If an electric heater draws a current of 5 A when the potential difference across its terminals is 75 V, what current will it draw when the potential difference is increased to 150 V?
10 A
To determine the current drawn by an electric heater when the potential difference is increased, we can use Ohm's Law, which states:
V = IR
where V is the potential difference, I is the current, and R is the resistance.
First, calculate the resistance of the heater when the potential difference is 75 V and the current is 5 A:
R = V/I = 75\,\mathrm{V}/5\,\mathrm{A} = 15\,\Omega
Now, calculate the new current when the potential difference is increased to 150 V using the same resistance:
I = V/R = 150\,\mathrm{V}/15\,\Omega = 10\,\mathrm{A}
Therefore, when the potential difference is increased to 150 V, the electric heater will draw a current of 10 A.
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