Home
Class 12
PHYSICS
The figure shows gives the value of R1 a...

The figure shows gives the value of R1 and R2 the balance point of jockey is at 30cm from A. When R2 is shunted by resistance of 10ohm` jockey has to slide down by 20 cm in order to obtain the balance point. The values of R1 and R2 are

A

`10/5 Omega, 5 Omega`

B

`40/3 Omega, 40/7 Omega`

C

`40/7 Omega, 40/3 Omega`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
c. `R_1/R_2 = 30/70 = 3/7`………..(i)
`R_1/R'_2 = 50/60 = 1 or R_1 = R'_2` ……………(ii)
`R_1 = (R_2xx 10)/(R_2+10) = 3/7R_2 or R_2 = 40/3 Omega or R_1 = 40/7 Omega` .
Promotional Banner

Similar Questions

Explore conceptually related problems

In the figure shown for given values of R_1 and R_2 the balance point for Jockey is at 40cm from A . When R_2 is shunted by a resistance of 10Omega , balance shifts to 50cm . R_1 and R_2 are ( AB=1m ):

In a metre bridge, the gaps are closed by two resistance P and Q and the balance point is obtained at 40 cm . When Q is shunted by a resistance of 10 Omega , the balance point shifts to 50 cm . The values of P and Q are. .

The resistance in the left and right gaps of a balanced meter bridge are R_(1) and R_(1) . The balanced point is 50 cm . If a resistance of 24 Omega is connected in parallel to R_(2) , the balance point is 70 cm . The value of R_(1) or R_(2) is.

In the meter bridge experimental set up, shown in the figure, the null point 'D' is obtained at a distance of 40 cm from end A of the meter bridge wire. If a resistance of 10 Omega is connected in series with R_(1), null point is obtained at AD = 60 cm. Calculate the values of R_(1) and R_(2).

In a meter bridge, null point is at l=33.7cm , when the resistance S is shunted by 12Omega resitance the null point is found to be shifted by a distance of 18.2 cm . The value of unknown resistance R should be

In a meter bride, null point is 20 cm , when the known resistance R is shunted by 10 Omega resistance, null point is found to be shifted by 10 cm . Find the unknown resistance X .

In a meter bridge, null point is 20 cm , when the known resistance R is shunted by 10 Omega resistance, null point is found to be shifted by 10 cm. Find the unknown resistance X .

In a meter bridge, null point is 20 cm , when the known resistance R is shunted by 10 Omega resistance, null point is found to be shifted by 10 cm. Find the unknown resistance X .

The circuit diagram given in the figure shown the experimental setup for the measurement of unknown resistance by using a metre bridge. The wire connected between the points P and Q(PQ = 100 cm) has uniform cross-sectional area and its resistivity is directly proportional to the distance from point P. Null point is obtained with the jockey J with R_1 and R_2 in the gaps. If R_1 and R_2 are interchanged, the jockey has to be displaced through a distance from the previous position along the wire to establish the null point. If the ratio of R_1/R_2=3 , the value of Delta (in cm) is: [Ignore any end corrections]

In a meter bridge, as shown in the figure, it is given that resistance Y = 12.5 Omega and that the balance is obtained at a distance 39.5 cm from end A (by jockey J). After interchanging the resistance X and Y, a new balance point is found at a distance l_(2) from end A. What are the values of X and l_(2) ?