Rest mass energy of electron is
1.02MeV
0.511KeV
0.511MeV
2.02MeV
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When K.Emax of photoelectrons is zero then frequency of incident photon relative to threshold frequency is
less
equal
greater
small
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Mass of 700N man moving in car at 66km/h is
70kg
100kg
infinite
zero
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An inertial frame of reference is frame
in which first law of motion is valid
in which law of inertia is valid
which is not moving with uniform velocity
both a and b
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In photocell cesium, coated oxidized silver cathode emits electrons for
visible light
ultraviolet
infrared light
x-rays
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