The potential difference between terminals of an electric heater is 100V when it draws a current of 2A.
i) What will be the resistance of heater?
ii) If the potential difference is now increased to 150V, what will be the current drawn
by the heater?
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Answer:
V = 100V
I = 2A
V = IR
100= 2R
100/2 = R
50= R
R = 50ohm.
(ii) V = 150
V = IR
150= I ×50
150/50= I
3 = I
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