# Current Electricity-Potentiometer (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 6 - 9 of 17

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## Question number: 6

» Current Electricity » Potentiometer

MCQ▾

### Question

A potentiometer consists of a wire of length 4 m and resistance 10 Ω. It is connected to cell of emf 2 V. The potential difference per unit length of the wire will be

### Choices

Choice (4) Response

a.

2 V/m

b.

0.5 V/m

c.

10 V/m

d.

5 V/m

## Question number: 7

» Current Electricity » Potentiometer

Assertion-Reason▾

### Assertion (Ꭺ)

The emf of the driver cell in the potentiometer experiment should be greater than the emf of the cell to be determined.

### Reason (Ꭱ)

The fall of potential across the potentiometer wire should not be less than the emf of the cell to be determined.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

## Question number: 8

» Current Electricity » Potentiometer

MCQ▾

### Question

In the shown arrangement of the experiment of the meter bridge if AC corresponding to null deflection of galvanometer is x, what would be value of x if the radius of cross-sectional area the wire AB is doubled

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 9

» Current Electricity » Potentiometer

MCQ▾

### Question

A potentiometer has uniform potential gradient across it. Two cells connected in series (i) to support each other and (ii) to oppose each other are balanced over 6m and 2m respectively on the potentiometer wire. The emf of the cells are in the ratio of

### Choices

Choice (4) Response

a.

3: 1

b.

1: 2

c.

2: 1

d.

1: 1

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