The value of $$R$$ in the given circuit when there is no current in the $$5 ~\Omega$$ resistor is:

 1 $$12~\Omega$$ 2 $$9~ \Omega$$ 3 $$3~ \Omega$$ 4 $$2~ \Omega$$
Subtopic:  Wheatstone Bridge |
81%
From NCERT
NEET - 2024
Hints

The given circuit shows a uniform straight wire $$AB$$ of $$40 ~\text{cm}$$ length fixed at both ends. In order to get zero reading in the galvanometer $$G,$$ the free end of $$J$$ is to be placed from the end $$B$$ at:

1. $$32~\text{cm}$$
2. $$8~\text{cm}$$
3. $$16~\text{cm}$$
4. $$24~\text{cm}$$
Subtopic:  Wheatstone Bridge |
60%
From NCERT
NEET - 2024
Hints

A Wheatstone bridge is used to determine the value of unknown resistance $$\mathrm{X}$$ by adjusting the variable resistance $$\mathrm{Y}$$ as shown in the figure. For the most precise measurement of $$\mathrm{X}$$, the resistances $$\mathrm{P}$$ and $$\mathrm{Q}$$:

 1 do not play any significant role. 2 should be approximately equal to $$2\mathrm{X}$$. 3 should be approximately equal and are small. 4 should be very large and unequal.
Subtopic:  Wheatstone Bridge |
74%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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 |
74%
From NCERT
AIPMT - 2005
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Five equal resistances each of resistance $$R$$ are connected as shown in the figure below. A battery of $$V$$ volts is connected between $$A$$ and $$B$$. The current flowing in $$AFCEB$$ will be:

1. $$\frac{V}{R}$$
2. $$\frac{V}{2R}$$
3. $$\frac{2V}{R}$$
4. $$\frac{3V}{R}$$

Subtopic:  Wheatstone Bridge |
57%
From NCERT
AIPMT - 2004
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The resistance of each arm of the wheat stone bridge is $$10~ \Omega.$$ A resistance of $$10~ \Omega$$ is connected in series with a galvanometer. The equivalent resistance across the battery will be:
1.$$10~ \Omega$$
2.$$15~ \Omega$$
3. $$20~ \Omega$$
4. $$40~ \Omega$$

Subtopic:  Wheatstone Bridge |
79%
From NCERT
AIPMT - 2001
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints