Question

b) A 4 kW heater is connected to a 220 V source of power. Calculate (i) The electric current passing through the heater, (in) The resistance of the heater. (iii) The electric energy consumed in 2 hour use of the heater ​

Answer 1

Answer:

Explanation:

Power=VI=250×I

4000=250×I

I=16amp

R=?

P=I^2 R

P=16^2×R

R=4000/16^2

 

R=15.25ohm

(d) If 1kWh=Rs.4.6

total cost =8×4.6=Rs.36.8