Question

hlw guys please tell this questn. ...​

Answer 1

Explanation:

The voltage across R when the sliding contact is in the middle of potentiometer wire is V1 = 2VR / Ro + 4R .

When the slide is in the middle then its total resistance I.eRo/2 between the points will be

1/R1 = 1/R + 1/Ro+2

R1 = 2 RRo / 2Rv+ Ro

The total resistance between A and B will be the sum of resistance A and C .

That is R1 + Ro / 2 .

Current flowing through the potentiometer will be

1= V/ R1 + Ro/2 = 2v / 2R1 + Ro

The voltage V1 from the potentiometer will be the product of current and the resistance R1.

V1 = 1R1 = 2V / 2R1 + Ro × R1 = 2V / 2RRo / 2R + Ro + Ro = 2VR / Ro + 4R

Thus the voltage across R when the sliding contact is in the middle of potentiometer wire is V1 = 2VR / Ro + 4R.

Answer 2

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