Physics MCQs

Page No. 31

According to Einstein, the gravitational interaction is possible between_______________?


amaterial objects only

✓


bmaterial objects and electromagnetic radiation only

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c electromagnetic radiations

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dnone of the above

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


a42000km

✓


b36000km

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c24000 km

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d18000 km

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View Answer 42000km

Geostationary satellite completes one rotation around the earth in_______________?


a3 hours

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b6 hours

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c 12 hours

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d24 hours

✓


View Answer 24 hours

The critical speed of an artificial satellite is_______________?


a 8 Kms-1

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b8.1 Kms-1

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c7.9 Kms-1

✓


d8 ms-1

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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

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bK.E hoop = 2K.E disc

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

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dK.E hoop = 4K.E disc

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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

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cdouble than its translational K.E

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dfour times than its translational K.E

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View Answer its translational K.E

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


a1mm

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b10km

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c1000um

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dBoth A and B

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View Answer 1000um

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


a76.8

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b 77

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c76.9

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dNone of these

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View Answer 77

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


a4

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b3

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c2

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d None of these

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View Answer 4

To reduce the uncertainty in the timing experiment______________?


aHighly precise instrument

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b Conduct at room temperature

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c Count number of vibration

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dBoth a and C

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View Answer Both a and C

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