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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.
| 5751. |
In the circuit shown, A and V are ideal ammeter and voltmeter respectively. Reading of the voltmeter will be |
| A. | 2 V |
| B. | 1 V |
| C. | 0.5 V |
| D. | Zero |
| Answer» E. | |
| 5752. |
In the above question, potential difference across the \[40\,\Omega \] resistance will be |
| A. | Zero |
| B. | 80 V |
| C. | 40 V |
| D. | 120 V |
| Answer» B. 80 V | |
| 5753. |
In the circuit shown, potential difference between X and Y will be |
| A. | Zero |
| B. | 20 V |
| C. | 60 V |
| D. | 120 V |
| Answer» E. | |
| 5754. |
The terminal potential difference of a cell is greater than its e.m.f. when it is |
| A. | Being discharged |
| B. | In open circuit |
| C. | Being charged |
| D. | Being either charged or discharged |
| Answer» D. Being either charged or discharged | |
| 5755. |
The figure below shows currents in a part of electric circuit. The current i is [CPMT 1981; RPET 1999] |
| A. | 1.7 amp |
| B. | 3.7 amp |
| C. | 1.3 amp |
| D. | 1 amp |
| Answer» B. 3.7 amp | |
| 5756. |
The battery \[E\] has an \[e.m.f.\] of \[2\,volt\]. If the galvanometer \[G\] reads zero, then the value of the resistance \[X\] in ohm is [NCERT 1990; AIEEE 2005] |
| A. | 10 |
| B. | 100 |
| C. | 500 |
| D. | 200 |
| Answer» C. 500 | |
| 5757. |
A car turns a corner on a slippery road at a constant speed of \[10\,m/s\]. If the coefficient of friction is 0.5, the minimum radius of the arc in meter in which the car turns is |
| A. | 20 |
| B. | 10 |
| C. | 5 |
| D. | 4 |
| Answer» B. 10 | |
| 5758. |
A 60 kg body is pushed with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficient of static friction and sliding friction are 0.5 and 0.4 respectively. The acceleration of the body is |
| A. | \[6\,m/{{s}^{2}}\] |
| B. | \[4.9\,m/{{s}^{2}}\] |
| C. | \[3.92\,m/{{s}^{2}}\] |
| D. | \[1\,m/{{s}^{2}}\] |
| Answer» E. | |
| 5759. |
A body B lies on a smooth horizontal table and another body A is placed on B. The coefficient of friction between A and B is \[\mu \]. What acceleration given to B will cause slipping to occur between A and B |
| A. | \[\mu g\] |
| B. | \[g/\mu \] |
| C. | \[\mu /g\] |
| D. | \[\sqrt{\mu g}\] |
| Answer» B. \[g/\mu \] | |
| 5760. |
Two carts of masses 200 kg and 300 kg on horizontal rails are pushed apart. Suppose the coefficient of friction between the carts and the rails are same. If the 200 kg cart travels a distance of 36 m and stops, then the distance travelled by the cart weighing 300 kg is [CPMT 1989; DPMT 2002] |
| A. | 32 m |
| B. | 24 m |
| C. | 16 m |
| D. | 12 m |
| Answer» D. 12 m | |
| 5761. |
A body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 sec is \[(J=4.2\,joule/cal\] and \[g=9.8\,m/{{s}^{2}})\] [MH CET (Med.) 2001] |
| A. | 9.33 cal |
| B. | 10.21 cal |
| C. | 12.67 cal |
| D. | 13.34 cal |
| Answer» B. 10.21 cal | |
| 5762. |
A block of mass 5 kg is on a rough horizontal surface and is at rest. Now a force of 24 N is imparted to it with negligible impulse. If the coefficient of kinetic friction is 0.4 and \[g=9.8\,m/{{s}^{2}}\], then the acceleration of the block is |
| A. | \[0.26\,m/{{s}^{2}}\] |
| B. | \[0.39\,m/{{s}^{2}}\] |
