Two coils of resistances $5 \Omega$and $10 \Omega$ are connected across a battery of emf $10 \mathrm{V}$. Find the electrical energy consumed in $5$ minutes by each coil when,
(a) these are connected in parallel
(b) these are connected in series.

The following circuit diagram shows the experimental set-up for the study of the dependence of current on potential difference. Which two circuit components are connected in series?

Which of the circuit components in the following circuit diagram are connected in parallel?

The current flowing through a conductor and the potential difference across its two ends are as per readings of the ammeter and voltmeter shown below. The resistance of the conductor would be

The following instruments are available in a laboratory.

Milliammeter $A_1$ of range $0-300 \mathrm{mA}$ and least count $10 \mathrm{mA}$
Milliammeter $A_2$ of range $0-200 \mathrm{mA}$ and least count $20 \mathrm{mA}$
Voltmeter $V_1$ of range $0-5 \mathrm{V}$ and least count $0.2 \mathrm{V}$
Voltmeter $V_2$ of range $0-3 \mathrm{V}$ and least count $0.3 \mathrm{V}$
Out of the following pairs of instruments which pair would be the best choice for carrying out the experiment to determine the equivalent resistance of two resistors connected in series.

In an experiment to determine equivalent resistance of two resistors $R_1$ and $R_2$ in series, which one of the following circuit diagrams shows the correct way of connecting the voltmeter in the circuit?