Question # 1

In mathematical form of Ohm's law, "R" is:

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Resistance

Specific resistance

Resistor

Resistivity

The S.I unit of electric power is:

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Volt

Watt

Ampere

Joule

An object is placed at the Centre of curvature of a concave mirror. The image produced by the mirror is located:

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Out beyond the centre of curvature

At the centre of curvature

Between the centre of curvature and the focal point

At the focal point

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

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5.25

2.75

1.69

1.62

AND operation is represented by:

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Dot (.)

Addition (+)

Division (÷)

Minus (-)

Battery converts chemical energy into which energy:

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Mechanical

Electrical

Thermal

None of these

Which type of image is formed by a convex lens on a screen:

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Inverted and real

Inverted and virtual

Upright and real

Upright and virtual

Electric potential and e.m.f.

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are the same terms

are the different terms

have different units

both b and c

The characteristics of sound by which we can distinguish between two sounds of same loudness and pitch is called.

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Intensity

Quality

Loudness

Pitch

The sensation of sound persists in our brain for:

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0.1 sec

0.01 sec

1 sec

10 sec

The property of substance, which opposes the flow of current through it is called.

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Resistance

Reactance

Resistivity

None of these

The equivalent resistance in parallel combination is:

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R_c=R₁+R₂+R₃ +.................+R_n

R_c=1/R₁+1/R₂+1/R₃+.................+1/R_n

a and b

None of these

How Galvanometer is connected in circuit to detect current?

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In Series

In Parallel

Fixed

Variable

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