Question

draw V-I graph and find the resistance
V = 4 8 12 16
I = 0.5 1 1.5 2

Answer 1

according to ohms law V is propational to I.where I is current and V is Voltage . V=I.R on putting the values here we get R (resistance ) to be constant so the graph will be a straight line.

Answer 2

Since, the formula to take out Resistance we will take sum of total potential difference and electric current.

Total Potential Difference = ( 4 + 8 + 12 + 16 ) Volts

= 40 V

Total Electric Current = ( 0.5 + 1 + 1.5 + 2 ) Ampere

= 5 A

Since, R = V/A

Resistance = 40 V/5 A

Resistance = 8 Ω

Concept of Units :

1. Ohm (Ω) is unit of Resistance.

2. Volts is unit of Potential Difference.

3. Ampere is unit of Electric Current.