Six lead-acid type of secondary cells each of emf \(2.0~\text V\) and internal resistance \(0.015~\Omega\) are joined in series to provide a supply to a resistance of \(8.5~\Omega\). What is the current drawn from the supply?
1. \(2.10~\text{A}\)
2. \(1.39~\text{A}\)
3. \(1.71~\text{A}\)
4. \(2.21~\text{A}\)

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. \(0.5~\text{A}\)

The storage battery of a car has an EMF of \(12~\text V.\) If the internal resistance of the battery is \(0.4~\Omega,\) what is the maximum current that can be drawn from the battery?
1. \(30~\text A\)
2. \(20~\text A\)
3. \(10~\text A\)
4. \(40~\text A\)

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. \(19~\text A\)

At room temperature \((27~^\circ \text{C})\) the resistance of a heating element is \(100~\Omega.\) What is the temperature of the element if the resistance is found to be \(117~\Omega?\)
(Given that the temperature coefficient of the material of the resistor is \(1.70\times 10^{-4}~^{\circ}\text{C}^{-1}\))
1. \(1027~^{\circ}\text{C}\)
2. \(1007~^{\circ}\text{C}\)
3. \(1020~^{\circ}\text{C}\)
4. \(1127~^{\circ}\text{C}\)

A negligibly small current is passed through a wire of length \(15~\text{m}\) and uniform cross-section $\mathrm{}$\(6.0\times10^{-7}~\text{m}^2,\) and its resistance is measured to be $\mathrm{}$\(5.0~\Omega.\) What is the resistivity of the material at the temperature of the experiment?

A silver wire has a resistance of \(2.1~\Omega\) at \(27.5^\circ \text{C},\) and a resistance of \(2.7~\Omega\) at \(100^\circ \text{C}.\) The temperature coefficient of resistivity of silver is:
1. \(0.0033^\circ \text{C}^{-1}\)
2. \(0.039^\circ \text{C}^{-1}\)
3. \(0.0039^\circ \text{C}^{-1}\)
4. \(0.033^\circ \text{C}^{-1}\)

The current drawn from a \(12~\text{V}\) supply with internal resistance \(0.5~\Omega\) by the infinite network (shown in the figure) is:

    
1. \(3.12~\text{A}\)
2. \(3.72~\text{A}\)
3. \(2.29~\text{A}\)
4. \(2.37~\text{A}\)