Home
Class 12
PHYSICS
In a Wheatstone bridge a resistance S is...

In a Wheatstone bridge a resistance S is fixed in fourth arm . Keeping resistance `R_(1)` in third arm null condition is obtained . Now if the resistance P and Q are interchanged , resistance `R_(1)` has to be replaced by `R_(2)` to get the balance condition agian . Find the ratio of P and Q and also the value os S .

Text Solution

Verified by Experts

The correct Answer is:
`[sqrt(R_(1)//R_(2)),sqrt(R_(1)//R_(2))]`
Promotional Banner

Topper's Solved these Questions

  • KIRCHHOFF'S LAWS AND ELECTRICAL MEASUREMENT

    CHHAYA PUBLICATION|Exercise EXERCISE ( Problem Set - II)|5 Videos

  • KIRCHHOFF'S LAWS AND ELECTRICAL MEASUREMENT

    CHHAYA PUBLICATION|Exercise ENTRANCE CORNER (Assertion -reason type )|6 Videos

  • KIRCHHOFF'S LAWS AND ELECTRICAL MEASUREMENT

    CHHAYA PUBLICATION|Exercise EXERCISE ( Short Answer Type Questions - II )|1 Videos

  • ELEMENTARY PHENOMENA OF ELECTROSTATICS

    CHHAYA PUBLICATION|Exercise EXAMINATION ARCHIVE|2 Videos

  • LIGHT WAVE AND INTERFERENCE OF LIGHT

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|15 Videos

Similar Questions

Explore conceptually related problems

The resistance in the first and the second arms of a Wheatstone bridge are P=10Omega andQ=20Omega . The third and the fourth arm reistance R and S are so chosen that the bridge is balanced . Now , R is kept fixed , but P and Q are interchnged . The new value of the fourth arm resistance at balance is x% of the old value of S . The value of x is

A Wheatstone bridge has the resistances 10Omega,10Omega,10Omega and 30Omega in its four arms. What resistance joined in parallel to the 30 resistance will bring it to the balanced condition?

A null point is obtained when two resistors , of resistance r each, are connected in series and placed in the fourth arm of a wheatstone bridge . Now , the resistance R of the third arm is kept fixed ,and r, connected in parallel, are placed in the fourth arm. then a null point is obtained only by interchanging the resistances P and Q , and also the value of r.

Two electric bulbes P and Q have their resistance in the ration of 1 : 2 . They are connected in series acrosse a battery . Find the ratio of the power dissipation in these bulbs .

In a wheatstone bridge resistance P , Q , R are connected in the first three arms and the 4 th arm is formed by two resistors S_(1) and S_(2) connected in parallel . What is the balance condition for the bridge ?

In a Wheatstone bridge, a 15Omega resistance and an unknown resistance are placed in third arm and fourth arm respectively . Current through galvanometer becomes zero when ratio of resistance of first and second arms is 3:2 , Find the value of unknown resistance .

Statement I : If the resistance of the first two arms P and Q of a balanced Wheatstone bridge are exchanged , the balanced condition is not disturbed . Statement II : The balanced condition of a Wheatstone bridge is independent of the resistance of the galvanometer used .

A 2m long metallic wire is broken into two unequal points P and Q. P part of the wire is uniformly extended into another wire R. Length of R is twice the length of P and resistance of R is equal to that of Q. Find the ratio of resistances of P and R and also the ratio of lengths of P and Q.

A Wheatstone network ABCD contains equal resistances P in the arms AB and CD and equal resistance Q in the arms AD and BC. A cell of e.m.f. 1 V and negligible resistance is connected across AC. Calculate the potential difference between B and D.