Current Electricity-Wheatstone Bridge [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 1 - 4 of 19
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Question 1
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 2
Question MCQ▾
In the adjoining network of resistors, each is of resistance r ohm, the equivalent resistance between points A and B is-
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | r | |
c. | 5r | |
d. |
Question 3
Question MCQ▾
Five resistors are connected as shown in the diagram. The equivalent resistance between A and B is
Choices
Choice (4) | Response | |
---|---|---|
a. | 12 Ω | |
b. | 6 Ω | |
c. | 15 Ω | |
d. | 9 Ω |
Question 4
Question MCQ▾
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 |