B M Sharma Solutions for Chapter: Electrical Measuring Instruments, Exercise 2: DPP

If the resistance of a voltmeter is $10,000 \mathrm{\Omega }$ and the resistance of the ammeter is $2 \mathrm{\Omega }$, then find the resistance $R$, when the voltmeter reads $12 \mathrm{V}$ and the ammeter reads $0.1 \mathrm{A}$.

In the circuit shown in the figure, reading of voltmeter is $V_1$ when only $S_1$ is closed, reading of voltmeter is $V_2$ when only $S_2$ is closed and reading of voltmeter is $V_3$ when both $S_1$ and $S_2$ are closed. Then,

A moving coil galvanometer has $150$ equal divisions. Its current sensitivity is $10$ divisions per $\mathrm{mA}$ and voltage sensitivity is $2$ divisions per $\mathrm{mV}$. In order that each division reads $1$ $\mathrm{V}$, the resistance, in $\mathrm{ohms}$, needed to be connected in series with the coil, will be

The graph which represents the relation between the total resistance $R$ of a multi-range moving coil voltmeter and its full-scale deflection $V$ is
   

The ammeter has range of $1$ $\mathrm{A}$, without shunt. The range can be varied by using different shunt resistances. The graph between shunt resistance and range will have the nature as

In the circuit shown here, the readings of the ammeter and voltmeter are

The reading of the ideal voltmeter, in the adjoining diagram, will be

A moving coil galvanometer has $150$ equal divisions. Its current sensitivity is $10$divisions per $\mathrm{mA}$ and voltage sensitivity is $2$ divisions per $\mathrm{mV}$. In order that each division reads $1$ $\mathrm{V}$, the resistance, in $\mathrm{ohms}$, needed to be connected in series with the coil, will be