NEET2026Physics-Electricity

NEET 2026 Physics Wheatstone Bridge MCQ Question

Type: MCQ-numerical-Medium-Class 12

A uniform metallic wire having resistance 4 Ω is bent to form a square loop (ABCD) (see figure). A resistance of 2 Ω is connected between points B and D and a battery of 2 V is connected across points A and C as shown in the figure. Now the value of current (I) is:

Question diagram
A

2 Å

B

8 Å

C

4.5 Å

D

4 Å

Correct Answer

Option A

Detailed Explanation

Each side will have resistance of 1 Ω. It is a balanced Wheatstone bridge, so no current in the resistance of 2 Ω. The effective resistance across AC is 1 Ω. I = E/Rₑff = 2/1 = 2 Å.

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