Current Electri...

Choose the correct statement:

Four identical wires each having resistance $$R$$ are connected as shown in the figure. Equivalent resistance between A and B is:

The sensitivity of a potentiometer can be increased by
a) increasing the series resistance in the primary circuit
b) decreasing the length of the potentiometer wire
c) using a thin and high resistivity wire as a potentiometer wire
d) increasing the length of the wire

Wheatstones’s bridge cannot be used for measurement of very _______ resistances.

For a chosen non-zero value of voltage, there can be more than one value of current in:

According to international convention of colour coding in a wire

Specific resistance of a wire depends on the

A $$24 \ V$$ potential difference is applied across a parallel combination of four $$6 \ \Omega$$ resistor. The current in each resistor is:

If the emf of the cell in the primary circuit is doubled, with out changing the cell in the secondary circuit, the balancing length is

If the temperature of a conductor is increased, its resistance will