Explain why is the p.d. across the terminals of a cell more in an open circuit and reduced in a closed circuit.

Write the condition required for a circuit to be a closed circuit.

Find the potential drop across the capacitor in the given circuit.

Why is it necessary to have an earth wire installed in a power circuit, but not in a lighting circuit ?

The equivalent resistance across the terminals of source of e.m.f. 24 V for the circuit shown in the figure is

Output at terminal Y of given logic circuit.

A resistance R is connected at the n terminal of a p-n junction in series. An AC voltage is applied across this circuit. Which of the following are true for the circuit?

A voltmeter of resistance 998 Omega is connected across a cell of emf 2 V and internal resistance 2 Omega . Find the p.d. across the voltmeter, that across the terminals of the cell and percentage error in the reading of the voltmeter.

Consider a magnet surround by a wire with an on // of switch S (figure) if the switch is thrown from the off position (open circuit) to the on position the (closed circuit).

The depletion region of a P-N diode, under open circuit condition contains

Name the following. A device that is used to open or close a circuit