{Q}_{3}}\] | |
| 6528. |
From amongst the following curves, which one shows the variation of the velocity v with time t for a small sized spherical body falling vertically in a long column of a viscous liquid [CPMT 1990] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» E. | |
| 6529. |
The figure given below shows the cooling curve of pure wax material after heating. It cools from A to B and solidifies along BD. If L and C are respective values of latent heat and the specific heat of the liquid wax, the ratio L/C is |
| A. | 40 |
| B. | 80 |
| C. | 100 |
| D. | 20 |
| Answer» E. | |
| 6530. |
I-V characteristic of a copper wire of length L and area of cross-section A is shown in figure. The slope of the curve becomes [Orissa JEE 2003] |
| A. | More if the experiment is performed at higher temperature |
| B. | More if a wire of steel of same dimension is used |
| C. | More if the length of the wire is increased |
| D. | Less if the length of the wire is increased |
| Answer» E. | |
| 6531. |
In the following P-V diagram two adiabatics cut two isothermals at temperatures T1 and T2 (fig.). The value of \[\frac{{{V}_{a}}}{{{V}_{d}}}\] will be |
| A. | \[\frac{{{V}_{b}}}{{{V}_{c}}}\] |
| B. | \[\frac{{{V}_{c}}}{{{V}_{b}}}\] |
| C. | \[\frac{{{V}_{d}}}{{{V}_{a}}}\] |
| D. | \[{{V}_{b}}{{V}_{c}}\] |
| Answer» B. \[\frac{{{V}_{c}}}{{{V}_{b}}}\] | |
| 6532. |
A sample of an ideal gas is taken through a cycle a shown in figure. It absorbs 50J of energy during the process AB, no heat during BC, rejects 70J during CA. 40J of work is done on the gas during BC. Internal energy of gas at A is 1500J, the internal energy at C would be |
| A. | 1590 J |
| B. | 1620 J |
| C. | 1540 J |
| D. | 1570 J |
| Answer» B. 1620 J | |
| 6533. |
P-V diagram of a cyclic process ABCA is as shown in figure. Choose the correct statement |
| A. | \[\Delta {{Q}_{A\to B}}\]= negative |
| B. | \[\Delta {{U}_{B\to C}}\]= positive |
| C. | \[\Delta {{W}_{CAB}}\]= negative |
| D. | All of these |
| Answer» E. | |
| 6534. |
In the following figure, four curves A, B, C and D are shown. The curves are [DCE 2003] |
| A. | Isothermal for A and D while adiabatic for B and C |
| B. | Adiabatic for A and C while isothermal for B and D |
| C. | Isothermal for A and B while adiabatic for C and D |
| D. | Isothermal for A and C while adiabatic for B and D |
| Answer» E. | |
| 6535. |
Which of the accompanying PV, diagrams best represents an isothermal process [MP PET 2005] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 6536. |
In the above graph, point D indicates |
| A. | Limiting point |
| B. | Yield point |
| C. | Breaking point |
| D. | None of the above |
| Answer» D. None of the above | |
| 6537. |
A force-time graph for a linear motion is shown in figure where the segments are circular. The linear momentum gained between zero and 8 second is [CPMT 1989] |
| A. | \[-2\pi \,newton\times second\] |
| B. | \[Zero\ newton\times second\] |
| C. | \[+4\pi \,newton\times second\] |
| D. | \[-6\pi \,newton\times second\] |
| Answer» C. \[+4\pi \,newton\times second\] | |
| 6538. |
Figure shows the displacement of a particle going along the X-axis as a function of time. The force acting on the particle is zero in the region |
| A. | AB |
| B. | BC |
| C. | CD |
| D. | DE |
| Answer» B. BC | |
| 6539. |
The graph between the displacement \[x\] and time \[t\] for a particle moving in a straight line is shown in figure. During the interval \[OA,\,AB,\,BC\] and \[t=1,\ {{v}_{x}}=0\], the acceleration of the particle is [CPMT 1986] |
| A. | OA, AB, BC, CD + 0 + + |
| B. | OA, AB, BC, CD - 0 + 0 |
| C. | OA, AB, BC, CD + 0 - + |
| D. | OA, AB, BC, CD - 0 - 0 |
| Answer» C. OA, AB, BC, CD + 0 - + | |
| 6540. |
The graph shows variation of v with change in u for a mirror. Points plotted above the point P on the curve are for values of v [CPMT 1987] |
| A. | Smaller then f |
| B. | Smaller then 2f |
| C. | Larger then 2f |
| D. | Larger than f |
| Answer» D. Larger than f | |
| 6541. |
The curve between charge density and distance near P-N junction will be |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 6542. |
If the following input signal is sent through a PN-junction diode, then the output signal across RL will be |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» D. | |
| 6543. |
A radioactive sample consists of two distinct species having equal number of atoms initially. The mean life time of one species is t and that of the other is 5t. The decay products in both cases are stable. A plot is made of the total number of radioactive nuclei as a function of time. Which of the following figures best represents the form of this plot [IIT-JEE (Screening) 2001] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» E. | |
| 6544. |
An alternating emf is applied across a parallel combination of a resistance R, capacitance C and an inductance L. If IR, IL, IC are the currents through R, L and C respectively, then the diagram which correctly represents, the phase relationship among IR, IL, IC and source emf E, is given by |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» D. | |
| 6545. |
An alternating current of frequency 200 rad/sec and peak value 1A as shown in the figure, is applied to the primary of a transformer. If the coefficient of mutual induction between the primary and the secondary is 1.5 H, the voltage induced in the secondary will be |
| A. | 300 V |
| B. | 191 V |
| C. | 220 V |
| D. | 471 V |
| Answer» C. 220 V | |
| 6546. |
Which of the following graphs shows the variation of thermoelectric power with temperature difference between hot and cold junction in thermocouples |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 6547. |
The diagram below shows the propagation of a wave. Which points are in same phase [AIIMS 1982] |
| A. | F, G |
| B. | C and E |
| C. | B and G |
| D. | B and F |
| Answer» E. | |
| 6548. |
The P-V diagram shows seven curved paths (connected by vertical paths) that can be followed by a gas. Which two of them should be parts of a closed cycle if the net work done by the gas is to be at its maximum value [AMU (Engg.) 2000] |
| A. | ac |
| B. | cg |
| C. | af |
| D. | cd |
| Answer» D. cd | |
| 6549. |
The portion AB of the indicator diagram representing the state of matter denotes |
| A. | The liquid state of matter |
| B. | Gaseous state of matter |
| C. | Change from liquid to gaseous state |
| D. | Change from gaseous state to liquid state |
| Answer» B. Gaseous state of matter | |
| 6550. |
From the graph between current I and voltage V shown below, identify the portion corresponding to negative resistance [CBSE PMT 1997] |
| A. | AB |
| B. | BC |
| C. | CD |
| D. | DE |
| Answer» D. DE | |