Question # 1

If we double both the current and the voltage in a circuit while keeping its resistance constant, the power.

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remains unchanged

halves

doubles

four time

The center of curved surface of spherical mirror is called:

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Focus

Axis

Centre

Pole

Specific resistance of copper is ____________ x 10^-8Ohm-meter

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1.62

1.69

5.25

2.75

The distance between principal focus and pole of mirror is called:

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Principal focus

Focal length

Aperture

Image

An electric current in conductors is due to the flow of:

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Positive ions

Negtive ions

Positive charge

free electron

The unit of power is _________

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Volt

Watt

Joule

Coulomb

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

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Resistance

Reactance

Resistivity

None of these

Image formed on a camera is:

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Real, inverted, and diminished

Virtual, upright and diminished

Virtual, upright and magnified

Real, inverted and magnified

The rate of flow of charge through any cross-sectional area is called:

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potential difference

Energy

Coulomb

Electric current

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10th Class Physics Chapter 14 Current Electricity English Medium KPK Boards Online Mcqs MCQs With Answers

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