MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Measurements knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How to minimize the drift in the value of resistance measured using a Wheatstone bridge? |
| A. | by using a high precision null detector |
| B. | by keeping the lead wire resistances within 0.2 mΩ |
| C. | by using a e.m.f source of minimum value |
| D. | by minimizing the flow of current |
| Answer» C. by using a e.m.f source of minimum value | |
| 2. |
Why a Wheatstone bridge can’t be used for signal conditioning? |
| A. | due to the galvanometer |
| B. | due to excessive current flow |
| C. | due to the e.m.f source used |
| D. | due to lead wires |
| Answer» E. | |
| 3. |
Wheatstone bridge can’t be used for measurement of _________ |
| A. | high resistance |
| B. | medium resistance |
| C. | low resistance |
| D. | accurate resistance |
| Answer» B. medium resistance | |
| 4. |
HOW_TO_MINIMIZE_THE_DRIFT_IN_THE_VALUE_OF_RESISTANCE_MEASURED_USING_A_WHEATSTONE_BRIDGE??$ |
| A. | by using a high precision null detector |
| B. | by keeping the lead wire resistances within 0.2 mΩ |
| C. | by using a e.m.f source of minimum value |
| D. | by minimizing the flow of current |
| Answer» C. by using a e.m.f source of minimum value | |
| 5. |
Why a Wheatstone bridge can’t be used for signal conditioning?# |
| A. | due to the galvanometer |
| B. | due to excessive current flow |
| C. | due to the e.m.f source used |
| D. | due to lead wires |
| Answer» E. | |
| 6. |
What is the effect of lead wires on the Wheatstone bridge? |
| A. | no effect |
| B. | stabilizes the system |
| C. | desensitizes the system |
| D. | increases the resistance of the circuit |
| Answer» D. increases the resistance of the circuit | |
| 7. |
A Wheatstone bridge may not give accurate readings if _________ |
| A. | it is not balanced |
| B. | it is balanced |
| C. | the voltage drop across the circuit is maximum |
| D. | excessive current flows through the circuit |
| Answer» B. it is balanced | |
| 8. |
Effect of high dc on Wheatstone bridge. |
| A. | no effect |
| B. | not susceptible |
| C. | burns the circuit |
| D. | increases the temperature |
| Answer» C. burns the circuit | |
| 9. |
What is the effect of heat on the resistances in a Wheatstone bridge? |
| A. | no effect |
| B. | increases the voltage drop across the circuit |
| C. | decreases the current flowing through the circuit |
| D. | causes a permanent change in the resistance values |
| Answer» E. | |
| 10. |
What is the effect of galvanometer on measurement of high resistance? |
| A. | no effect |
| B. | depends on the e.m.f source |
| C. | galvanometer becomes insensitive to imbalance |
| D. | depends on the type of galvanometer used |
| Answer» D. depends on the type of galvanometer used | |
| 11. |
Cost of maintenance of Wheatstone bridge is _________ |
| A. | low |
| B. | high |
| C. | depends on the components |
| D. | depends on the source e.m.f |
| Answer» C. depends on the components | |
| 12. |
Wheatstone bridge can’t be used for measurement of |
| A. | high resistance |
| B. | medium resistance |
| C. | low resistance |
| D. | accurate resistance |
| Answer» B. medium resistance | |