Question # 1

By increasing the temperature of conductor, the flow rate of charges.

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Increase

Remains constant

Decreases

Changes exponentially

The thermistors convert changes of temperature into.

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Light energy

Electric voltage

Heat

Sound

Electric power:

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Vx1

V²x1

V/1

V/1²

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

The Kirchhoff 1^st rule is manifestation of:

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Law of conservation of mass

Law of Conservation of charge

Law of conservation of energy

None of above

An ideal current source shall have resistance

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Zero

Finite but not zero

Infinite

Depend upon requirement

A charged conductor has charge on its.

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Inner surface

Outer surface

Middle surface

Surrounding space

106 electrons are moving through a wire per second the current developed is:

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1.6 x 10-19 A

1 A

1.6 x 10-13A

106 A

The unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

If a charge Q flows through any cross section of the conductor in time t, the current I is

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I=Qt

The reciprocal of resistance is called.

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Capacitance

Resistance

Conductance

Inductance

Calculate current in 2 2R /4Ω resistor.

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1 A

2R /4Ω

R/3Ω

2R /3Ω

The unit of temperature co efficient of resistivity is.

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Ohm -m

K-1

K

Ohm

A battery move a charge of 40 C around a circuit at constant rate in 20 Sec. The current will be.

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2 A

0.5 A

80 A

800 A

A rheostat can operate as.

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Amplifier

Potential divider

Oscillator

Transformer

A wire uniform cross-section. A length L and resistance R is cut into two equal parts. The resistivity of each part will be:

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Doubled

Halved

Remain the same

One fourth

Seven resistances are connected as shown in the figures . THe equivalent resistance between A and B is:

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3Ω

4Ω

4.5Ω

5Ω

The current flowing through each resistor of equal resistance in parallel combination is.

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Same

Different

Zero

Infinite

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