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.
| 101. |
The time required for one complete revolution or cycle of the circular motion is called? |
| A. | Time pass |
| B. | Time piece |
| C. | Time period |
| D. | Time duration |
| Answer» D. Time duration | |
| 102. |
Centripetal acceleration is the acceleration which is always directed towards the centre of the? |
| A. | Parallelogram |
| B. | square |
| C. | ellipse |
| D. | circle |
| Answer» E. | |
| 103. |
The word centripetal is derived from two Greek words meaning? |
| A. | Leaving the centre. |
| B. | Seeking the situation. |
| C. | Seeking the centre. |
| D. | Touching the centre. |
| Answer» D. Touching the centre. | |
| 104. |
A projectile is fired with the initial velocity of 90m/s to hit a ground level target. Its maximum horizontal range will be? |
| A. | 826.5 m |
| B. | 19.2 m |
| C. | 800 m |
| D. | 81 m |
| Answer» B. 19.2 m | |
| 105. |
If the time interval t is very small (Δt—>0) then the angle through which the particle P (rotating along a circular path) moves is also very small and therefore the ratio Δθ/Δt |
| A. | Tangential angular speed. |
| B. | Instantaneous angular speed. |
| C. | Average angular speed. |
| D. | Uniform angular speed. |
| Answer» C. Average angular speed. | |
| 106. |
The acceleration produced by virtue of the changing direction of the velocity of an object moving in a circular path is called? |
| A. | Linear acceleration |
| B. | centripetal acceleration |
| C. | centrifugal acceleration |
| D. | Instantaneous acceleration |
| Answer» C. centrifugal acceleration | |
| 107. |
The tangential velocity of a point on the rotating object is? |
| A. | increases as we move outward from the centre of rotation |
| B. | decreases as we move outward from the centre of rotation |
| C. | remain constant |
| D. | increases as we move inward from the instantaneous location towards the centre of rotation. |
| Answer» B. decreases as we move outward from the centre of rotation | |
| 108. |
A body of mass 100 gram, tied at the end of a string of length 3 m rotates in a vertical circle and is just able to complete the circle. If the tension in the string at its lowest point is 3.7 N, then its angular velocity will be ______ (g = 10 m/s2) |
| A. | 3 rad/s |
| B. | 2 rad/s |
| C. | 4 rad/s |
| D. | 1 rad/s |
| Answer» B. 2 rad/s | |
| 109. |
A body of mass 500 gram is rotating in a vertical circle of radius 1 m. What is the difference in its kinetic energies at the top and the bottom of the circle? |
| A. | 9.8 J |
| B. | 19.8 J |
| C. | 4.9 J |
| D. | 2.8 J |
| Answer» B. 19.8 J | |
| 110. |
A body is traveling in a circle at constant speed. It |
| A. | has an outward radial acceleration |
| B. | has an inward acceleration |
| C. | has no acceleration |
| D. | has constant velocity. |
| Answer» C. has no acceleration | |
| 111. |
The centripetal component of acceleration arises when? |
| A. | The direction propagation is changed. |
| B. | The direction of motion is changed. |
| C. | The direction of projectile is changed. |
| D. | The direction of gravity is changed. |
| Answer» C. The direction of projectile is changed. | |
| 112. |
A body is moving along a circular path with variable speed. It has |
| A. | a tangential acceleration |
| B. | a radial acceleration |
| C. | zero acceleration |
| D. | both tangential and radial accelerations |
| Answer» E. | |
| 113. |
A body of mass m performing UCM with frequency n along the circumference of circle having radius r, force is given by |
| A. | π2n2mr |
| B. | 4π2n2m |
| C. | 1/2 πnm2 |
| D. | 4πnm2 |
| Answer» C. 1/2 πnm2 | |
| 114. |
A body is allowed to slide on a frictional less track from rest under-gravity. The track ends in a circular loop of diameter D. What should be the minimum height of the body in terms of D, so that it may successfully complete the loop? |
| A. | D |
| B. | 5/4 D |
| C. | 2D |
| D. | 4/5 D |
| Answer» C. 2D | |
| 115. |
The tangential component of acceleration arises when? |
| A. | speed of the object is constant. |
| B. | speed of the object is changed. |
| C. | speed of the object is maximum. |
| D. | speed of the object is minimum. |
| Answer» C. speed of the object is maximum. | |
| 116. |
A body is moving along a circle with an increasing speed. It possesses? |
| A. | No acceleration |
| B. | tangential acceleration only (ar) |
| C. | centripetal acceleration only (ac) |
| D. | both tangential and centripetal acceleration (ar and ac) |
| Answer» E. | |
| 117. |
The tangential component and centripetal component of acceleration are? |
