Question

To get 2 Ω resistance using only 10 Ω resistors, the number of them required is

Answer 1

Answer:

20

Explanation:

Inorder to get a min. resistance, we should connect the resistance in parallel series combination.

1/r1 + 1/r2 + 1/r3 = 1/Rp

1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 + 1/10 = 20/10 = 2 Ω

Therefore 20 resistors are required

Answer 2

Answer:

5 resistors are required

Explanation: