Current Electricity · Cells and circuits
Two resistors and are connected in the gaps of bridge as shown in figure. The null point is obtained with the contact of jockey at some point on wire XY. When an unknown resistor is connected in parallel with resistor, the null point is shifted by 22.5 cm toward Y. The resistance of unknown resistor is . (Take the length of the wire XY as 100 cm)
- (1)3
- (2)2
- (3)4
- (4)1
We corrected a printing error in the original paper
Assumption “(Take the length of the wire XY as 100 cm)” added; the source leaves it unstated.
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