An unknown resistance is connected in the left gap of a metre bridge and a resistance R is connected in the right gap. The null point is obtained at 40 cm from the left end. When a 10 N resistor is connected in series with the unknown resistance and the same resistance R is kept in the right gap, the null point is obtained at the centre of the wire. Calculate the unknown resistance.
An unknown resistance is connected in the left gap of a metre bridge and a resistance R is connected in the right gap. The null point is obtained at 40 cm from the left end. When a 10 N resistor is connected in series with the unknown resistance and the same resistance R is kept in the right gap, the null point is obtained at the centre of the wire. Calculate the unknown resistance.
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Transcribed Image Text:An unknown resistance is connected in
the left gap of a metre bridge and a resistance
R is connected in the right gap. The null point
is obtained at 40 cm from the left end. When a
10 N resistor is connected in series with the
unknown resistance and the same resistance R
is kept in the right gap, the null point is
obtained at the centre of the wire. Calculate
the unknown resistance.
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