Question

For an electric heater rated 4 KW 200 V,calculate (i) the current required (ii) the resistance of heater (iii) the energy consumed in 1 hr.

Answer 1

Power=Potential difference ×Ampere
P=VI
I=P/V=4000W/200V=20 A
Resistance=V²/p=200×200/4000=10Ω
Energy=Heat=I²Rt=200×200×3600×10=1.44×10∧9=1.44Gj

Answer 2

Answer:

Explanation:

Power=Potential difference ×Ampere

P=VI

I=P/V=4000W/200V=20 A

Resistance=V²/p=200×200/4000=10Ω

Energy=Heat=I²Rt=200×200×3600×10=1.44×10∧9=1.44Gj