Current Electricity

In a given circuit, AB is a uniform potentiometer wire. If the value of resistance ' $R$ ' is slightly increased, the balance point

The range of voltmeter of resistance $300 \Omega$ is 5 V . The resistance required to be connected to convert it into an ammeter of range 5 A is nearly

In a circuit shown, if $10 \Omega$ resistor is replaced by $20 \Omega$, then the current drawn from the battery is

A cell is balanced against 240 cm and 100 cm of potentiometer wire, respectively, when in open circuit and when short-circuited through a resistance of $5 \Omega$. The internal resistance of the cell is

Which one of the following is the correct equation for the electric circuit shown in the figure?

A galvanometer of resistance ' $G$ ' can be converted into a voltmeter of range ( $0-\mathrm{V}$ ) volt by connecting a resistance ' $R$ ' in series with it. The resistance ' $R$ required to change its range from $\left(0-\frac{\mathrm{V}}{...

\(\text { In the following figure, the current } \mathrm{I} \text { is equal to }\)

A galvanometer of resistance ' $G$ ' is converted into an ammeter of resistance $\frac{\mathrm{G}}{40}$, by connecting a shunt ' $S$ ' to it. The part of main current passing through the galvanometer is