Who discovered the inverse square law for gravity ?
Who discovered the inverse square law for gravity ?
A. Einstein
B. Galileo
C. Newtons
D. Plank
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Reverse process of photoelectric effect is_______________?
Reverse process of photoelectric effect is_______________?A. pair production
B. Compton effect
C. annihilation of matter
D. X-rays productionIf the length of the second pendulum becomes four times, then its time period will become________________?
If the length of the second pendulum becomes four times, then its time period will become________________?A. 4 times
B. 6 times
C. 8 times
D. 2 timesA satellite moving around the earth constitutes______________?
A satellite moving around the earth constitutes______________?A. An inertial frame of reference
B. Non-inertial frame
C. Neither inertial nor non-inertial
D. Both inertial and non-inertialWhen a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by______________?
When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by______________?A. Mass of a body
B. Velocity of body
C. The tension in the string
D. Centripetal accelerationDuring fusion of hydrogen into helium________________?
During fusion of hydrogen into helium________________?A. Energy is absorbed
B. Energy is released
C. Mass is increased due to energy absorption
D. Mass is reduced due to the energy releasedCompton effect proves the________________?
Compton effect proves the________________?A. Photon theory of light
B. Dual nature of light
C. Wave nature of light
D. Uncertain nature of light