When it is desired to increase current without affecting its voltage, the batteries must be connected in:

A metallic wire of length L, resistance R, and resistivity p is cut into two equal parts, the resistivity of each part would be:

The resistance of a current-carrying wire does not depend upon:

Resistance of 10 $$\Omega$$   30 $$\Omega$$ and 40 $$\Omega$$ are connected in series. if the current in 10 $$\Omega$$ is 0.1A then the current through 40 $$\Omega$$ will be:

The emf of the combination of the three cells, each of 2 volts, connected in parallel will be:

Two wires of resistance are connected in series in a circuit. If R₁ is greater than R₂, the heating would be:

A copper wire having resistivity ρ is stretched in such a way that its diameter reduces to half of that of the original wire. the new resistivity will be:

Resistors of 3Ω, 5Ω, and 7Ω are connected in parallel. if the P.D across 5Ω resistors is 6volt, the P.D across other resistors is:

The electric energy dissipated as heat in a resistor is:

The magnitude of drift speed of free electron is of the order of:

The smallest total resisance which can be obtained by the combination of 2ohm and 8ohm resistance is:

The electrons moves in a circuit from negative terminal to positive terminal of battery is called

Direction of current taken as:

Increase in temperature does not effect on

Resistivity directly depends upon:

Kilowatt-hour is the unit of:

A wire of a uniform cross-sectional area is cut into three equal segments. The resistivity of each segment will be: