Science : Ch 12 – Electricity

The values of mA and µA are:

The instrument used for measuring electric current is:

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 devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is

The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is:

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

True test of charge is

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

The ammeter is always connected in series because

S.I unit of resistance

The rate at which electrical work is done or the rate at which electrical energy is consumed

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

The equivalent resistance of a series combination of two resistances is X Ohm. If the resistance are of 10 Ohm and 40 Ohm respectively, the value of X will be:

An ideal ammeter is one which has

The device used to measure the internal resistance of a cell, to compare the e.m.f. of two cells and potential diference across a resistor