Physics MCQs

Page No. 19

The linear momentum of an X-ray photon of wavelength 0.1A is_______________?


a 6.625x1023N-s


b66.25x1023N-s


c662.5x1023N-s


ddata is insufficient


View Answer 6.625x1023N-s

Linear momentum of a photon is_______________?


azero


b hv/c2


chv/c


dc2/hv


View Answer zero

An observer shoots parallel to a meter stick at very high (relativistic) speed and finds that the length of meter stick is________________?


a greater than one meter


bless than one meter


cone meter


d a foolish question


View Answer less than one meter

Mark the wrong statement ?


aa frame of reference which is either at rest or moves with a constant velocity is called an inertial frame of reference


ban un-accelerated frame of reference is called an inertial frame of reference


call the frames of reference in uniform rectilinear motion are equivalent


dNewtons laws of motion are valid in an accelerated (non inertial) frame of reference



0.001 kg mass will be equivalent to_________________?


a 2.50 GWh


b25.00 GWh


c0.26 GWh


d250 GWh


View Answer 25.00 GWh

Which one of the following radiations has the strongest photon?


aT.V waves


bMicrowaves


cX-rays


dγ-rays


View Answer γ-rays

The relativistic energy E is equivalent to relativistic mass given by_______________?


aEc2


bE/c2


cE/c


dc2/E


View Answer E/c2

The energy absorbed by a body is __________________ at resonance?


aMaximum as well minimum


bMinimum only


cMaximum only


d0


View Answer Maximum only

In case of a simple pendulum, the cause of damping is__________________?


a Drag force of air


bGravity


cTension in the string


dNone of these


View Answer Drag force of air

A cup of milk is placed in a microwave oven. Tell which statements is false. (1) Milk will be heated up only. (2) Cup will remain cool. (3) Both cup and mild will get hot ?


aNone


b1


c2


d3


View Answer 3

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