MCQOPTIONS
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MCQOPTIONS
This section includes 439 Mcqs, each offering curated multiple-choice questions to sharpen your SRMJEEE knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be |
| A. | 48 kg |
| B. | 60 kg |
| C. | 72 kg |
| D. | none of these. |
| Answer» B. 60 kg | |
| 152. |
The units of moment of inertia of an area, are |
| A. | kg/m |
| B. | kg/m² |
| C. | m⁴ |
| D. | m³ |
| Answer» D. m³ | |
| 153. |
A sphere is resting on two planes BA and BC which are inclined at 45° and 60° respectively with the horizontal. The reaction on the plane BA will be |
| A. | less than that on BC |
| B. | more than that of BC |
| C. | equal to that on BC |
| D. | zero |
| Answer» C. equal to that on BC | |
| 154. |
The force acting on a point on the surface of a rigid body may be considered to act |
| A. | at the centre of gravity of the body |
| B. | on the periphery of the body |
| C. | on any point on the line of action of the force |
| D. | at any point on the surface normal to the line of action of the force. |
| Answer» D. at any point on the surface normal to the line of action of the force. | |
| 155. |
A Seconds pendulum executes |
| A. | 0.5 beat per second |
| B. | 1.0 beat per second |
| C. | 2.0 beats per second |
| D. | 2.5 beats per second |
| Answer» D. 2.5 beats per second | |
| 156. |
For a self-locking machine, the efficiency should be |
| A. | less than 60% |
| B. | 50% |
| C. | more than 50% |
| D. | None of these. |
| Answer» B. 50% | |
| 157. |
A satellite moves in its orbit around the earth due to |
| A. | Gravitational force |
| B. | Centripetal force |
| C. | Centrifugal force |
| D. | none of these. |
| Answer» C. Centrifugal force | |
| 158. |
A satellite goes on moving along its orbit round the earth due to |
| A. | gravitational force |
| B. | centrifugal force |
| C. | centripital force |
| D. | none of these. |
| Answer» C. centripital force | |
| 159. |
For a particle moving with a simple harrmonic motion, the frequency is |
| A. | directly proportional to periodic time |
| B. | inversely proportional to periodic time |
| C. | inversely proportional to its angular velocity |
| D. | directly proportional to its angular velocity |
| Answer» C. inversely proportional to its angular velocity | |
| 160. |
Two shots fired simultaneously from the top and bottom of a vertical tower with elevations of 30° and 45° respectively strike a target simultaneously. If horizontal distance of the target from the tower is 1000 m, the height of the tower is |
| A. | 350 m |
| B. | 375 m |
| C. | 400 m |
| D. | 425 m. |
| Answer» E. | |
| 161. |
A smooth cylinder lying on its convex surface remains |
| A. | in stable equilibrium |
| B. | in unstable equilibrium |
| C. | in neutral equilibrium |
| D. | out of equilibrium |
| Answer» C. in neutral equilibrium | |
| 162. |
The units of inertia of mass, are |
| A. | kg/m |
| B. | kg/m² |
| C. | m⁴ |
| D. | kg-m². |
| Answer» E. | |
| 163. |
For a body moving with simple harmonic motion, the number of cycles per second, is known as its |
| A. | oscillation |
| B. | amplitude |
| C. | periodic time |
| D. | frequency. |
| Answer» E. | |
| 164. |
Pick up the correct statement from the following. A rubber ball when strikes a wall rebounds but a lead ball of same mass and velocity when strikes the same wall, falls down |
| A. | rubber and lead balls undergo equal changes in momentum |
| B. | change in momentum suffered by lead ball is less that of rubber ball |
| C. | momentum of rubber ball is less than that of lead ball |
| D. | none of these. |
| Answer» E. | |
| 165. |
Two parallel forces 20 kg and 15 kg act. In order that the distance of the resultant from 20 kg force may be the same as that of the former resultant was from 15 kg, the 20 kg force is diminished by |
| A. | 5.5 kg |
| B. | 6.25 kg |
| C. | 8.75 kg |
| D. | 10.5 kg. |
| Answer» D. 10.5 kg. | |
| 166. |
The resultant of the forces acting on a body will be zero if the body |
| A. | rotates |
| B. | moves with variable velocity in a straight line |
| C. | moves along a curved path |
| D. | does not move at all. |
| Answer» E. | |
| 167. |
For perfectly elastic bodies, the value of coefficient of restitution is |
| A. | zero |
| B. | 0.5 |
| C. | 1.0 |
| D. | between 0 and 1. |
| Answer» D. between 0 and 1. | |
| 168. |
