Question

If 5A current flows through an electric iron, it produces 50J heat in one second, the potential across the electric iron will be

• A. 10V
• B. 0.1V
• C. 225V
• D. 2.25V

Hint:

The potential (voltage) across an electric device can be calculated using the formula \( V = \dfrac{P}{I} \), where \( P \) is the power and \( I \) is the current.

Answer 1

The Correct Option is A

We are given the following information:
Current (I) = 5 A
Heat produced (H) = 50 J
Time (t) = 1 second
We need to find the potential difference (V).
The relationship between heat produced, potential difference, current, and time is given by Joule's law of heating:
$H = V \times I \times t$.
We can rearrange this formula to solve for V:
$V = \frac{H}{I \times t}$.
Now, substitute the given values into the formula:
$V = \frac{50}{5 \times 1}$.
$V = \frac{50}{5}$.
$V = 10$ Volts.