Physics MCQS

271. A couple produces:
A. Purely linear motion
B. Purely rotational motion
C. Linear and rotational motion
D. No Motion

272. The rate at which the angular displacement is changing with time is called:
A. Angular acceleration
B. Angular Velocity
C. Average angular velocity
D. None of these

273. S.I unit of angular velocity is:
A. Radian per second
B. Revolution per minute
C. Degree per second
D. None of these

274. Angular acceleration is a:
A. Scalar quantity
B. Variable quantity
C. Vector quantity
D. None of these

275. The units of angular acceleration are:
A. Radian
B. Radian per second
C. Radian per second²
D. None of these

276. The axis of rotation of an object will not change its orientation unless:
A. Internal torque acts
B. Internal torque acts in one direction
C. External torque acts
D. None of these

277. The linear velocity in a circle is called:
A. Linear velocity
B. Angular velocity
C. Tangential velocity
D. None of these

278. The quantum number which is not involved in describing the orbit of an atom electron is?
(A) n
(B) m
C) s
(D) l

279. Heaviest class of elementary particles consists of?
(A) Leptons
B) Baryons
(C) Photons
(D) Mesons

280. Some amount of heat given to gas under isothermal conditions will result in?
(A) Rise in temperature
(B) An increase in internal energy
(C) Doing external work and change in temperature
D) Doing external work