Question

If the resistance in the 3 successive earn of a balanced whitestone bridge are 1,2 and 36 ohm respectively.what will be the 4th arm?

Answer 1

Answer: 72 ohms

Explanation:

Let the resistance of the 4th arm be X

Ratio: 1/2 = 36/X

X = 36 × 2 = 72 ohms