The net resistance of the circuit between $$A$$ and $$B$$ is:

 1 $$\frac{8}{3}~\Omega$$ 2 $$\frac{14}{3}~\Omega$$ 3 $$\frac{16}{3}~\Omega$$ 4 $$\frac{22}{3}~\Omega$$
Subtopic:  Wheatstone Bridge |
89%
From NCERT
AIPMT - 2000
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What is the equivalent resistance between points $$a$$ and $$b$$, if the value of each resistance is $$R$$?

 1 $$7R$$ 2 $$5R$$ 3 $$4R$$ 4 $$3R$$
Subtopic:  Wheatstone Bridge |
88%
From NCERT
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In the circuit shown in the figure below, the current supplied by the battery is:

1. $$2$$ A
2. $$1$$ A
3. $$0.5$$ A
4. $$0.4$$ A

Subtopic:  Wheatstone Bridge |
88%
From NCERT
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In a Wheatstone bridge, all four arms have equal resistance $$R.$$ If the resistance of the galvanometer arm is also $$R,$$ the equivalent resistance of the combination is:

 1 $$R/4$$ 2 $$R/2$$ 3 $$R$$ 4 $$2R$$
Subtopic:  Wheatstone Bridge |
85%
From NCERT
AIPMT - 2003
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In the circuit shown in the figure below, if the potential difference between $$B$$ and $$D$$ is zero, then value of the unknown resistance $$X$$ is:

 1 $$4~\Omega$$ 2 $$2~\Omega$$ 3 $$3~\Omega$$ 4 EMF of a cell is required to find the value of $$X$$
Subtopic:  Wheatstone Bridge |
82%
From NCERT
PMT - 1986
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Three resistances $$\mathrm P$$, $$\mathrm Q$$, and $$\mathrm R$$, each of $$2~\Omega$$ and an unknown resistance $$\mathrm{S}$$ form the four arms of a Wheatstone bridge circuit. When the resistance of $$6~\Omega$$ is connected in parallel to $$\mathrm{S}$$, the bridge gets balanced. What is the value of $$\mathrm{S}$$?

 1 $$2~\Omega$$ 2 $$3~\Omega$$ 3 $$6~\Omega$$ 4 $$1~\Omega$$
Subtopic:  Wheatstone Bridge |
81%
From NCERT
AIPMT - 2007
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Figure $$(a)$$ below shows a Wheatstone bridge in which $$P,Q,R,S$$ are fixed resistances, $$G$$ is a galvanometer, and $$B$$ is a battery. For this particular case, the galvanometer shows zero deflection. Now, only the positions of $$B$$ and $$G$$ are interchanged. as shown in figure $$(b).$$ The new deflection of the galvanometer:

 1 is to the left 2 is to the right 3 is zero 4 depends on the values of $$P,Q,R,S$$
Subtopic:  Wheatstone Bridge |
78%
From NCERT
Hints

The resistances of the four arms $$P,Q,R~\text{and}~S$$ in a Wheatstone’s bridge are $$10~\Omega,30~\Omega,30~\Omega$$ and $$90~\Omega$$ respectively. The emf and internal resistance of the cell are $$7~\text{volt}$$ and $$5~\Omega$$ respectively. If the galvanometer resistance is $$50~\Omega$$ the current drawn from the cell will be:
1. $$0.2~\text{A}$$
2. $$0.1~\text{A}$$
3. $$2.0~\text{A}$$
4. $$1.0~\text{A}$$

Subtopic:  Wheatstone Bridge |
76%
From NCERT
AIPMT - 2013
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In the figure shown, each resistor has resistance $$R.$$ Match Column I and Column II.

 Column I Column II (A) Equivalent resistance between $$a$$ and $$b$$ (P) $$\dfrac{R}{2}$$ (B) Equivalent resistance between $$a$$ and $$c$$ (Q) $$\dfrac{5R}{8}$$ (C) Equivalent resistance between $$b$$ and $$d$$ (R) $$R$$

 1 A → P, B → Q, C → R 2 A → Q, B → P, C → R 3 A → R, B → P, C → Q 4 A → R, B → Q, C → P
Subtopic:  Wheatstone Bridge |
74%
From NCERT
Hints

For the network shown in the figure below, the value of the current $$i$$ is:

1. $$\frac{18V}{5}$$
2. $$\frac{5V}{9}$$
3. $$\frac{9V}{35}$$
4. $$\frac{5V}{18}$$

Subtopic:  Wheatstone Bridge |
73%
From NCERT
AIPMT - 2005
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