Question

The following table shows current in Amperes and potential difference in Volts.
V (Volts)
4
5
6

I (Amp)
9
11.25
13.5

a. Find the average resistance.b. What will be the nature of the graph between the current and potential difference? (Do not draw a graph.)c. Which law will the graph prove? Explain the law.

Answer 1

ohm's law. current is directly proportional to resistance and inversely proportional to potential difference

Answer 2

Answer:

Explanation:

Resistance = Voltage / Current

R = V/I

R = 4/9 =  0.444

R = 5/11.25 = 0.444

R = 6/13.5 = 0.444

Average resistance = 0.444

Nature of graph is a straight line with a slope equivalent to resistance

Graph will prove that

Current flowing through a conductor is directly proportional to the potential difference applied across it ( Ohm's Law)

I ∝ V

=> I = V/R

R = resistance of conductor