Question # 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

The symbol of atomic mass number is:

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A

X

N

Z

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

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380ms-1

382ms-1

386ms-1

300ms-1

The converter of digital to analogue signal is:

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ADC

DAC

DATC

DTC

Ultrasound waves carry energy:

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Less

More

Equal

None of these

The S.I unit of potential difference is:

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Ampere

Coulomb

Volt

Watt

The product of frequency (f) and wavelengthλ is equal to:

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Time period

Amplitude

Wave speed

Wave energy / frequency

Thye Water waves obey the laws of

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Reflection

Refraction

Diffraction

All of these

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

Aperture

Boolean expression for AND operation is:

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X = A̅

X = A + B

X = A . B

X = A̅B̅

In OR operation inputs are connected as:

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Series

Parallel

Both series or parallel

None of these

The resistance of voltmeter is:

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zero

low

Very high

10Ω

The intensity level of whispering is:

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20 dB

30 dB

40 dB

50 dB

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