Explore topic-wise MCQs in Physics.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

1.

A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/sec. A plumb bob is suspended from the roof of the car by a light rigid rod of length 1.00 m. The angle made by the rod with track is [IIT 1992]

A. Zero
B. \[{{30}^{o}}\]
C. If assertion is true but reason is false.
D. \[{{60}^{o}}\]
Answer» D. \[{{60}^{o}}\]
Discussion
2.

A tube of length \[L\] is filled completely with an incompressible liquid of mass \[M\] and closed at both the ends. The tube is then rotated in a horizontal plane about one of its ends with a uniform angular velocity \[\omega \]. The force exerted by the liquid at the other end is   [IIT 1992]

A. \[\frac{ML{{\omega }^{2}}}{2}\]
B. \[ML{{\omega }^{2}}\]
C. If assertion is true but reason is false.
D. \[\frac{M{{L}^{2}}{{\omega }^{2}}}{2}\]  
Answer» B. \[ML{{\omega }^{2}}\]
Discussion
3.

A particle is moving eastwards with velocity of 5 m/s. In 10 sec the velocity changes to 5 m/s northwards. The average acceleration in this time is [IIT 1982; AFMC 1999; Pb PET 2000; JIPMER 2001, 02]

A. Zero
B. \[\frac{1}{\sqrt{2}}\,\,m\text{/}{{s}^{\text{2}}}\] toward north-west
C. If assertion is true but reason is false.
D. \[\frac{1}{2}\,\,m\text{/}{{s}^{\text{2}}}\]toward north-west
Answer» C. If assertion is true but reason is false.
Discussion
4.

Assertion    :     When the velocity of projection of a body is made n times, its time of flight becomes n times.  Reason : Range of projectile does not depend on the initial velocity of a body.

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.  
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.  
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.  
E. If assertion is false but reason is true.
Answer» D. If the assertion and reason both are false.  
Discussion
5.

  Assertion    :     Horizontal range is same for angle of projection q and (90 ? q).   Reason : Horizontal range is independent of angle of projection.    

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.  
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.  
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.  
E. If assertion is false but reason is true.
Answer» D. If the assertion and reason both are false.  
Discussion
6.

  Assertion    :     Two similar trains are moving along the equatorial line with the same speed but in opposite direction. They will exert equal pressure on the rails. Reason : In uniform circular motion the magnitude of acceleration remains constant but the direction continuously changes.

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.  
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.  
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.  
E. If assertion is false but reason is true.    
Answer» F.
Discussion
7.

  Assertion    :     If the speed of a body is constant, the body cannot have a path other than a circular or straight line path. Reason : It is not possible for a body to have a constant speed in an accelerated motion.

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.  
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.  
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.  
E. If assertion is false but reason is true.
Answer» E. If assertion is false but reason is true.
Discussion