If a ball which is dropped from a height of 2.25 m on a smooth floor attains the height of bounce equal to 1.00 m, the coefficient of the restitution between the ball and floor, is |
| A. | 0.25 |
| B. | 0.50 |
| C. | 0.67 |
| D. | 0.33 |
| Answer» C. 0.67 | |
| 169. |
The piston of a steam engine moves with a simple harmonic motion. The crank rotates 120 r.p.m. and the stroke length is 2 metres. The linear velocity of the piston when it is at a distance of 0.5 metre from the centre, is |
| A. | 5.88 m/sec |
| B. | 8.88 m/sec |
| C. | 10.88 m/sec |
| D. | 12.88 m/sec. |
| Answer» D. 12.88 m/sec. | |
| 170. |
Two particles have been projected at angles 64° and 45° to the horizontal. If the velocity of projection of first is 10 m/sec, the velocity of projection of the other for equal horizontal ranges is |
| A. | 9.3 m/sec |
| B. | 8.3 m/sec |
| C. | 7.3 m/sec |
| D. | 6.3 m/sec. |
| Answer» B. 8.3 m/sec | |
| 171. |
In simple harmonic motion, acceleration of a particle is proportional to |
| A. | rate of change of velocity |
| B. | displacement |
| C. | velocity |
| D. | direction |
| Answer» C. velocity | |
| 172. |
One half of a vibration of a body, is called |
| A. | period time |
| B. | oscillation |
| C. | beat |
| D. | amplitude. |
| Answer» D. amplitude. | |
| 173. |
A 50 kg boy climbs up a 8 m rope in gymnasiam in 10 sec. The average power developed by the boy is approximately |
| A. | 400 watts |
| B. | 500 watts |
| C. | 4000 watts |
| D. | none of these. |
| Answer» B. 500 watts | |
| 174. |
The motion of a bicycle wheel is |
| A. | translatory |
| B. | rotary |
| C. | rotary and translatory |
| D. | curvilinear |
| Answer» D. curvilinear | |
| 175. |
A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is |
| A. | 0.25 |
| B. | 0.50 |
| C. | 0.75 |
| D. | 1.0 |
| Answer» C. 0.75 | |
| 176. |
If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is movng downwards, the acceleration of the lift, is |
| A. | g/2 |
| B. | g/3 |
| C. | g/4 |
| D. | g/5 |
| Answer» C. g/4 | |
| 177. |
A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The velocity ratio of the lifting machine is |
| A. | 50 |
| B. | 55 |
| C. | 60 |
| D. | 65 |
| Answer» B. 55 | |
| 178. |
If a body moves in such a way that its velocity increases by equal amount in equal intervals of time, it is said to be moving with |
| A. | a uniform retardation |
| B. | a uniform acceleration |
| C. | a variable acceleration |
| D. | a variable retardation |
| Answer» D. a variable retardation | |
| 179. |
The Centre of gravity of a 10 x 15 x 5 cm T section from its bottom, is |
| A. | 7.5 cm |
| B. | 5.0 cm |
| C. | 8.75 cm |
| D. | 7.85 cm |
| Answer» D. 7.85 cm | |
| 180. |
A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight |
| A. | vertical component of velocity remains constant |
| B. | horizontal component of velocity remains constant |
| C. | speed of the ball remains constant |
| D. | kinetic energy of the ball remains constant. |
| Answer» C. speed of the ball remains constant | |
| 181. |
Varigon's theorem of moments states |
| A. | arithmetical sum of the moments of two forces about any point, is equal to the moments of their resultant about that point |
| B. | algebraic sum of the moments of two forces about any point, is equal to the moment of their resultant about that point |
| C. | arithmetical sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point |
| D. | algebraic sum of the moments of the forces about any point in their plane, is equal to the moment of their resulant about that point. |
| Answer» E. | |
| 182. |
Kinetic friction may be defined as |
| A. | friction force acting when the body is just about to move |
| B. | friction force acting when the body is in motion |
| C. | angle between normal reaction and resultant of normal reaction and limiting friction |
| D. | ratio of limiting friction and normal reaction. |
| Answer» C. angle between normal reaction and resultant of normal reaction and limiting friction | |
| 183. |
When a body falls freely under gravitational force, it possesses |
| A. | maximum weight |
| B. | minimum weight |
| C. | no weight |
| D. | no effect on its weight. |
| Answer» D. no effect on its weight. | |
| 184. |
Power developed by a torque, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 185. |
A stone is whirled in a vertical circle, the tension in the string, is maximum |
| A. | when the string is horizontal |
| B. | when the stone is at the highest position |
