Question

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

Answer 1

Answer:

the values of two resistance are 40 and 40

we get connected the resistance in parallel the resristence is = 20

1/Rp =1/R1+1/R2

20 = 1/40+1/40

20=2/40

20=20

this is how we find the r resistance here

Answer 2

Explanation:

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