Question

An electric geyser has the ratings 2000 W, 220 V marked on it. What should be the minimum rating, in whole number, of a fuse wire that may be required for safe use with this geyser?

Answer 1

Power of the geyser = 2000 W

Voltage = 220 V

Maximum current = $\frac{\text{Power}}{\text{Voltage}}=\frac{2000\text{W}}{220\text{V}}=9.09\text{A}$


The current that passes through the circuit having the geyser is 9.09 Amp. The rating of the fuse must be more than 9.09 A for safe use with this geyser. That's why the required minimum rating should be 10 A.