| C. | when the stone is at the lowest position |
| D. | at all the positions. |
| Answer» D. at all the positions. | |
| 186. |
One Newton force, is |
| A. | 10³ dynes |
| B. | 10⁴ dynes |
| C. | 10⁵ dynes |
| D. | 10⁶ dynes |
| Answer» D. 10⁶ dynes | |
| 187. |
The velocity of a moving body, is |
| A. | a vector quantity |
| B. | a scalar quantity |
| C. | a scalar as well as a vector quantity |
| D. | none of these. |
| Answer» B. a scalar quantity | |
| 188. |
A particle executes a simple harmonic motion. While passing through the mean position, the particle possesses |
| A. | maximum kinetic energy and minimum potential energy |
| B. | maximum kinetic energy and maximum potential energy |
| C. | minimum kinetic energy and maximum potential energy |
| D. | minimum kinetic, energy and minimum potential energy |
| Answer» B. maximum kinetic energy and maximum potential energy | |
| 189. |
Energy may be defined as |
| A. | power of doing work |
| B. | capacity of doing work |
| C. | rate of doing work |
| D. | all the above. |
| Answer» C. rate of doing work | |
| 190. |
Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by |
| A. | its longer side" |
| B. | its shorter side" |
| C. | the diagonal of the parallelogram which does not pass through the point of intersection of the forces" |
| D. | the diagonal of the parallelogram which passes through the point of intersection of the forces" |
| Answer» E. | |
| 191. |
The angle which an inclined surface makes with the horiontal when a body placed on it is on the point of moving down, is called |
| A. | angle of repose |
| B. | angle of friction |
| C. | angle of inclination |
| D. | none of these. |
| Answer» B. angle of friction | |
| 192. |
A number of forces acting simultaneously on a particle of a body |
| A. | may not be replaced by a single force |
| B. | may be replaced by a single force |
| C. | may be replaced by a single force through C.G. of the body |
| D. | may be replaced by a couple |
| Answer» C. may be replaced by a single force through C.G. of the body | |
| 193. |
A retarding force on a body does not |
| A. | change the motion of the body |
| B. | retard the motion of the body |
| C. | introduce the motion of the body |
| D. | none of these. |
| Answer» C. introduce the motion of the body | |
| 194. |
If two forces P and Q (P > Q) act on the same straight line but in opposite direction, their resultant, is |
| A. | P + Q |
| B. | P/Q |
| C. | Q/P |
| D. | P - Q |
| Answer» E. | |
| 195. |
According to Law of Triangle of Forces |
| A. | three forces acting at a point, can be rep-resented by the sides of a triangle, each side being in proportion to the force |
| B. | three forces acting along the sides of a triangle are always in equilibrium |
| C. | if three forces acting on a, point can be represented.in magnitude and direction, by the sides of a triangle taken in order, these will be in equilibrium |
| D. | if the forces acting on a particle be represented in magnitude and direction by the two sides of a triangle taken in order, their resultant will be represented in magnitude and direction by the third side of the triangle, taken in opposite order. |
| Answer» E. | |
| 196. |
To double the period of oscillation of a simple pendulum |
| A. | the mass of its bob should be doubled |
| B. | the mass of its bob should be quadrupled |
| C. | its lenght should be quadrupled |
| D. | its length should be doubled. |
| Answer» D. its length should be doubled. | |
| 197. |
The motion of a particle is described by the relation x = t²- 10t + 30, where x is in metres and t in seconds. The total distance travelled by the particle from t = 0 to t = 10 seconds would be |
| A. | zero |
| B. | 30 m |
| C. | 50 m |
| D. | 60 m |
| Answer» B. 30 m | |
| 198. |
If g1 and g2 are the gravitational accelerations on two mountains A and B respectively, the weight of a body when transported from A to B will be multiplied by |
| A. | g1 |
| B. | g2 |
| C. | g1/g2 |
| D. | g2/g1 |
| Answer» E. | |
| 199. |
The unit of Moment of Inertia of a body, is |
| A. | m |
| B. | m² |
| C. | m³ |
| D. | m⁴ |
| Answer» E. | |
| 200. |
The direction of projection should bisect the angle between the inclined plane and the vertical for a range of a projectile on inclined plane |
| A. | to be zero |
| B. | to be maximum |
| C. | to be minimum |
| D. | none of the these. |
| Answer» C. to be minimum | |