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Tuesday 8 March 2016

Physics MCQs Part 17

physics mcqs with answer
161. Following pairs of physical quantities have identical dimensions?
A. Moment of a force and Angular Momentum
B. Work and Energy
C. Torque and Energy
D. None of these

162. In SI system the correct unit of luminous intensity is.?
A. Kelvin
B. Lumen
C. Candela
D. Lux

163. In SI system the correct unit of amount of substance is.?
A. Mole
B. Liter
C. Gram
D. Milliliter

164. Sun and the other stars are virtuously huge nuclear explosion chambers producing a large amount of head and light yet, we do not hear any of the explosions because.?
A. Heat and light are electromagnetic
B. Sound waves get attenuated completely before they reach the earth
C. The outer space is an absolute vacuum
D. None of above

165. The advantage of AC over DC is that.?
A. its generation coats much less
B. it contain more electrical energy
C. it can be transmitted over long distances with minimum power loss it is free
D. from voltage fluctuation

166. A man is at rest in the middle of and on perfectly frictionless ice. He can get himself to the shore by taking the help of Newton's
A. I law
B. II law
C. III law
D. None of above

167. Which one Air bubble in water shines because of the phenomenon of.?
A. Refraction
B. Dispersion
C. Diffraction
D. Total internal reflection

 168. The action and reaction forces referred in Newton's third law of motion.?
A. Must act upon the same body
B. Need not to be equal in magnitude but must have the same line of action
C. Must act upon different bodies
D. None of above

169. The quantity e 2/hc , where 'e' is the electronic charge 'h' is the Planck's constant and 'c' is the velocity of light.?
A. Has the dimension of mass
B. Is dimensionless
C. Has the dimension of length
D. Has the dimension of time

170. When a body undergoes an acceleration.?
A. It falls toward the earth
B. Its velocity increases
C. A force acts upon it
D. Its speed increases

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