MCQOPTIONS
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MCQOPTIONS
This section includes 117 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Which of the following can have negative temperature coefficient _____________? |
| A. | Compounds of silver |
| B. | Liquid metals |
| C. | Metallic alloys |
| D. | Electrolytes |
| Answer» E. | |
| 102. |
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open_________________? |
| A. | there will be heavy current in the main line |
| B. | rest of the two bulbs will not light |
| C. | all three bulbs will light |
| D. | the other two bulbs will light |
| Answer» E. | |
| 103. |
The insulation on a current carrying conductor is provided__________? |
| A. | to prevent leakage of current |
| B. | to prevent shock |
| C. | both of above factors |
| D. | none of above factors |
| Answer» D. none of above factors | |
| 104. |
Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across______________? |
| A. | Rl |
| B. | Ri |
| C. | either Rl or Ri |
| D. | none of them |
| Answer» B. Ri | |
| 105. |
The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true_______________? |
| A. | The current through each bulb in same |
| B. | The voltage across each bulb is not same |
| C. | The power dissipation in each bulb is not same |
| D. | None of the above |
| Answer» B. The voltage across each bulb is not same | |
| 106. |
A closed switch has a resistance of_____________? |
| A. | zero |
| B. | about 50 ohms |
| C. | about 500 ohms |
| D. | infinity |
| Answer» B. about 50 ohms | |
| 107. |
The hot resistance of the bulb’s filament is higher than its cold resistance because the temperature co-efficient of the filament is___________________? |
| A. | zero |
| B. | negative |
| C. | positive |
| D. | about 2 ohms per degree |
| Answer» D. about 2 ohms per degree | |
| 108. |
The thickness of insulation provided on the conductor depends on_____________? |
| A. | the magnitude of voltage on the conductor |
| B. | the magnitude of current flowing through it |
| C. | both A. and (b) |
| D. | none of the above |
| Answer» B. the magnitude of current flowing through it | |
| 109. |
In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains______________? |
| A. | length of heating element should be decreased |
| B. | length of heating element should be increased |
| C. | length of heating element has no effect on heating if water |
| D. | none of the above |
| Answer» B. length of heating element should be increased | |
| 110. |
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will__________ |
| A. | decrease |
| B. | increase |
| C. | remain same |
| D. | heater will burn out |
| Answer» C. remain same | |
| 111. |
Which of the following quantities remain the same in all parts of a series circuit ____________? |
| A. | Voltage |
| B. | Current |
| C. | Power |
| D. | Resistance |
| Answer» C. Power | |
| 112. |
Nichrome wire is an alloy of_____________? |
| A. | lead and zinc |
| B. | chromium and vanadium |
| C. | nickel and chromium |
| D. | copper and silver |
| Answer» D. copper and silver | |
| 113. |
When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will___________? |
| A. | decrease |
| B. | increase |
| C. | remain constant |
| D. | none of the above |
| Answer» C. remain constant | |
| 114. |
1 angstrom is equal to______________? |
| A. | 10-8 mm |
| B. | 10″6 cm |
| C. | 10″10 m |
| D. | 10~14 m |
| Answer» D. 10~14 m | |
| 115. |
One newton meter is same as_____________? |
| A. | one watt |
| B. | one joule |
| C. | five joules |
| D. | one joule second |
| Answer» C. five joules | |
| 116. |
When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________? |
| A. | 1 n-mho |
| B. | 106 mho |
| C. | 1 milli-mho |
| D. | none of the above |
| Answer» B. 106 mho | |
| 117. |
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes______________? |
| A. | 0.4 ohm |
| B. | 0.6 ohm |
| C. | 0.8 ohm |
| D. | 1.0 ohm |
| Answer» B. 0.6 ohm | |