Question

4000 joule of heat it is produced each second in 10 ohm resistance. The potential difference across the resistor is :​

Answer 1

Answer:

Given :

Heat = 4000J

resistance = 10ohm

Time = 1s

H = VIT

4000 = 10 x 1 x V

4000 / 10 = V

400v = V

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Answer 2

• Heat=H=4000J
• Resistance=R=10ohm
• Time=t=1s
• Potential difference=V=?

Using Joules law

$\boxed{\sf H=\dfrac{V^2}{R}t}$

$\\ \sf\longmapsto 4000=\dfrac{V^2}{10}1$

$\\ \sf\longmapsto \dfrac{V^2}{10}=4000$

$\\ \sf\longmapsto V^2=4000(10)$

$\\ \sf\longmapsto V^2=40000$

$\\ \sf\longmapsto V=\sqrt{40000}$

$\\ \sf\longmapsto V=200V$