Question

a hot plate of an electric oven connected to a 220v line has two resistance coils A&B each of 24 ohm resistance which may be used separately in series or in parallel what are the currents in the three cases

Answer 1

case one when only one is connected

i=v/r

i=220/24i=9.16

case 2 when both are connected in series

 r=r1+r2

r=24+24= 48

i=4.53

case 3 when in parallel

r= 1/r +1/r

r=12

i=v/r

i=18.33

Answer 2

Explanation:

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