In a meter bridge, point D is a neutral point as shown in the figure.

 a. The meter bridge can have no other neutral point for this set of resistances. b. When the jockey contacts a point on the meter wire left of D, current flows to B from the wire. c. When the jockey contacts a point on the meter wire to the right of D, current flows from B to the wire through the galvanometer. d. When R is increased, the neutral point shifts to left.

Which of the above statements is correct?

1. (a, c)

2. (a, d)

3. (b, c)

4. (c, d)

Subtopic:  Meter Bridge & Potentiometer |
From NCERT
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

A resistance R is to be measured using a meter bridge. A student chooses the standard resistance S to be 100 $\mathrm{\Omega }$. He finds the null point at l= 2.9 cm. He is told to attempt to improve accuracy. Which of the following is a useful way?

 1 He should measure l1 more accurately 2 He should change S to 1000  Ω and repeat the experiment 3 He should change S to 3  Ω and repeat the experiment 4 He should give up hope of more accurate measurement with a meter bridge

Subtopic:  Meter Bridge & Potentiometer |
53%
From NCERT
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

Two cells of emf's approximately $$5$$ V and $$10$$ V are to be accurately compared using a potentiometer of length $$400$$ cm.

 1 The battery that runs the potentiometer should have a voltage of $$8$$ V 2 The battery of the potentiometer can have a voltage of $$15$$ V and $$R$$ adjusted so that the potential drop across the wire slightly exceeds $$10$$ V 3 The first portion of $$50$$ cm of the wire itself should have a potential drop of $$10$$ V 4 Potentiometer is usually used for comparing resistances and not voltages
Subtopic:  Meter Bridge & Potentiometer |
72%
From NCERT
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