Which of the following is NOT a condition for a Wheatstone bridge to be balanced

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Question: Which of the following is NOT a condition for a Wheatstone bridge to be balanced?

Options:

Correct Answer: The resistances must be equal

Solution:

While the other conditions are necessary for balance, the resistances do not need to be equal, just in the same ratio.

Which of the following is NOT a condition for a Wheatstone bridge to be balanced?

Which of the following is NOT a condition for a Wheatstone bridge to be balanced?

Correct Answer: Resistances must be equal

Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown resistances.
Step 2: Know that a Wheatstone bridge has four resistors arranged in a diamond shape.
Step 3: Learn that for the bridge to be balanced, the ratio of the resistances in one branch must equal the ratio in the other branch.
Step 4: Identify the conditions for balance: the ratios of the resistances must be equal, and the bridge must be connected properly.
Step 5: Realize that the resistances themselves do not need to be equal, just that their ratios must match.
Step 6: Conclude that the statement about resistances needing to be equal is NOT a condition for balance.

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