Question

Example 2. A cell is connected to a 9 ohm
resistance, because of which heat of 400 J
is produced per second due to current
flowing through it. Obtain the potential
difference applied across the resistance.​

Answer 1

Answer:

30

Explanation:

1. 400 joules per second means power.
2. Power = V^2/R
3. 100=V^2/9
4. V^2 = 900
5. V =30 volt

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