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An electric heater is rated 2200 W at 220 V. The minimum rating of the fuse wire to be connected to the device is:
Question

An electric heater is rated 2200 W at 220 V. The minimum rating of the fuse wire to be connected to the device is:

A.

20 A

B.

5 A

C.

10 A

D.

22 A

Correct option is C

Given:

Power (p) = 2200w

Voltage(v) = 220 v

Formula used:

I = PV\frac{P}{V}

Solution:

I = 2200220\frac{2200}{220}

I = 10A

The fuse must have a slightly higher rating than the current drawn to avoid unnecessary tripping during normal operation.
Thus, the minimum fuse rating for this device should be 10 A

The minimum rating of the fuse wire is

10 A.​

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