Wheatstone Bridge

Q. In the electrical circuit shown in figure the current through the galvanometer will be zero if the value of resistance x is

1. 16 ohm
2. 4 ohm
3. 8 ohm
4. 24 ohm

Q. In the network shown in the figure each of resistance is equal to $2\Omega$. The resistance between A and B is

1. $1\Omega$
2. $3\Omega$
3. $4\Omega$
4. $2\Omega$

Q. In Wheatstone's bridge P=9ohm, Q=11ohm, R=4ohm and S=6ohm. How much resistance must be put in parallel to the resistance S to balance the bridge

1. 26.4 ohm
2. 24 ohm
3. 44/9 ohm
4. 18.7 ohm

Q. Consider the following statements regarding the network shown in the figure.

(1) The equivalent resistance of the network between points $A$ and $B$ is independent of the value of $G$.
(2) The equivalent resistance of the network between points $A$ and $B$ is $\frac{4}{3}R$.
(3) The current through $G$ is zero.
Which of the above statement(s) is/are true?

1. (2) and (3)
2. (2) alone
3. (1), (2) and (3)
4. (1) alone

Q. The P.D between A and B will be zero when the resistance R is

1. 4.5 ohm
2. 12 ohm
3. 9 ohm
4. 6 ohm

Q. A, B, C ad D are four resistances of 4, 4, 4 and $8\Omega$ respectively. They are used to form a wheatstone bridge.The resistance D is short circuited with a resistance R in order to get the bridge balanced. The value of R will be

1. $4\Omega$
2. $6\Omega$
3. $8\Omega$
4. $3\Omega$

Q. Find the resistance of the circuit shown below figure between points A and D.

1. $\frac{2R}{3}\Omega$
2. $5R\Omega$
3. $\frac{5R}{2}\Omega$
4. $R\Omega$

Q. The figure shows a circuit diagram of a ‘Wheatstone Bridge’ to measure the resistance G of the galvanometer. The relation $\frac{P}{Q}=\frac{R}{G}$ will be satisfied only when

1. The galvanometer shows a deflection when switch S is closed
2. The galvanometer shows no change in deflection whether S is open or closed
3. The galvanometer shows no deflection
4. The galvanometer shows a deflection when switch S is open

Q. Four resistances P, Q, R, X formed wheat stone bridge. The bridge is balanced when $R=64\Omega$. If P and Q are inter changed to bridge is balanced for $R=144\Omega$. The value of ‘X’ is

1. $96\Omega$
2. $300\Omega$
3. $200\Omega$
4. $110\Omega$

Q.

In the given circuit, it is observed that the current I is independent of the value of the resistance $R_6.$ Then the resistance values must satisfy

(IIT-JEE 2001)

1. $R_1{R}_2{R}_5=R_3{R}_4{R}_6$

2. $\frac{1}{R_5}+\frac{1}{R_6}=\frac{1}{R_1+R_2}+\frac{1}{R_3+R_4}$
   

3. $R_1{R}_4=R_2{R}_3$

4. $R_1{R}_3=R_2{R}_4=R_5{R}_6$