MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In the Wheatstone bridge given below, what should be values of R1 and R2 so that the bridge is balanced? |
| A. | R1 = 6 ohms; R2 = any finite value |
| B. | R1 = 6 ohms; R2 = 3 ohms |
| C. | R1 = 29.4; R2 = 2 ohms |
| D. | R1 = any finite value; R2 = 3 ohms |
| Answer» B. R1 = 6 ohms; R2 = 3 ohms | |
| 2. |
Identify the definition of sensitivity of a galvanometer from the following. |
| A. | Ratio of unit change in unknown resistance to the deflection in the galvanometer |
| B. | Ratio of unit change in unknown resistance to twice the deflection in the galvanometer |
| C. | Ratio of deflection in the galvanometer to the unit change in unknown resistance |
| D. | Ratio of deflection in the galvanometer to half the unit change in unknown resistance |
| Answer» D. Ratio of deflection in the galvanometer to half the unit change in unknown resistance | |
| 3. |
The equation of a balanced Wheatstone bridge is PR = QS. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Which instrument is used as the null detector in the Wheatstone bridge? |
| A. | Voltmeter |
| B. | Ammeter |
| C. | Galvanometer |
| D. | Multimeter |
| Answer» D. Multimeter | |
| 5. |
The values of resistances P, Q, R, and S of a Wheatstone bridge are 20, 15, 30, and 35 ohms respectively. Calculate the current passing through the battery of negligible resistance. |
| A. | 0.36A |
| B. | 22.22A |
| C. | 0.25A |
| D. | 0.45A |
| Answer» E. | |
| 6. |
How many resistances are used in a Wheatstone bridge? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» C. 5 | |