| C. | \[0.69\,m/{{s}^{2}}\] |
| D. | \[0.88\,m/{{s}^{2}}\] |
| Answer» E. | |
| 5763. |
A cylinder of 10 kg is sliding in a plane with an initial velocity of 10 m/s. If the coefficient of friction between the surface and cylinder is 0.5 then before stopping, it will cover. \[(g=10\,\,m/{{s}^{2}})\] [Pb. PMT 2004] |
| A. | 2.5 m |
| B. | 5 m |
| C. | 7.5 m |
| D. | 10 m |
| Answer» E. | |
| 5764. |
Consider a car moving on a straight road with a speed of 100 m/s. The distance at which car can be stopped is \[[{{\mu }_{k}}=0.5]\] [AIEEE 2005] |
| A. | 100 m |
| B. | 400 m |
| C. | 800 m |
| D. | 1000 m |
| Answer» E. | |
| 5765. |
A body is moving along a rough horizontal surface with an initial velocity \[6\,\,m/s.\] If the body comes to rest after travelling 9 m, then the coefficient of sliding friction will be [BCECE 2004] |
| A. | 0.4 |
| B. | 0.2 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» C. 0.6 | |
| 5766. |
A block of mass \[M=5\,kg\] is resting on a rough horizontal surface for which the coefficient of friction is 0.2. When a force \[F=40\,\,N\] is applied, the acceleration of the block will be \[(g=10\,\,m/{{s}^{2}})\] [MP PMT 2004] |
| A. | \[5.73\,\,m/{{\sec }^{2}}\] |
| B. | \[8.0\,\,m/{{\sec }^{2}}\] |
| C. | \[3.17\,\,m/{{\sec }^{2}}\] |
| D. | \[10.0\,\,m/{{\sec }^{2}}\] |
| Answer» B. \[8.0\,\,m/{{\sec }^{2}}\] | |
| 5767. |
A fireman of mass 60 kg slides down a pole. He is pressing the pole with a force of 600 N. The coefficient of friction between the hands and the pole is 0.5, with what acceleration will the fireman slide down (g = 10 m/s2) [Pb. PMT 2002] |
| A. | 1 m/s2 |
| B. | 2.5 m/s2 |
| C. | 10 m/s2 |
| D. | 5 m/s2 |
| Answer» E. | |
| 5768. |
A motorcycle is travelling on a curved track of radius 500m. If the coefficient of friction between road and tyres is 0.5, the speed avoiding skidding will be [MH CET (Med.) 2001] |
| A. | 50 m/s |
| B. | 75 m/s |
| C. | 25 m/s |
| D. | 35 m/s |
| Answer» B. 75 m/s | |
| 5769. |
A body of mass 5kg rests on a rough horizontal surface of coefficient of friction 0.2. The body is pulled through a distance of 10m by a horizontal force of 25 N. The kinetic energy acquired by it is (g = 10 ms2) [EAMCET (Med.) 2000] |
| A. | 330 J |
| B. | 150 J |
| C. | 100 J |
| D. | 50 J |
| Answer» C. 100 J | |
| 5770. |
If \[{{\mu }_{s}},\,{{\mu }_{k}}\] and \[{{\mu }_{r}}\] are coefficients of static friction, sliding friction and rolling friction, then [EAMCET (Engg.) 1995] |
| A. | \[{{\mu }_{s}}<{{\mu }_{k}}<{{\mu }_{r}}\] |
| B. | \[{{\mu }_{k}}<{{\mu }_{r}}<{{\mu }_{s}}\] |
| C. | \[{{\mu }_{r}}<{{\mu }_{k}}<{{\mu }_{s}}\] |
| D. | \[{{\mu }_{r}}={{\mu }_{k}}={{\mu }_{s}}\] |
| Answer» D. \[{{\mu }_{r}}={{\mu }_{k}}={{\mu }_{s}}\] | |
| 5771. |
A car is moving along a straight horizontal road with a speed \[{{v}_{0}}\]. If the coefficient of friction between the tyres and the road is \[\mu \], the shortest distance in which the car can be stopped is [MP PET 1985; BHU 2002] |
| A. | \[\frac{v_{0}^{2}}{2\mu g}\] |
| B. | \[\frac{{{v}_{0}}}{\mu g}\] |
| C. | \[{{\left( \frac{{{v}_{0}}}{\mu g} \right)}^{2}}\] |
| D. | \[\frac{{{v}_{0}}}{\mu }\] |
| Answer» B. \[\frac{{{v}_{0}}}{\mu g}\] | |
| 5772. |
