MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
In the following figure, what is the value of I? |
| A. | I = IV + Ir |
| B. | I = IV – Ir |
| C. | I = IV Ir |
| D. | I = IV ⁄ Ir |
| Answer» B. I = IV – Ir | |
| 2. |
In fig 15.1, the terminals aa’ are used for _________ |
| A. | measuring the current flow through the circuit |
| B. | measuring the power dissipation of the circuit |
| C. | measuring the resistance of the circuit |
| D. | measuring the voltage drop across the resistance |
| Answer» E. | |
| 3. |
Fig 15.1 represents? |
| A. | construction of medium resistance |
| B. | construction of high resistance |
| C. | construction of low resistance |
| D. | construction of very low resistance |
| Answer» D. construction of very low resistance | |
| 4. |
How is the contact resistance related to the circuit while measuring a low resistance? |
| A. | independant of the type of the resistance |
| B. | it is negligible |
| C. | depends on the e.m.f source |
| D. | it is very high |
| Answer» C. depends on the e.m.f source | |
| 5. |
Which is the most popular method for measuring low resistance? |
| A. | ammeter-voltmeter method |
| B. | potentiometer method |
| C. | kelvin double bridge method |
| D. | ducter ohmmeter method |
| Answer» D. ducter ohmmeter method | |
| 6. |
Which is not a source of error in the measurement of low resistance? |
| A. | contact resistance drops at the leads |
| B. | thermal e.m.f |
| C. | temperature effect |
| D. | power dissipation through the circuit |
| Answer» B. thermal e.m.f | |
| 7. |
How is the voltage drop across a low resistance related to lead resistance? |
| A. | it contains contact resistance |
| B. | it depends on the magnitude of voltage drop |
| C. | it depends on the type of null detector used |
| D. | It does not contain any contact resistance |
| Answer» E. | |
| 8. |
What is the significance of measuring low resistances? |
| A. | voltage drop across the circuit is high |
| B. | contact and lead resistances are appreciable |
| C. | there is no power loss |
| D. | no current flows through the bridge circuit |
| Answer» C. there is no power loss | |
| 9. |
Low resistance refers to _________ |
| A. | resistances of the order of 1·øº |
| B. | resistances of the order of 1k·øº |
| C. | resistances of the order of 1m·øº |
| D. | resistances of the order of 1M·øº |
| Answer» B. resistances of the order of 1k¬¨‚àë‚àö‚à謨‚à´ | |