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?
(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 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 |
Question 22
Question MCQ▾
The resultant resistance between the points A and B in the following figure will be –
Choices
Choice (4) | Response | |
---|---|---|
a. | 8 Ω | |
b. | 2 Ω | |
c. | 6 Ω | |
d. | 4 Ω |