| A. | Similar to each other |
| B. | Parallel to each other. |
| C. | Perpendicular to each other. |
| D. | Equal to each other. |
| Answer» D. Equal to each other. | |
| 118. |
The unit of angular acceleration in S.I units is? |
| A. | rad.s-2 |
| B. | rad.s-1 |
| C. | rad.s2 |
| D. | rad2.s |
| Answer» B. rad.s-1 | |
| 119. |
When angular velocity changes with respect to time then? |
| A. | an angular acceleration is produced |
| B. | a linear acceleration is produced |
| C. | a linear velocity is produced |
| D. | it constitute a couple |
| Answer» B. a linear acceleration is produced | |
| 120. |
One degree (1°) is equal to? (a) (b) (c) (d) |
| A. | 7.1745 rad |
| B. | 0.01745 rad |
| C. | 0.001745 rad |
| D. | 0.1745 rad |
| Answer» C. 0.001745 rad | |
| 121. |
When an object rotates about a fixed axis, every point in the object moves in a? |
| A. | ellipse whose center is on the axis of rotation |
| B. | straight line |
| C. | circle whose center is on the axis of rotation |
| D. | parabolic path |
| Answer» D. parabolic path | |
| 122. |
In projectile a body moves with? |
| A. | constant horizontal component of velocity |
| B. | both changing horizontal and vertical components of velocity |
| C. | horizontal component changing but vertical component of velocity constant. |
| D. | constant vertical component of velocity |
| Answer» B. both changing horizontal and vertical components of velocity | |
| 123. |
The angular velocity depends upon the rate of change of the? |
| A. | Angular acceleration |
| B. | Angular Distance. |
| C. | Angular Displacement. |
| D. | torque |
| Answer» D. torque | |
| 124. |
A car traveling at 70 Km/ hr east turns south without a change in speed. The car is moving with? |
| A. | acceleration |
| B. | uniform velocity |
| C. | None of these |
| D. | average velocity |
| Answer» B. uniform velocity | |
| 125. |
The work done by the centripetal force is always? |
| A. | Negative |
| B. | positive |
| C. | Zero |
| D. | None of these |
| Answer» D. None of these | |
| 126. |
The rate of change of angular velocity with respect to time defines? |
| A. | Angular momentum. |
| B. | Angular displacement. |
| C. | Angular acceleration. |
| D. | None of these. |
| Answer» D. None of these. | |
| 127. |
One radian is equal to ? |
| A. | 57.3° |
| B. | 59.3° |
| C. | 53.7° |
| D. | 57.7° |
| Answer» B. 59.3° | |
| 128. |
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion takes place in a plane. It follows that |
| A. | its velocity is constant |
| B. | its acceleration is constant |
| C. | its motion is circular |
| D. | its motion is linear |
| Answer» D. its motion is linear | |
| 129. |
A particle of mass m is moving in a horizontal circle of radius R with uniform speed v. When it moves from one point to a diametrically opposite point its |
| A. | momentum changes by 2 Mv2 |
| B. | kinetic energy changes by Mv2 |
| C. | kinetic energy changes by Mv2/4 |
| D. | momentum does not change |
| Answer» E. | |
| 130. |
A particle is performing a U.C.M. Which is the wrong statement regarding its motion? |
| A. | The velocity and acceleration vectors are perpendicular to each other |
| B. | The acceleration vector is tangential to the circle |
| C. | The acceleration vector is directed towards the centre of the circle |
| D. | The velocity vector is tangential to the circle |
| Answer» C. The acceleration vector is directed towards the centre of the circle | |
| 131. |
A small body attached at the end of an inextensible string completes a vertical circle, then its |
| A. | total mechanical energy remains constant |
| B. | angular velocity remains constant |
| C. | angular momentum remains constant |
| D. | linear momentum remains constant |
| Answer» B. angular velocity remains constant | |
| 132. |
A satellite has mass m speed v and radius r, the force acting on it is: |
| A. | mrv2 |
| B. | mv2/r2 |
| C. | zero |
| D. | mv2/r |
| Answer» E. | |
| 133. |
A pulley one metre in diameter rotating at 600 r.p.m. is brought to rest in 80 sec. by a constant force of friction on its shaft. How many revolutions does it makes before coming to rest? |
| A. | 200 |
| B. | 300 |
| C. | 400 |
| D. | 500 |
| Answer» D. 500 | |
| 134. |
A particle revolves round a circular path. The acceleration of the particle is |
| A. | along the tangent |
| B. | along the radius |
| C. | along the circumference of the circle |
| D. | zero |
| Answer» C. along the circumference of the circle | |
| 135. |
A particle moving in a circle of radius 25 cm at 2 revolutions per second. The acceleration of the particle is S.I. unit is |
