If the total resistance in a Wheatstone bridge is 30Ω and the bridge is balanced

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Question: If the total resistance in a Wheatstone bridge is 30Ω and the bridge is balanced, what is the current through the galvanometer?

Options:

Correct Answer: 0A

Solution:

In a balanced Wheatstone bridge, the current through the galvanometer is zero.

If the total resistance in a Wheatstone bridge is 30Ω and the bridge is balanced, what is the current through the galvanometer?

If the total resistance in a Wheatstone bridge is 30Ω and the bridge is balanced, what is the current through the galvanometer?

Correct Answer: 0 A

Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown resistances by balancing two legs of a bridge circuit.
Step 2: Know that a balanced Wheatstone bridge means that the ratio of the resistances in one leg is equal to the ratio in the other leg.
Step 3: Recognize that when the bridge is balanced, there is no potential difference across the galvanometer.
Step 4: Since there is no potential difference, the current through the galvanometer is zero.

Wheatstone Bridge – A circuit used to measure unknown resistances by balancing two legs of a bridge circuit.
Balanced Condition – In a balanced Wheatstone bridge, the ratio of resistances in one leg is equal to the ratio in the other leg, resulting in no current through the galvanometer.