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 |
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 |
=
…..(i)
= 1 ⇒
+ 10 =
….. (ii)
+ 10 =
10 = ⇒
= 30
& = 20
=
R = 60