A 60 kg weight is dragged on a horizontal surface by a rope upto 2 metres. If coefficient of friction is \[\mu =0.5\], the angle of rope with the surface is 60° and \[g=9.8\,m/{{\sec }^{2}}\], then work done is [MP PET 1995] |
| A. | 294 joules |
| B. | 315 joules |
| C. | 588 joules |
| D. | 197 joules |
| Answer» C. 588 joules | |
| 5773. |
A car having a mass of 1000 kg is moving at a speed of 30 metres/sec. Brakes are applied to bring the car to rest. If the frictional force between the tyres and the road surface is 5000 newtons, the car will come to rest in [MP PMT 1995] |
| A. | 5 seconds |
| B. | 10 seconds |
| C. | 12 seconds |
| D. | 6 seconds |
| Answer» E. | |
| 5774. |
A horizontal force of 129.4 N is applied on a 10 kg block which rests on a horizontal surface. If the coefficient of friction is 0.3, the acceleration should be |
| A. | \[9.8\,m/{{s}^{2}}\] |
| B. | \[10\,m/{{s}^{2}}\] |
| C. | \[12.6\,m/{{s}^{2}}\] |
| D. | \[19.6\,m/{{s}^{2}}\] |
| Answer» C. \[12.6\,m/{{s}^{2}}\] | |
| 5775. |
A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10s. Then the coefficient of friction is [AIEEE 2003] |
| A. | 0.01 |
| B. | 0.02 |
| C. | 0.03 |
| D. | 0.06 |
| Answer» E. | |
| 5776. |
A block of mass 10 kg is placed on a rough horizontal surface having coefficient of friction m = 0.5. If a horizontal force of 100 N is acting on it, then acceleration of the block will be [AIIMS 2002] |
| A. | \[0.5m/{{s}^{2}}\] |
| B. | \[5m/{{s}^{2}}\] |
| C. | \[10m/{{s}^{2}}\] |
| D. | \[15m/{{s}^{2}}\] |
| Answer» C. \[10m/{{s}^{2}}\] | |
| 5777. |
It is easier to roll a barrel than pull it along the road. This statement is [BVP 2003] |
| A. | False |
| B. | True |
| C. | Uncertain |
| D. | Not possible |
| Answer» C. Uncertain | |
| 5778. |
When a body is moving on a surface, the force of friction is called [MP PET 2002] |
| A. | Static friction |
| B. | Dynamic friction |
| C. | Limiting friction |
| D. | Rolling friction |
| Answer» C. Limiting friction | |
| 5779. |
A body of weight 64 N is pushed with just enough force to start it moving across a horizontal floor and the same force continues to act afterwards. If the coefficients of static and dynamic friction are 0.6 and 0.4 respectively, the acceleration of the body will be (Acceleration due to gravity = g) [EAMCET 2001] |
| A. | \[\frac{g}{6.4}\] |
| B. | 0.64 g |
| C. | \[\frac{g}{32}\] |
| D. | 0.2 g |
| Answer» E. | |
| 5780. |
On the horizontal surface of a truck (m = 0.6), a block of mass 1 kg is placed. If the truck is accelerating at the rate of 5m/sec2 then frictional force on the block will be [CBSE PMT 2001] |
| A. | 5 N |
| B. | 6 N |
| C. | 5.88 N |
| D. | 8 N |
| Answer» B. 6 N | |
| 5781. |
A vehicle of mass m is moving on a rough horizontal road with momentum P. If the coefficient of friction between the tyres and the road be m, then the stopping distance is [CBSE PMT 2001] |
| A. | \[\frac{P}{2\mu \,m\,g}\] |
| B. | \[\frac{{{P}^{2}}}{2\mu \,m\,g}\] |
| C. | \[\frac{P}{2\mu \,m{{\,}^{2}}g}\] |
| D. | \[\frac{{{P}^{2}}}{2\mu \,m{{\,}^{2}}g}\] |
| Answer» E. | |
| 5782. |
The maximum speed that can be achieved without skidding by a car on a circular unbanked road of radius R and coefficient of static friction \[\mu \], is [NCERT 1990] |