| A. | 4π2 |
| B. | 3π2 |
| C. | 2π2 |
| D. | π2 |
| Answer» B. 3π2 | |
| 136. |
A stone attached to a rope of length l = 80 cm is rotated with a speed of 240 r.p.m. At the moment when the velocity is directed vertically upwards, the rope breaks. To what height does the stone rise further? |
| A. | 1.2 m |
| B. | 20.6 m |
| C. | 24.9 m |
| D. | 41.2 m |
| Answer» C. 24.9 m | |
| 137. |
A motor cyclist moving with a velocity of 75 km/hr on a flat road takes a turn on the road at a point where the radius of curvature of the road is 20 m. If the g is 10 m/s2 the maximum angle of banking with vertical for no skidding is |
| A. | tan-1 (6) |
| B. | tan-1 (2) |
| C. | tan-1 (4) |
| D. | tan-1 (12) |
| Answer» C. tan-1 (4) | |
| 138. |
A fighter aeroplane flying in the sky dives with a speed of 360 km/hr in a vertical circle of radius 200 m. Weight of the pilot sitting in it is 75 kg. What will be the value of force with which the pilot presses his seat when the aeroplane is at highest position (g = 10 m/s2) |
| A. | 1500 N |
| B. | 3000 N |
| C. | 300 N |
| D. | (75 ' g)N |
| Answer» B. 3000 N | |
| 139. |
A mass of 5 kg is tied to a string of length 1.0 m and is rotated in vertical circle with a uniform speed of 4 m/s. The tension in the string will be 130 N when the mass is at (g = 10 m/s2) |
| A. | highest point |
| B. | mid way |
| C. | bottom |
| D. | cannot be justified |
| Answer» D. cannot be justified | |
| 140. |
A man whirls a stone of mass 250 gram, tied at the end of a string of length 2 m in a horizontal circle and at a height of 5 m from the ground. The string breaks and the stone flies off tangenitially and strikes the ground at a horizontal distance of 10 m from the man. What was the magnitude of the centripetal acceleration of the stone, when it was moving in the circle? (g = 10 m/s2) |
| A. | 50 m/s2 |
| B. | 25 m/s2 |
| C. | 40 m/s2 |
| D. | 30 m/s2 |
| Answer» B. 25 m/s2 | |
| 141. |
A cyclist goes round a circular path of circumference 343 m in s. The angle made by him, with the vertical is |
| A. | 42° |
| B. | 43° |
| C. | 44° |
| D. | 45° |
| Answer» E. | |
| 142. |
A mass suspended on a frictional less horizontal surface. It is attached to a string and rotates about a fixed centre at an angular velocity w0. If length of the string and angular velocity are doubled the tension in the string which was initially T0 is now |
| A. | 8 T0 |
| B. | T0/2 |
| C. | 4 T0 |
| D. | T0 |
| Answer» B. T0/2 | |
| 143. |
A frictional track ABCDE ends in a circular loop of radius R, body slides down the track from point A which is at a height h of 5 cm. Maximum value of R for the body to successfully complete the loop is: |
| A. | 5 cm |
| B. | 10/3 cm |
| C. | 2 cm |
| D. | 15/4 cm |
| Answer» D. 15/4 cm | |
| 144. |
A cyclist turns around a curve at 15 miles per hour. If he turns at double the speed, the tendency of overturn is |
| A. | quadrupled |
| B. | halved |
| C. | unchanged |
| D. | doubled |
| Answer» B. halved | |
| 145. |
A cyclist is moving in a circular track of radius 80 m, with a velocity of 36 km/hour. In order to keep his balance, he has to lean inwards from the vertical through an angle q. If g = 10 m/s2, then q is given by |
| A. | tan-1 (2) |
| B. | tan-1 (4) |
| C. | tan-1 (1/4) |
| D. | tan-1 (1/8) |
| Answer» E. | |
| 146. |
A metal sphere of mass 0.1 kg is attached to an inextensible string of length 130 cm whose upper end is fixed to the rigid support. If the sphere is made to describe a horizontal circle of radius 50 cm, the time for its one revolution is near about |
| A. | 1.2 sec |
| B. | 3 sec |
| C. | 1.5 sec |
| D. | 2.2 sec |
| Answer» E. | |
| 147. |
A motor cyclist loops a vertical circular loop of diameter 18 m, without dropping down, even at the highest point of the loop. What should be his minimum speed at the lowest point of the loop? |
| A. | 10 m/s |
| B. | 21 m/s |
| C. | 30 m/s |
| D. | 16 m/s |
| Answer» C. 30 m/s | |
| 148. |
The range of the projectile depends on the square of the initial velocity and? |
| A. | sine of twice the projection angle θ |
| B. | cot of twice the projection angle θ |
| C. | sine of thrice the projection angle θ |
| D. | cosine of twice the project angle θ |
| Answer» B. cot of twice the projection angle θ | |
| 149. |
Small angle produces? |
| A. | straight trajectory |
| B. | steep trajectory |
| C. | high trajectory |
| D. | flat trajectory |
| Answer» E. | |
| 150. |
Large angle produces? |
| A. | straight trajectory |
| B. | curve trajectory |
| C. | high trajectory |
| D. | flat trajectory |
| Answer» D. flat trajectory | |