Question

Fuse 3A, 5A and 10A are available. Calculate and select the fuse for operating an electric iron of power 1.32 KW at a 220 V line?

Answer 1

Answer:

The fuse of rating 10 Amp is selected .

Explanation:

Given as :

Power rating of electric iron = P = 1.32 kw

The line voltage = V = 220 v

Let The rating of fuse = I amp

According to question

∵  Power = voltage × current

1.32 w × 1000= 220 v × I

Or, 220  I = 1320

Or, I = $\dfrac{1320}{220}$

∴    I = 6 Amp

So, The rating of fuse = I = 6 amp

Hence, The fuse of rating 10 Amp is selected . Answer