Basics Of Electrical Engineering MCQ Practice Quiz 3

Conductance is reciprocal of__?

The resistance of a conductor varies inversely as ____?

With rise in temperature the resistance of pure metals___?

With rise in temperature the resistance of semi-conductors ___?

The resistance of a copper wire 200 m long is21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around__?

A 3Q resistor having 2 A current will dissipate the power of ____?

Which of the following statement is true:

The resistance of a few meters of wire conductor in closed electrical circuit

If a parallel circuit is opened in the main line, the current

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

Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open____?

The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true:

Two resistances Rl and Ri are connected in series across the voltage source where RI>Ri. The largest drop will be across____?

A closed switch has a resistance

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

The insulation on a current carrying conductor is provided

The thickness of insulation provided on the conductor depends on.

Which of the following quantities remain the same in all parts of a series circuit_____?

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____?

In an electric kettle water boils in 10 minutes. It is required to boil the boiler in 15 minutes, using same supply mains____?

An electric filament bulb can be worked from____?

Electric current passing through the circuit produces _____?

Resistance of a material always decreases if ____?

If the efficiency of a machine is to be high, what should be low

When electric current passes through a metallic conductor, its temperature rises. This is due to___?