Question # 1

Resistance tolerance for gold colour is.

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50%

30%

20%

5%

Kirchhoff's voltage rule is a way of stating conservation of.

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Mass

Charge

Energy

Momentum

The powers of two electric bulbs are 100w and 200w. Which are connected to power supply of 220 V. The ratio of resistance of their filament will be:

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1:2

2:1

1:3

4:3

Drift velocity of electrons is.

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10^-1 m/s

10^-2 m/s

10^-3 m/s

10³ m/s

Resistivity at a given temperature depends upon.

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Area of cross section

Length

Nature of material of conductor

Both length and area

If the resistance of 500 Ohm have fourth band of silver colour then its upper maximum resistance will be.

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600 Ohm

550 Ohm

450 Ohm

400 Ohm

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

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Increase

Remains constant

Decreases

Changes exponentially

Two resistance of 2 Ohm each are connected in parallel combination equivalent resistance will be.

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4 Ohm

2 Ohm

1 Ohm

8 Ohm

The reciprocal of resistance is called.

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Capacitance

Resistance

Conductance

Inductance

Thermistor with high - ve temperature coefficient are very accurate for measuring low temperature especially near is.

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10 kelvin

70 kelvin

200 kelvin

35 kelvin

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

The head produced by the passage of current through a resistor is.

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H= I²Rt

H = IR²t

H = 1/Rt

H = I²/Rt

Potentiometer is used to.

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Compare emf of two cells

Detect internal resistance of cell

Measure P.D.

All of these

The vessel containing the tow electrodes and liquid to known as.

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Chemical cell

Volt cell

Volta cell

Volta meter

mho -m-1 is the unit of.

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Resistance

Resistivity

Conductance

Conductivity

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

Heat generated by a 40 W bulb in one hour is.

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140 J

1440 J

14400 J

144000 J

The color code of "Green"

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8

3

5

7

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