Which of the following acts as a circuit protection device?

1.	Fuse	2.	Conductor
3.	Inductor	4.	Switch

A cell of EMF \(2\) V and internal resistance \(1\) \(\Omega,\) is connected across a resistor of resistance \(3~\Omega.\) The voltage across the terminals of the cell will be:
1. \(1.5\) V
2. \(2.0\) V
3. \(1.39\) V
4. \(1.79\) V

In the electrical network shown below, what is the magnitude of current \(I \text{?}\)

Given \(n\) resistors each of resistance \(R,\) what is the ratio of the maximum to minimum resistance?
1. \(\dfrac{1}{n}\)

2. \(n\)

3. \(\dfrac{1}{n^2}\)

4. \(n^2\)

A secondary cell, after long use, has an emf of \(1.9~\text{V}\) and a large internal resistance of \(380~\Omega.\) What maximum current can be drawn from the cell?
1. \(0.05~\text{A}\)
2. \(0.005~\text{A}\)
3. \(5.0~\text{A}\)
4. \(0.5~\text{A}\)

A battery of emf \(10 ~\text V\) and internal resistance $\mathrm{}$\(3~\Omega\) is connected to a resistor. If the current in the circuit is \(0.5~\text A,\) what is the terminal voltage of the battery when the circuit is closed?
1. \(10~\text V\)
2. \(8.5~\text V\)
3. \(1.5~\text V\)
4. \(7.2~\text V\)

Three resistors $\mathrm{}$\(2~\Omega, 4~\Omega\) and\(5~\Omega, \) are combined in parallel. If the combination is connected to a battery of emf \(20~\text V\) and negligible internal resistance, the total current drawn from the battery is:
1. \(10~\text A\)
2. \(17~\text A\)
3. \(13~\text A\)
4. \(19~\text A\)