SaraNextGen.Com

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 | SaraNextGen Top Answer

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

1 Answer
127 votes
Answer Key / Explanation : (b) -

 =                               …..(i)

 = 1   ⇒  + 10 =     ….. (ii)

 + 10 =

10 =      ⇒ = 30

 = 20

  =

R = 60

127 votes


127