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Question

Figure shows a Wheatstone bridge circuit. Which of the following correctly shows the currents I1, I2 and I3 in the decreasing order of magnitude ?

A
I1, I2, I3
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B
I3, I2, I1
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C
I2, I3, I1
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D
I2, I1, I3
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Solution

The correct option is D I2, I1, I3
Given Wheatstone bridge is balanced, because ratio of resistance side is equal i.e.,

100 Ω50 Ω=100 Ω50 Ω

Since bridge is balanced so there will not be current flow through the 25 Ω.

I3=0

current I1 has lower magnitude as compare to I2 because it passes through higher resistance (200 Ω).

So, I2>I1>I3

Hence, option (c) is correct.

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