# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 474 - 477 of 2184

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## Passage

A battery is connected to a potentiometer obtained at 84 cm along the wire. When a resistance of 5Ω is connected as a shunt with the cell, the balance point is obtained at 70 cm.

## Question number: 474 (3 of 3 Based on Passage) Show Passage

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MCQ▾

### Question

Find the new position of the balance point when 5 Ω resistances is replaced by 4 Ω resistors.

### Choices

Choice (4) Response

a.

83.3 cm

b.

26.5 cm

c.

67.2 cm

d.

52 cm

## Question number: 475

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MCQ▾

### Question

Figure shows a balanced Wheatstone’s bridge. Which of the following sentences are correct for this figure? Wheatstone Bridge Circuit Diagram Figure shows the balanced Wheatstone bridge. P, Q, R and S are resistors of this bridge.

(1) If P is slightly increased, the current in the galvanometer flows from A to C.

(2) If P is slightly increased, the current in the galvanometer flows from C to A.

(3) If Q is slightly increased, the current in the galvanometer flows from C to A.

(4) If Q is slightly increased, the current in the galvanometer flows from A to C.

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

2 and 4

b.

1 and 3

c.

1 and 2

d.

1,2 and 3

## Question number: 476

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MCQ▾

### Question

Two resistances are connected in two gaps of a meter bridge. The balance point is 20 cm from the zero ends. A resistance of 15 ohms is connected in series with the smaller of the two. The null point shifts to 40 cm. The value of the smaller resistance in ohm is

### Choices

Choice (4) Response

a.

3

b.

12

c.

9

d.

6

## Question number: 477

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MCQ▾

### Question

The resultant resistance between the points A and B in the following figure will be – Network Circuit of 1Ω and 2Ω Resistors Here in above diagram 4 resistances connected in series and 4 resistances connected in parallel.

### Choices

Choice (4) Response

a.

8 Ω

b.

2 Ω

c.

6 Ω

d.

4 Ω