CURRENT ELECTRICITY QUIZ

Ohm's law is not applicable to

High voltage circuits

Vaccum tubes

Circuits with low current densities

Carbon resistors

TRUE ANSWER : ?
YOUR ANSWER : ?

A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will

Decreases

Remains same

Increases

Heater will burn out

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YOUR ANSWER : ?

The specific resistance of a metallic conductor ______ with rise in temperature.

Decreases

Increases

Remains unchanged

None of the listed here

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YOUR ANSWER : ?

Which of the following statement is true both for a series and a parallel D.C. circuit?

Power are additive

Voltages are additive

Elements have individual currents

Currents are additive

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The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is

Zero

Positive

Negative

About 2 ohms per degree

TRUE ANSWER : ?
YOUR ANSWER : ?

The SI unit of power is

Watt-hour

Henry

Watt

Coulomb

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YOUR ANSWER : ?

E. M. F. In a circuit

None of the listed here

Increases circuit resistance

Decrease circuit resistance

Maintains potential difference

TRUE ANSWER : ?
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A copper wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be

12.1 Ω

11 Ω

10 Ω

9 Ω

TRUE ANSWER : ?
YOUR ANSWER : ?

A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is

600 Ω

400 Ω

800 Ω

1000 Ω

TRUE ANSWER : ?
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For which of the following 'ampere second' could be the unit?

Charge

Energy

Reluctance

Power

TRUE ANSWER : ?
YOUR ANSWER : ?

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