Question

A hot plate of electric oven
connected to 250 v electric
Supply line for 2 hours has two
Coils of 50 resistance each.
find total current drawn heat
generated & total power consumed.​

Answer 1

Solution:

Supply voltage, V = 220 V

Here Resistance of one coil, R =24 Ω

(i) Coils are used separately

According to Ohm’s law, V=I1R1

I1 is the current flowing through the coil

I1=V/R1=220/24=9.166A

∴ current flow through the coil when used separately is 9.16 A.

(ii) Coils are connected in series

R2=24 Ω+24 Ω=48 Ω

According to Ohm’s law

I2=V/R2=220/48=4.58A

the current flowing through the series circuit is 4.58A

(iii) Coils are connected in parallel

According to Ohm’s law

I3=V/R3=220/12=18.33A

the current flowing through the parallel circuit is 18.33A