Question # 1

The intensity level of train siren is:

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150 dB

100 dB

130 dB

120 dB

One micro coulomb charge is equal to:

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10^-3 C

10³C

10⁶C

10^-6C

If we double the distance between two charges, then force becomes

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4-times

1/4th

Double

Half

The frequency of silent whistle is:

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20,000 Hz – 25000Hz

2000 Hz – 2500Hz

200 KHz – 2000 Hz

25000 KHz

Level of noise recommended in eight, hour work day:

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80-90 dB

80-85- dB

85-90 dB

90-95 dB

The coulomb's law is valid for the charges which are:

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moving and point charges

moving and non-point charges

stationary and pont charges

stationary and large size charges

The intensity level of whispering is:

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20 dB

30 dB

40 dB

50 dB

SI unit of electric potential is:

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Watt

Volt

Coulomb

Joule

Old people cannot hear sound above than:

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1000 Hz

15000 Hz

20000 Hz

Mathematical formula of capacitance of a capacitor is:

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C = QV

C = Q/V

C = V/Q

C = V2/Q

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral charge

Repels a neutral chage

To hear echoes, the minimum distance of the obstacle from source of sound should be:

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10m

15m

17m

20m

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Physics 10th Class English Medium Unit 4 Online Test MCQs With Answers

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