| A. | \[\mu Rg\] |
| B. | \[Rg\sqrt{\mu }\] |
| C. | \[\mu \sqrt{Rg}\] |
| D. | \[\sqrt{\mu Rg}\] |
| Answer» E. | |
| 5783. |
A block of mass 50 kg slides over a horizontal distance of 1 m. If the coefficient of friction between their surfaces is 0.2, then work done against friction is [BHU 2001; CBSE PMT 1999, 2000; AIIMS 2000] |
| A. | 98 J |
| B. | 72J |
| C. | 56 J |
| D. | 34 J |
| Answer» B. 72J | |
| 5784. |
The maximum speed of a car on a road turn of radius 30m; if the coefficient of friction between the tyres and the road is 0.4; will be [MH CET (Med.) 1999] |
| A. | 9.84 m/s |
| B. | 10.84 m/s |
| C. | 7.84 m/s |
| D. | 5.84 m/s |
| Answer» C. 7.84 m/s | |
| 5785. |
Assuming the coefficient of friction between the road and tyres of a car to be 0.5, the maximum speed with which the car can move round a curve of 40.0 m radius without slipping, if the road is unbanked, should be [AMU 1995] |
| A. | 25 m/s |
| B. | 19 m/s |
| C. | 14 m/s |
| D. | 11 m/s |
| Answer» D. 11 m/s | |
| 5786. |
Consider a car moving along a straight horizontal road with a speed of 72 km/h. If the coefficient of kinetic friction between the tyres and the road is 0.5, the shortest distance in which the car can be stopped is \[[g=10\,m{{s}^{-2}}]\] [CBSE PMT 1992] |
| A. | 30 m |
| B. | 40 m |
| C. | 72 m |
| D. | 20 m |
| Answer» C. 72 m | |
| 5787. |
A 500 kg horse pulls a cart of mass 1500 kg along a level road with an acceleration of \[1\,m{{s}^{-2}}\]. If the coefficient of sliding friction is 0.2, then the force exerted by the horse in forward direction is [SCRA 1998] |
| A. | 3000 N |
| B. | 4000 N |
| C. | 5000 N |
| D. | 6000 N |
| Answer» E. | |
| 5788. |
A body of 10 kg is acted by a force of 129.4 N if \[g=9.8\,m/{{\sec }^{2}}\]. The acceleration of the block is \[10\,m/{{s}^{2}}\]. What is the coefficient of kinetic friction [EAMCET 1994] |
| A. | 0.03 |
| B. | 0.01 |
| C. | 0.30 |
| D. | 0.25 |
| Answer» D. 0.25 | |
| 5789. |
A block of mass 50 kg can slide on a rough horizontal surface. The coefficient of friction between the block and the surface is 0.6. The least force of pull acting at an angle of 30° to the upward drawn vertical which causes the block to just slide is [ISM Dhanbad 1994] |
| A. | 29.43 N |
| B. | 219.6 N |
| C. | 21.96 N |
| D. | 294.3 N |
| Answer» E. | |
| 5790. |
On a rough horizontal surface, a body of mass 2 kg is given a velocity of 10 m/s. If the coefficient of friction is 0.2 and \[g=10\,m/{{s}^{2}}\], the body will stop after covering a distance of [MP PMT 1999] |
| A. | 10 m |
| B. | 25 m |
| C. | 50 m |
| D. | 250 m |
| Answer» C. 50 m | |
| 5791. |
A motorcyclist of mass m is to negotiate a curve of radius r with a speed v. The minimum value of the coefficient of friction so that this negotiation may take place safely, is [Haryana CEE 1996] |
| A. | \[{{v}^{2}}rg\] |
| B. | \[\frac{{{v}^{2}}}{gr}\] |
| C. | \[\frac{gr}{{{v}^{2}}}\] |
| D. | \[\frac{g}{{{v}^{2}}r}\] |
| Answer» C. \[\frac{gr}{{{v}^{2}}}\] | |
| 5792. |
The earth revolves about the sun in an elliptical orbit with mean radius \[9.3\times {{10}^{7}}\,m\] in a period of 1 year. Assuming that there are no outside influences |
| A. | The earth's kinetic energy remains constant |
