Physics MCQs

Page No. 31

According to Einstein, the gravitational interaction is possible between_______________?


amaterial objects only


bmaterial objects and electromagnetic radiation only


c electromagnetic radiations


dnone of the above



The radius of geostationary orbit from the centre of the earth is nearly______________?


a42000km


b36000km


c24000 km


d18000 km


View Answer 42000km

Geostationary satellite completes one rotation around the earth in_______________?


a3 hours


b6 hours


c 12 hours


d24 hours


View Answer 24 hours

The critical speed of an artificial satellite is_______________?


a 8 Kms-1


b8.1 Kms-1


c7.9 Kms-1


d8 ms-1


View Answer 7.9 Kms-1

A hoop and disc have same mass and radius. Their rotational K.E are related by an equation______________?


aK.E hoop = K.E disc


bK.E hoop = 2K.E disc


cK.E hoop = 1/2K.E disc


dK.E hoop = 4K.E disc


View Answer K.E hoop = 2K.E disc

The rotational K.E of the hoop is equal to the______________?


aits translational K.E


bhalf than its translational K.E


cdouble than its translational K.E


dfour times than its translational K.E


View Answer its translational K.E

Which of the following is not a correct representation method for prefixes______________?


a1mm


b10km


c1000um


dBoth A and B


View Answer 1000um

The number 76.85 is rounded off up to two significant figures as_____________?


a76.8


b 77


c76.9


dNone of these


View Answer 77

The number of significant figures in the length of a bar 6200mm measured by meter rod is_______________?


a4


b3


c2


d None of these


View Answer 4

To reduce the uncertainty in the timing experiment______________?


aHighly precise instrument


b Conduct at room temperature


c Count number of vibration


dBoth a and C


View Answer Both a and C

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