Question

A hot plate of an electric oven connected to 220V line has two resistance coils A and B, each of 24Ω resistance, which may be used separately, in series, or in parallel, what are the currents in the three cases?

Answer 1

Explanation:

Case 1: Coils used separately.

V=IR

220=24I

I=9.167 A

Case 2: Coils used in series

R

eq

=R

1

+R

2

=24+24=48 Ω

V=IR

eq

220=48I

I=4.583 A

Case 3: Coils used in parallel

R

eq

1

=

R

1

1

+

R

2

1

R

eq

=12 Ω

V=IR

eq

220=12I

I=18.334 A

Answer 2

Answer:

It is the correct answer.

Explanation:

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