Question

an electric oven of 2 kilowatt high rating is operated in the domestic electric circuit 220 volt that is the current rating of the 5 ampere what result do you accept.explain..

Answer 1

In this problem we have

Power of the oven (P) = 2 kW = 2000 W

Potential Difference (V) = 220 V

We have P = VI

⇒I=P/V

    = 2000/220

    = 9.09A

Answer 2

Answer:

• The rated current for 2KW, 230V electric oven is as follows, ( 220V is the standard 1-phase voltage in India)

• P = VI

• ⇒I=P/V ( Assuming PF=1)

• = 2000/230

• = 9.09 approx

When the oven is connected to 5A, 220V circuit,

• - it draws more current than it is rated for (2000/220 = 9.1A approx) hence may heat up beyond safe limit.

- the wires of the circuit to which it's connected heats up and may melt due to over heating.

• - the socket terminals heat up or even melt down due to over heating.

• If the oven is operated for long time in such circuit, it may damage the oven coil and also could damage the switch and socket permanently.

• Further, since the switch and socket are under rated there insulation may fail and cause electric shock to the preson operating it.

• Some times the pin of the plug also gets welded with the socket metal due to over heating and doesn't get unplugged.

$hope \: its \: help \: u$