73 questions in Chapter 12 Electricity - HI MCQ!

Electrical resistivity of any given metallic wire depends upon?

Mark as favorite

Coulomb is the SI unit of?

Mark as favorite

1 mV is equal to?

Mark as favorite

Which is/ are incorrect?

Mark as favorite

The electric current is a flow of electric charges, called electrons, in a conductor such as a metal wire.
Current is measured by an instrument called voltmeter.
It is the potential difference between the ends of the wire which makes the electric charge to flow in the wire.
When one coulomb of charge flows through any cross-section of a conductor in 1 second, the electric current flowing through it is said to be one ampere.

The resistance of a resistor is reduced to half of its initial value. In doing so, if other parameters of the circuit remain unchanged, the heating effects in the resistor will become?

Mark as favorite

Three resistors of 1 ohm, 2 ft and 3 ohm are connected in parallel. The combined resistance of the three resistors should be?

Mark as favorite

If the current I through a resistor is increased by 100 % (assume that temperature remains unchanged), the increase in power dissipated will be?

Mark as favorite

A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 ohm. The current passing through it is?

Mark as favorite

Electric potential is a?

Mark as favorite

At the time of short circuit, the electric current in the circuit?

Mark as favorite