Current Electri...

In the above questions, the resistance between the square faces is

When an electrical appliance is switched on, it responds almost immediately, because

There is a current of 1.344 amp in a copper wire whose area of cross-section normal to the length of the wire is 1 mm²6 . If the number of free electrons per cm³ is 8.4 × 10²² , then the drift velocity would be

It is easier to start a car engine on a hot day than on a cold day. This is because the internal resistance of the car battery

5 ampere of current is passed through a metallic conductor. The charge flowing in one minute in coulomb will be

An electric wire is connected across a cell of e.m.f. E. The current I is measured by an ammeter of resistance R. According to ohm\'s law

The resistance of a wire at temperatures t° C and 0° C are related by

An electric wire of length ‘L’ and area of cross-section a has a resistance R ohm. Another wire of the same material having same length and area of cross-section 4a has a resistance of

For which of the following the resistance decreases on increasing the temperature?

If n, e, τ and m respectively represent the density, charge relaxation time and mass of the electron, then the resistance of a wire of length l and area of cross-section A will be