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Showing 176 to 200 of 1648 questions (page 8 of 66).

176. Angular velocity and linear velocity for a particle in circular motion are related by

A. v = omega/r B. v = r omega C. omega = v r D. v = omega r2 E. omega = v2/r

177. The terminal velocity of a small sphere falling through a viscous fluid is proportional to

A. r B. r2 C. r3 D. 1/r E. 1/r2

178. Bernoulli's equation is a statement of the conservation of

A. mass B. momentum C. energy D. charge E. angular momentum

179. A Venturi meter is used to measure

A. density of a liquid B. viscosity of a liquid C. speed of fluid flow D. surface tension E. atmospheric pressure

180. The SI unit of coefficient of viscosity is

A. N m-2 B. N s m-2 C. N m s-1 D. kg m-1 E. N m

181. According to Torricelli's theorem, the speed of efflux of a liquid from a small hole at depth h below the free surface is

A. sqrt(gh) B. sqrt(2gh) C. 2gh D. gh E. sqrt(gh/2)

182. The equation of continuity for an incompressible fluid states that

A. P + rho g h is constant B. A v is constant C. P v is constant D. A/v is constant E. rho v is constant

183. In simple harmonic motion, the acceleration of the body is

A. constant B. directly proportional to displacement and in the same direction C. directly proportional to displacement and opposite in direction D. inversely proportional to displacement E. zero at the extreme positions

184. The time period of a simple pendulum is proportional to

A. L B. L2 C. sqrt(L) D. 1/L E. 1/sqrt(L)

185. The time period of a mass m attached to a spring of spring constant k is

A. 2 pi sqrt(k/m) B. 2 pi sqrt(m/k) C. 2 pi m k D. (1/2 pi) sqrt(m/k) E. 2 pi sqrt(mk)

186. The total energy of a body executing SHM is proportional to

A. amplitude B. square of the amplitude C. square root of the amplitude D. inverse of the amplitude E. displacement

187. The phase difference between displacement and acceleration in SHM is

B. 90 degrees C. 180 degrees D. 45 degrees E. 270 degrees

188. In SHM, kinetic energy is maximum at

A. the extreme position B. the mean position C. one quarter of the amplitude D. half of the amplitude E. all positions equally

189. If the length of a simple pendulum is made four times, its time period becomes

A. half B. double C. four times D. one fourth E. unchanged

190. The speed of sound in dry air at 0 degrees Celsius is about

A. 300 m s-1 B. 332 m s-1 C. 343 m s-1 D. 1500 m s-1 E. 5000 m s-1

191. The number of beats heard per second when two tuning forks of frequencies 256 Hz and 260 Hz sound together is

A. 2 B. 4 C. 8 D. 256 E. 516

192. The distance between two consecutive nodes in a stationary wave is

A. lambda B. lambda/2 C. lambda/4 D. 2 lambda E. lambda/8

193. Newton's formula for the speed of sound in air was corrected by Laplace by assuming the process is

A. isothermal B. adiabatic C. isochoric D. isobaric E. irreversible

194. The fundamental frequency of an open organ pipe of length L is

A. v/4L B. v/2L C. v/L D. 2v/L E. 4v/L

195. The speed of sound in a gas is proportional to

A. T B. T2 C. sqrt(T) D. 1/T E. 1/sqrt(T)

196. The apparent change in the frequency of sound due to relative motion between source and observer is called

A. interference B. diffraction C. the Doppler effect D. resonance E. polarization

197. A stationary wave is produced when two waves of equal frequency and amplitude travel

A. in the same direction B. in opposite directions C. at right angles D. with different speeds E. with a phase difference of 90 degrees

198. In Young's double slit experiment, the fringe spacing is given by

A. d lambda / L B. lambda L / d C. d L / lambda D. lambda / dL E. L / d lambda

199. Polarization of light establishes that light waves are

A. longitudinal B. transverse C. mechanical D. stationary E. non-periodic

200. The grating equation for normal incidence is

A. d sin theta = n lambda B. d cos theta = n lambda C. d tan theta = n lambda D. sin theta = n d lambda E. d sin theta = lambda / n

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