Current Electricity-Wheatstone Bridge (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 4 of 7

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Question number: 1

» Current Electricity » Wheatstone Bridge

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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

Wheatstone Bridge Circuit Diagram

(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: 2

» Current Electricity » Wheatstone Bridge

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MCQ▾

Question

In the adjoining network of resistors, each is of resistance r ohm, the equivalent resistance between points A and B is-

Circuit Diagram with five equal resistors

Circuit Diagram with Five Equal Resistors

Choices

Choice (4)Response

a.

b.

r

c.

5r

d.

Question number: 3

» Current Electricity » Wheatstone Bridge

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MCQ▾

Question

Five resistors are connected as shown in the diagram. The equivalent resistance between A and B is

Bridge circuit diagram

Bridge Circuit Diagram

Choices

Choice (4)Response

a.

12 Ω

b.

6 Ω

c.

15 Ω

d.

9 Ω

Question number: 4

» Current Electricity » Wheatstone Bridge

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MCQ▾

Question

Which is correct statements?

(1) The Wheatstone bridge is most sensitive when all the four resistances are of the same order

(2) Kirchhoff’s first law (for currents meeting at a junction in an electric circuit) expresses the conservation of charge.

(3) The rheostat can be used as a potential divider.

(4) In a balanced Wheatstone bridge, interchanging the positions of galvanometer and cell affects the balance of the bridge.

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

Choices

Choice (4)Response

a.

1 and 3

b.

1,2 and 3

c.

1 and 2

d.

2 and 4

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