Current Electricity [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 20 - 22 of 291

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Question 20

Question MCQ▾

Figure shows a balanced Wheatstone՚s bridge. Which of the following sentences are correct for this figure?

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

Edit

Question 21

Question MCQ▾

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

Edit

Question 22

Question MCQ▾

The resultant resistance between the points A and B in the following figure will be –

Network Circuit of 1Ω and 2Ω Resistors

Choices

Choice (4)Response

a.

8 Ω

b.

2 Ω

c.

6 Ω

d.

4 Ω

Edit