What will be the ammeter reading for the circuit shown in the figure? 

     

The diagram shows a network of four resistors which is connected to an electric source. Identify the resistors which are connected in series in this network.

The following instruments are available in a laboratory:

Milliammeter ${\mathrm{A}}_1$ of range $0-300 \mathrm{mA}$ and least count $10 \mathrm{mA}$.

Milliammeter ${\mathrm{A}}_2$ of range $0-200 \mathrm{mA}$ and least count $20 \mathrm{mA}$.

Voltmeter ${\mathrm{V}}_1$ of range $0-5 \mathrm{V}$ and least count $0.2 \mathrm{V}$.

Voltmeter ${\mathrm{V}}_2$ 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?

Which is the correct setup for determining the equivalent resistance of two ${\mathrm{R}}_1$ and ${\mathrm{R}}_2$ connected in parallel and why?

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

In the experiment on finding the equivalent resistance of two resistors, connected in parallel, three students connected the voltmeter in their circuits, in the three ways, $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ shown here:

In which circuit the voltmeter has been correctly connected?

For carrying out the experiment, on finding the equivalent resistance of two resistances connected in parallel, a student sets up the circuit as shown. What are the faults in his circuit?

The following apparatus is available in the laboratory:

Battery: adjustable from $0$ to $6 \mathrm{V}$ 

Resistance: $4 \mathrm{\Omega }$ and $12 \mathrm{\Omega }$

Ammeters: ${\mathrm{A}}_1$ of range $0$ to $5 \mathrm{A}$ and least count $0.25 \mathrm{A}$. ${\mathrm{A}}_2$ of range $0$ to $3 \mathrm{A}$ and least count $0.10 \mathrm{A}$.

Voltmeters: ${\mathrm{V}}_1$ of range $0$ to $10 \mathrm{V}$ and least count $0.5 \mathrm{V}$. ${\mathrm{V}}_2$ of range $0$ to $5 \mathrm{V}$ and least count $0.1 \mathrm{V}$.

What will be the best choice for the experiment to find the equivalent resistance of a parallel combination of two given resistors?