A student investigated two metallic wires and and obtained the following readings: |…

PHYSICS · Multi-part · A Level · Physics · Electricity · Electricity

Problem

A student investigated two metallic wires

A

and

B

and obtained the following readings:

$V$ (V)	$I$ in $A$ (A)	$I$ in $B$ (A)
1	0.03	0.05
2	0.06	0.10
3	0.09	0.15
4	0.12	0.20
5	0.15	0.25

Answer the following questions: (i) On the same set of axes, plot the

V

–

I

graphs for wires

A

and

B

. (ii) From the slopes of the graphs, determine the resistance of each wire. (iii) The wires are now connected in parallel across a

6\,\text{V}

battery. Calculate the equivalent resistance of the parallel combination. (iv) Using the result of part (iii), find the total current drawn from the battery.

Related theory

Resistors in Parallel
Resistor Networks
Ohm's Law
Ohm's Law (Macroscopic)
Ohm's law, V-I graphs and ohmic/non-ohmic conductors
Current Electricity
Ohm's law and V-I graphs
Electricity

Browse the problem library