Question # 1

The colour of live wire is:

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Black or blue

Green or yellow

White or grey

Red or brown

The energy is transferred from one place of another:

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through matter

through waves

both a and b

through vacuum

The speed of sound in air at 0°C is:

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331ms^-1

376ms^-1

231ms^-1

386ms^-1

The instrument which is used to display the magnitude of changing electric current is called:

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Evacuated tube

Cathode rays oscilloscope

Television tube

Picture tube

According to Fleming's left hand rule the direction of magnetic field is indicated by:

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Thumb

Forefinger

Middle finger

Right hand rule

The output of OR gate would be '0' When:

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Both of its inputs are zero

One of its two inputs is zero

Both of its inputs ar 1

Any one of its inputs is 1

High pitch means:

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High wavelength

High frequency

High time period

High energy

Which of the following devices can be used to produce both a transverse and longitudinal waves:

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A string

A ripple tank

A helical spring (slinky)

A tuning fork

The speed of sound in are water at 25°C is:

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1530ms-1

1531ms-1

1560ms-1

1570ms-1

Speed of light in air is ms^-1

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3 x 10⁸

3 x 10¹¹

3 x 10⁵

340

Specific resistance of silver = ________ x 10^-sOhm-meter

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5.25

2.75

1.69

1.62

The power of small fan is:

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40 W

50 W

60 W

80 W

Time period is reciprocal of:

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Frequency

Cycle

Wavelength

Amplitude

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