Question

when two resistors are connected in series,their effective resistance is 80ohm.when they are connected in parallel, their effective resistance is 20ohm.What are the values of the two resistors​

Answer 1

Answer:

Let the two resistances be R

1

and R

2

.

Series connection R

s

=R

1

+R

2

Or 80=R

1

+R

2

⟹ R

1

=80−R

2

Parallel connection :

R

p

=

R

1

+R

2

R

1

R

2

Or 20=

80

R

1

(80−R

1

)

Or R

1

2

+80R

1

−1600=0

⟹ R

1

=40Ω

So, R

2

=80−40=40 Ω

Answer 2

Answer:

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