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15/07/2021 3:53 pm
Topic starter
(a) What is the ratio of potential difference and current known as?
(b) Name the law which is illustrated by the above V-I graph.
(c) Write down the formula which states the relation between potential difference, current and resistance,
(d) The potential difference between the terminals of an electric iron is 240 V and the current is 5.0 A. What is the resistance of the electric iron?
1 Answer
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15/07/2021 3:55 pm
(a) The ratio of potential difference and current is known as resistance.
(b) Ohm’s law
(c) Potential difference = Current x Resistance
(d) V = 240 volt, I = 5amp
We know that
V = IR
240 = 5 x R
R = 240/5 = 48 ohm.