CURRENT ELECTRICITY QUIZ

Semiconductors have _______temperature co-efficient of resistance.

Zero

None of the listed here

Positive

Negative

TRUE ANSWER : ?
YOUR ANSWER : ?

Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct?

40 W lamp will glow brighter

40 W lamp will fuse

100 W lamp will glow brighter

Both lamps will glow equally bright

TRUE ANSWER : ?
YOUR ANSWER : ?

When current flows through heater coil it glows but supply wiring does not glow because

Current through supply line flows at slower speed

Supply wires are made of superior material

Supply wiring is covered with insulation layer

Resistance of heater coil is more than the supply wires

TRUE ANSWER : ?
YOUR ANSWER : ?

Electric current passing through the circuit produces

Thermal effect

Luminous effect

Chemical effect

Magnetic effect

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YOUR ANSWER : ?

Ampere-hour is the unit of

Power

Quantity of electricity

Strength of current

Energy

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YOUR ANSWER : ?

If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes

0.8 ohm

1.0 ohm

0.6 ohm

0.4 ohm

TRUE ANSWER : ?
YOUR ANSWER : ?

In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is

132 V

33 V

80 V

66 V

TRUE ANSWER : ?
YOUR ANSWER : ?

Ohm's law is not applicable to

Semi-conductors

High currents

Dc circuits

Small resistors

TRUE ANSWER : ?
YOUR ANSWER : ?

The flow of current in solids is due to

Atoms

Electrons and ions

Nucleus

Electrons

TRUE ANSWER : ?
YOUR ANSWER : ?

In a series circuit with unequal resistances

The lowest resistance has the highest current

The highest resistance has the highest voltage drop

The lowest resistance has the highest voltage drop

The highest resistance has the most of the current through it

TRUE ANSWER : ?
YOUR ANSWER : ?