Answer:
V = 30 volts
Explanation:
Given that,
The resistance of an electric heater, R = 5 ohm
Heat produced is 180 J in one second
We need to find the potential difference of the electric heater. The heat produced is given by :
[tex]E=I^2Rt\\\\or\\\\E=\dfrac{V^2}{R}t\\\\V=\sqrt{\dfrac{ER}{t}} \\\\V=\sqrt{\dfrac{180\times 5}{1}} \\\\V=30\ V[/tex]
So, the potential difference across the heater is 30 volts.
