JEE Main 2022 · 27 Jul · Shift 1 · Physics Q51

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PhysicsInteger+4 / -1Question 51 of 90

In a meter bridge experiment, for measuring unknown resistance 'S', the null point is obtained at a distance 30 cm from the left side as shown at point D. If R is 5.6 kΩ, then the value of unknown resistance 'S' will be ______ Ω.

Metre bridge: S in the left gap and R in the right gap, a cell and key across the wire, galvanometer G from the middle strip to the jockey at D, 30 cm from the left end (100 − l on the right).

Your answer

Answer and worked solution

Official answer: 2400

Balance. $\frac SR=\frac{30}{70}$ , so $S=5600\times\frac37=2400$ Ω.

Answer: 2400

Topics:Wheatstone bridge and metre bridge Metre bridge and Ohm's law experiments

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JEE Main 2022 · 27 Jul · Shift 1, Physics question 51