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. \(n^2\)

Given the resistances of 1Ω, 2Ω, 3Ω, how will we combine them to get an equivalent resistance of (11/3):

The number density of free electrons in a copper conductor is \(8.5×10^{28}~\text  m^{–3}.\) How long does an electron take to drift from one end of a wire \(3.0~\text m\) long to its other end?
(the area of the cross-section of the wire is \(2.0×10^{–6}~\text m^2\) and it is carrying a current of \(3.0~\text A\))
1. \(2.7 \times10^{4}~\text s\) 
2.​​​​​​​ \(3.3 \times10^{4}~\text s\) 
3.​​​​​​​ \(2.0 \times10^{3}~\text s\) 
4.​​​​​​​ \(3.9 \times10^{3}~\text s\)

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. \(1127~^{\circ}\text{C}\)