Science : Ch 12 – Electricity

The values of mA and µA are:

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

Electrical resistivity of a given metallic wire depends upon:

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

Two resistors are connected in series gives an equivalent resistance of 10 Ω. When connected in parallel, gives 2.4 Ω. Then the individual resistance are

A fuse wire frequently gets burnt when used with a good heater. It is advised to use a fuse wire of

A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross-section of the filament in 16 seconds would be roughly

The resistivity does not change if:

One horsepower (hp) is parallel to

What is the maximum resistance which can be made using five resistors each of 1/5 W?

The commercial unit of electrical energy

Joule’s law of heating implies that heat produced in a resistor is directly proportional to the square of

When a 4 V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resister is

The unit of electric power may also be expressed as

An ideal ammeter is one which has