# In the experimental set up of metre bridge shown in the figure, the null point is obtained at a distance of 40 cm from A. If a 10 resistor is connected in series with R1, the null point shifts by 10 cm. The resistance that should be connected in parallel with (R1 + 10) such that the null point shifts back to its initial position is a. 40 b. 60 c. 20 d. 30

## Question ID - 50605 :- In the experimental set up of metre bridge shown in the figure, the null point is obtained at a distance of 40 cm from A. If a 10 resistor is connected in series with R1, the null point shifts by 10 cm. The resistance that should be connected in parallel with (R1 + 10) such that the null point shifts back to its initial position is a. 40 b. 60 c. 20 d. 30

3537

=                               …..(i)

= 1   ⇒  + 10 =     ….. (ii)

+ 10 =

10 =      ⇒ = 30

= 20

=

R = 60

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