The following table shows three observations noted by a student while using a single resistor in a circuit:
Observation
Potential difference V (V)
Current I (A)
1
1.5
0.30
2
3.0
0.60
3
4.5
0.90
(i) For each observation calculate the resistance of the resistor.
(ii) Do the three values of resistance agree within reasonable experimental error? State the conclusion you would draw about the nature of the resistor.
(iii) Predict the current that should be obtained if the potential difference across the same resistor is increased to 6.0 V, keeping all other conditions unchanged.