JEE Physics - MCQ Practice Questions

A light bulb rated 60W, 120V is connected to a 120V supply. The resistance of the bulb is:

Three identical cells, each of EMF 1.5V and internal resistance 1Ω, are connected in series. The total EMF and internal resistance are:

A rheostat is used in a circuit to:

In a parallel combination of resistors, the voltage across each resistor is:

In a circuit with a battery of 10V and total resistance 5Ω, the power dissipated is:

In a circuit, if the current increases when voltage increases, the resistance must:

Which of the following materials has the lowest temperature coefficient of resistance?

In a Wheatstone bridge, if P/Q = R/S, then the galvanometer shows zero deflection. This condition is called:

Five resistors each of 5Ω are connected in parallel. The equivalent resistance is:

The specific resistance (resistivity) of a material depends on:

The drift velocity of electrons in a conductor is of the order of:

The resistance of a wire at 0°C is R₀. If its temperature coefficient is α, its resistance at temperature T is:

Two resistances of 3Ω and 6Ω are connected in parallel. The equivalent resistance is:

Which of the following materials has the highest temperature coefficient of resistance?

The resistivity of a semiconductor at absolute zero is:

The current density in a conductor depends on:

A copper wire at 20°C has resistance 100Ω. Its resistance at 120°C is (α for copper = 0.004/°C):

In a carbon resistor, the color bands are Brown-Black-Red-Gold. Its resistance is:

Three resistances of 2Ω, 3Ω, and 6Ω are connected in parallel across a 12V battery. What is the total current drawn from the battery?