Physics MCQs

Page No. 28

Minimum number of communication satellites required to cover the whole earth is______________?


a4


b3


c2


d 5


View Answer 3

A satellite moving around the earth constitutes______________?


aAn inertial frame of reference


bNon-inertial frame


cNeither inertial nor non-inertial


dBoth inertial and non-inertial


View Answer Non-inertial frame

The planet nearest to the earth is______________?


aVenus


bMercury


cUranus


dSun


View Answer Venus

Who discovered the inverse square law for gravity ?


aEinstein


bGalileo


c Newtons


dPlank


View Answer Newtons

A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is_______________?


amg


bmg – ma


cmg + ma


dmg – ma


View Answer mg + ma

Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be_______________?


aπR


b2πR


c0


d4πR


View Answer 0

If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is________________?


aAt the highest point


bAt the lowest point


cAt any point during motion


dAt the point where gravity is not acting


View Answer At the lowest point

What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ?


a1N


b 10N


c2N100N


d100N


View Answer 1N

The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is________________?


aπ


b


c


d12π


View Answer 12π

The angular speed of seconds hand of a watch in rads-1 is______________?


aπ


b π/2


cπ/30


dπ/180


View Answer π/30

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