# 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 Next Question :

 The ratio of the outer and the inner perimeters of a circular path are 23:22. If the path is 5 m wide, the diameter of the inner circle is (a) 55 m (b) 110 m (c) 220 m (d) 230 m 