Current Electricity

A battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which are connected in series. The terminals of the battery are short-circuited and the current $I$ is measured. Which…

For the circuit shown in the figure, the current $I$ will be

A carbon resistor of $\left(47\pm\,4.7\right)\mathrm{k\Omega}$ is to be marked with rings of different colours for its identification. The colour code sequence will be:

An electron moves on a straight line path XY as shown. The abcd is a coil adjacent to the path of electron. What will be the direction of current, if any, induced in the coil?

The reading of an ideal voltmeter in the circuit shown is

The colour code of a resistance is given below The values of resistance and tolerance, respectively, are

See the electrical circuit shown in this figure. Which of the following equations is a correct equation for it?

The equivalent resistance of the infinite network given below is:

In the circuits shown below, the readings of the voltmeters and the ammeters will be,

In an ammeter $0.2%$ of main current passes through the galvanometer. If resistance of galvanometer is $G,$ the resistance of ammeter will be:

Three resistors having resistances $r_{1},r_{2}$ and $r_{3}$ are connected as shown in the given circuit. The ratio $\frac{i_{3}}{i_{1}}$ of currents in terms of resistances used in the circuit is :

A Wheatstonebridge is used to determine the value of unknown resistance $X$by adjusting the variable resistance $Y$ as shown in the figure. For the most precise measurement of $X$, the resistances $P$ and $Q$