1st Semester Physics Important Questions. We covered all the 1st Semester Physics Important Questions in this post for free so that you can practice well for the exam.
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1st Semester Physics Important Objective Questions for Students
A wheel has a mass of 50 kg and a radius of gyration of 1 meter. It is brought to rest from a speed of 1800 rpm in 30 seconds by uniform retarding torque. The torque is:
a. 314 N-m
b. 530 N-m
c. 613 N-m
d. 222 N-m
Option a – 314 N-m
A flywheel is in the form of a uniform circular disc with a radius of 1 meter and a mass of 2 kg. The work done on the flywheel to increase its frequency of rotation from 5 to 10 rev/sec is:
a. 7489 J
b. 1479 J
c. 513 J
d. 214 J
Option b – 1479 J
If the radius of the Earth, assumed to be a perfect sphere, suddenly shrinks to half its present value while the mass of the Earth remains unchanged, what will be the duration of one day?
a. 2 hours
b. 4 hours
c. 6 hours
d. 8 hours
Option c – 6 hours
A particle is at rest in a rotating frame. The pseudo force acting on the particle in the rotating frame is:
a. Zero
b. Only the centrifugal force
c. Only the Coriolis force
d. The combination of both centrifugal and Coriolis forces
Option b – Only the centrifugal force
We covered all the 1st semester physics important questions above in this post for free so that you can practice well for the exam.
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