| B. | The earth's angular momentum remains constant |
| C. | The earth's potential energy remains constant |
| D. | All are correct |
| Answer» C. The earth's potential energy remains constant | |
| 5793. |
Venus looks brighter than other planets because [MNR 1985] |
| A. | It is heavier than other planets |
| B. | It has higher density than other planets |
| C. | It is closer to the earth than other planets |
| D. | It has no atmosphere |
| Answer» D. It has no atmosphere | |
| 5794. |
A planet moves around the sun. At a given point P, it is closest from the sun at a distance \[{{d}_{1}}\] and has a speed \[{{v}_{1}}\]. At another point Q, when it is farthest from the sun at a distance \[{{d}_{2}}\], its speed will be [MP PMT 1987; DCE 2002] |
| A. | \[\frac{d_{1}^{2}{{v}_{1}}}{d_{2}^{2}}\] |
| B. | \[\frac{{{d}_{2}}{{v}_{1}}}{{{d}_{1}}}\] |
| C. | \[\frac{{{d}_{1}}{{v}_{1}}}{{{d}_{2}}}\] |
| D. | \[\frac{d_{2}^{2}{{v}_{1}}}{d_{1}^{2}}\] |
| Answer» D. \[\frac{d_{2}^{2}{{v}_{1}}}{d_{1}^{2}}\] | |
| 5795. |
If the earth is at one-fourth of its present distance from the sun, the duration of the year will be [EAMCET 1987] |
| A. | Half the present year |
| B. | One-eighth the present year |
| C. | One-fourth the present year |
| D. | One-sixth the present year |
| Answer» C. One-fourth the present year | |
| 5796. |
Earth is revolving around the sun if the distance of the Earth from the Sun is reduced to 1/4th of the present distance then the present day length reduced by [BHU 2005] |
| A. | \[\frac{1}{4}\] |
| B. | \[\frac{1}{2}\] |
| C. | \[\frac{1}{8}\] |
| D. | \[\frac{1}{6}\] |
| Answer» D. \[\frac{1}{6}\] | |
| 5797. |
The condition for a uniform spherical mass m of radius r to be a black hole is [G= gravitational constant and g= acceleration due to gravity] [AIIMS 2005] |
| A. | \[{{(2Gm/r)}^{1/2}}\le c\] |
| B. | \[{{(2Gm/r)}^{1/2}}=c\] |
| C. | \[{{(2Gm/r)}^{1/2}}\ge c\] |
| D. | \[{{(gm/r)}^{1/2}}\ge c\] |
| Answer» D. \[{{(gm/r)}^{1/2}}\ge c\] | |
| 5798. |
If a body describes a circular motion under inverse square field, the time taken to complete one revolution T is related to the radius of the circular orbit as [NCERT 1975; RPMT 2000] |
| A. | \[T\propto r\] |
| B. | \[T\propto {{r}^{2}}\] |
| C. | \[{{T}^{2}}\propto {{r}^{3}}\] |
| D. | \[T\propto {{r}^{4}}\] |
| Answer» D. \[T\propto {{r}^{4}}\] | |
| 5799. |
Two satellite are revolving around the earth with velocities \[{{v}_{1}}\]and \[{{v}_{2}}\] and in radii \[{{r}_{1}}\] and \[{{r}_{2}}({{r}_{1}}>{{r}_{2}})\]respectively. Then [BHU 2005] |
| A. | \[{{v}_{1}}={{v}_{2}}\] |
| B. | \[{{v}_{1}}>{{v}_{2}}\] |
| C. | \[{{v}_{1}}<{{v}_{2}}\] |
| D. | \[\frac{{{v}_{1}}}{{{r}_{1}}}=\frac{{{v}_{2}}}{{{r}_{2}}}\] |
| Answer» D. \[\frac{{{v}_{1}}}{{{r}_{1}}}=\frac{{{v}_{2}}}{{{r}_{2}}}\] | |
| 5800. |
Hubble's law states that the velocity with which milky way is moving away from the earth is proportional to [Kerala PMT 2004] |
| A. | Square of the distance of the milky way from the earth |
| B. | Distance of milky way from the earth |
| C. | Mass of the milky way |
| D. | Product of the mass of the milky way and its distance from the earth |
| E. | Mass of the earth |
| Answer» C. Mass of the milky way | |