What is the equivalent resistance for a parallel circuit that has two resistors: 18.0 ohms and 23.5 ohms?

A.

10.2 ohms

B.

20.8 ohms

C.

5.5 ohms

D.

41.5 ohms

Question

Physics

Guest

25 April, 20:01

What is the equivalent resistance for a parallel circuit that has two resistors: 18.0 ohms and 23.5 ohms?

A.

10.2 ohms

B.

20.8 ohms

C.

5.5 ohms

D.

41.5 ohms

+2

Answers (1)

Know the Answer?

Dana · Answer 1

A

Explanation:

First of all the answer is less than the smallest resistor, so it is less than 18 ohms.

1 / r1 + 1 / r2 = 1/r

1/18 + 1/23.5 = 1/r

1/18 = 0.05555555

1/23.5 = 0.0422532

1/18 + 1/23.5 = 0.0555555 + 0.0422532

1/r = 0.0981087

r = 1/0.0981087

r = 10.193

A

What is the equivalent resistance for a parallel circuit that has two resistors: 18.0 ohms and 23.5 ohms?A.10.2 ohmsB.20.8 ohmsC.5.5 ohmsD.41.5 ohms

What is the equivalent resistance for a parallel circuit that has two resistors: 18.0 ohms and 23.5 ohms?

A.

10.2 ohms

B.

20.8 ohms

C.

5.5 ohms

D.

41.5 ohms