MCQOPTIONS
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MCQOPTIONS
This section includes 169 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
"One radian is defined to be the angle subtended where the arc length "S" is exactly equal to the?" |
| A. | radius of the circle. |
| B. | circumference of the circle. |
| C. | diameter of the circle. |
| D. | half of radius of the circle. |
| Answer» B. circumference of the circle. | |
| 152. |
For one complete revolution θ =? |
| A. | 360° |
| B. | 45° |
| C. | 90° |
| D. | 180° |
| Answer» B. 45° | |
| 153. |
To attain maximum range, the projectile must be launched at an angle of? |
| A. | 60° |
| B. | 0° |
| C. | 45° |
| D. | 90° |
| Answer» D. 90° | |
| 154. |
The total flight requires a time that is? |
| A. | twice the time necessary to reach the maximum height |
| B. | thrice the time necessary to reach the maximum height |
| C. | four times the time necessary to reach the maximum height. |
| D. | equal to the time necessary to reach the maximum height. |
| Answer» B. thrice the time necessary to reach the maximum height | |
| 155. |
The angle between centripetal acceleration and tangential acceleration is? |
| A. | 45° |
| B. | 90° |
| C. | 180° |
| D. | 0° |
| Answer» C. 180° | |
| 156. |
If a projectile is launched at 450 with velocity lOOm/s, it hit the target. It will have double the range if its velocity is: |
| A. | 141.4 m/s |
| B. | 400 m/s |
| C. | 200 m/s |
| D. | 173.2 m/s |
| Answer» B. 400 m/s | |
| 157. |
The motion on a curved path, when one component of velocity is constant and the other is variable is called? |
| A. | Projectile motion |
| B. | vibratory motion |
| C. | circular motion |
| D. | spin motion |
| Answer» B. vibratory motion | |
| 158. |
In the analysis of projectile motion, it is assumed that effect of air resistance is? |
| A. | important |
| B. | considerable |
| C. | None of these |
| D. | negligible |
| Answer» E. | |
| 159. |
If we drop a ball in horizontal direction than its motion will no longer be straight downward but will be at some? |
| A. | height to the vertical. |
| B. | angle to the vertical. |
| C. | steps to the vertical. |
| D. | distance to the vertical. |
| Answer» C. steps to the vertical. | |
| 160. |
A can filled with water is revolved in a vertical circle of radius 4 metre and the water does not fall down. The time period of revolution will be |
| A. | 10 sec |
| B. | 1 sec |
| C. | 4 sec |
| D. | 8 sec |
| Answer» D. 8 sec | |
| 161. |
A car is moving in horizontal circular track of radius 10 m, with a constant speed of 36 km/hour. A simple pendulum is suspended from the roof of the car. If the length of the simple pendulum is 1 m, what is the angle made by the string with the track? |
| A. | 60° |
| B. | 45° |
| C. | 90° |
| D. | 30° |
| Answer» C. 90° | |
| 162. |
A car of mass 800 kg moves on a circular track of radius 40 m. If the coefficient of friction is 0.5, then maximum velocity with which the car can move is |
| A. | 8 m/s |
| B. | 7 m/s |
| C. | 12 m/s |
| D. | 14 m/s |
| Answer» E. | |
| 163. |
A bucket containing water is tied to one end of a rope of length 2.5 m and rotated about the other end in a vertical circle. What should be the minimum velocity of the bucket at the highest point, so that the water in the bucket will not spill? (g = 10 m/s2) |
| A. | 5 m/s |
| B. | 4 m/s |
| C. | 2.5 m/s |
| D. | 7 m/s |
| Answer» B. 4 m/s | |
| 164. |
A bucket tied at the end of a 1.6 m long string is whirled in a vertical circle with a constant speed. What should be the minimum speed so that the water from the bucket does not spill when the bucket is at the highest position? |
| A. | 4 m/sec. |
| B. | 16 m/sec. |
| C. | 6.25 m/sec. |
| D. | None of these |
| Answer» B. 16 m/sec. | |
| 165. |
A car is moving with a speed of 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/s2. The acceleration of the car is |
| A. | 9.8 m/s2 |
| B. | 1.8 m/2 |
| C. | 2 m/s2 |
| D. | 2.7 m/s2 |
| Answer» E. | |
| 166. |
A car of mass 1000 kg moves on a circular road with a speed of 20 m/s. Its direction changes by 90° after traveling 628 m on the road. The centripetal force acting on the car is |
| A. | 500 N |
| B. | 1000 N |
| C. | 1500 N |
| D. | 2000 N |
| Answer» C. 1500 N | |
| 167. |
A coin kept on a rotating gramophone disc just begins to slip if its centre is at a distance of 8 cm from the centre of the disc. The angular velocity of the gramophone disc is then doubled. Through what distance, the coin should be shifted towards the centre, so that the coin will just slip? |
| A. | 2 cm |
| B. | 4 cm |
| C. | 6 cm |
| D. | 16 cm |
| Answer» B. 4 cm | |
| 168. |
A car is moving on a circular path and takes a turn. If R1 and R2 are the reactions on the inner and outer wheels respectively, then |
| A. | R1 > R2 |
| B. | R1 = R2 |
| C. | R1 = >R2 |
| D. | R1 < R2 |
| Answer» E. | |
| 169. |
A car sometimes overturns while taking a turn. When it overturns, it is |
| A. | the outer wheel which leaves the ground first |
| B. | the inner wheel which leaves the ground first |
| C. | either inner wheel or the outer wheel leaves the ground |
| D. | both the wheel leave the ground simultaneously |
| Answer» C. either inner wheel or the outer wheel leaves the ground | |