An electric lamp of resistance 100 Ω draws a current of 0.5 A. Find the line voltage.
We can use Ohm’s law to find the line voltage:
V = I × R
where V is the line voltage, I is current, and R is the resistance of the electric lamp.
Substituting the given values, we get:
V = 0.5 A × 100 Ω
Simplifying the expression, we get:
V = 50V
Therefore, the line voltage is 50V.