Question # 1

Ultrasound waves carry energy:

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Less

More

Equal

None of these

Big unit of capacitance is:

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Farad

Volt

watt

coulomb

The speed of sound in iron at 25°C is:

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5950 m/sec

5900 m/sec

6950 m/sec

6940 m/sec

The frequency of silent whistle is:

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20,000 Hz – 25000Hz

2000 Hz – 2500Hz

200 KHz – 2000 Hz

25000 KHz

The intensity level of whispering is:

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20 dB

30 dB

40 dB

50 dB

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

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4-times

1/4th

Double

Half

Which frequency is used by elephants to communicate with each other:

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Zero frequency

Low frequency

Medium frequency

High frequency

An object gains excess negative charge after being rubbed against another object, which is:

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Neutral

Negatively charged

Charged

Either, a,b,and c

1 bel=

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0.1 dB

10 dB

100 dB

0.01 dB

Mathematical formula of capacitance of a capacitor is:

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C = QV

C = Q/V

C = V/Q

C = V2/Q

The SI the unit of charge is:

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Jpi;e

Volt

Coulomb

Watt

According to Coulomb's law , what happens to the attraction of two oppositely charged objects as their distance of separation increases?

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Increase

Decreased

remain unchanged

can not be determined

If we double the distance between two charges, what will be the change in the force between them?

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Half

Double

One fourth

Four times

The pitch of a sound is most closely related to its:

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Wave form

Period

Amplitude

Frequency

The speed of sound was accurately measured in:

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1736

1737

1738

1739

Capacitance is defined as:

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VC

Q/V

QV

V/Q

The speed of sound in air at 100°C is:

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380ms-1

382ms-1

386ms-1

300ms-1

In case of OR and AND operation, if switches s₁ and s₂ both are open then lamp is:

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On

Off

Sometimes on and sometimes off

Neither on nor off

1 volt is equal to:

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JC

JC^-1

JC^-2

JC^-3

Bats can hear sound of frequency up to:

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100,000Hz

25000Hz

120, 000Hz

1000Hz

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