MCQOPTIONS
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MCQOPTIONS
This section includes 23 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Capacitance is directly proportional to__________ |
| A. | Area of cross section between the plates |
| B. | Distance of separation between the plates |
| C. | Both area and distance |
| D. | Neither area nor distance |
| Answer» B. Distance of separation between the plates | |
| 2. |
Which among the following equations is incorrect? |
| A. | Q=CV |
| B. | Q=C/V |
| C. | V=Q/C |
| D. | C=Q/V |
| Answer» C. V=Q/C | |
| 3. |
What will happen to the capacitor just after the source is removed? |
| A. | It will not remain in its charged state |
| B. | It will remain in its charged state |
| C. | It will start discharging |
| D. | It will become zero |
| Answer» C. It will start discharging | |
| 4. |
Tensile stress is equal to |
| A. | Force per unit volume |
| B. | Force per unit area |
| C. | Extension per unit area |
| D. | Extension per unit length |
| Answer» C. Extension per unit area | |
| 5. |
The capacitance and charge on the plates are |
| A. | directly related |
| B. | inversely related |
| C. | none of above |
| D. | not related at all |
| Answer» B. inversely related | |
| 6. |
The increase in kinetic energy of the car having mass 800 kg and velocities ranging from 20 ms-1 to 30 ms-1 is |
| A. | 500 KJ |
| B. | 300 KJ |
| C. | 200 KJ |
| D. | 400 KJ |
| Answer» D. 400 KJ | |
| 7. |
The work done in charging a capacitor is given by |
| A. | 2QV |
| B. | (1⁄2)QV |
| C. | 2V |
| D. | QV |
| Answer» C. 2V | |
| 8. |
The mechanical waves include |
| A. | light |
| B. | sound |
| C. | UV waves |
| D. | em waves |
| Answer» C. UV waves | |
| 9. |
1eV is equal to |
| A. | 2.0 * 10-20 J |
| B. | 1.60 * 10-19 J |
| C. | 4 J |
| D. | 3 J |
| Answer» C. 4 J | |
| 10. |
If the particles of medium vibrate at right angles to the direction of velocity then wave is |
| A. | transverse |
| B. | longitudinal |
| C. | sound |
| D. | abrupt |
| Answer» B. longitudinal | |
| 11. |
If we get a straight line with positive slope then it's acceleration is |
| A. | decreasing |
| B. | increasing |
| C. | constant |
| D. | zero |
| Answer» D. zero | |
| 12. |
The molar gas constant has the value |
| A. | 8 Jmol-1K-1 |
| B. | 7 Jmol-1K-1 |
| C. | 5 Jmol-1K-1 |
| D. | 8.31 Jmol-1K-1 |
| Answer» E. | |
| 13. |
In transformer, the core is made up of soft iron in order to pass the maximum |
| A. | current |
| B. | flux |
| C. | voltage |
| D. | magnetic flux |
| Answer» E. | |
| 14. |
WHICH_AMONG_THE_FOLLOWING_EQUATIONS_IS_INCORRECT??$ |
| A. | Q=CV |
| B. | Q=C/V |
| C. | V=Q/C |
| D. | C=Q/V |
| Answer» C. V=Q/C | |
| 15. |
Capacitance is directly proportional to__________$ |
| A. | Area of cross section between the plates |
| B. | Distance of separation between the plates |
| C. | Both area and distance |
| D. | Neither area nor distance |
| Answer» B. Distance of separation between the plates | |
| 16. |
What will happen to the capacitor when the source is removed? |
| A. | It will not remain in its charged state |
| B. | It will remain in its charged state |
| C. | It will start discharging |
| D. | It will become zero |
| Answer» C. It will start discharging | |
| 17. |
Unit of capacitance is___________ |
| A. | Volts |
| B. | Farad |
| C. | Henry |
| D. | Newton |
| Answer» C. Henry | |
| 18. |
What is the value of capacitance of a capacitor which has a voltage of 4V and ha 8C of charge? |
| A. | 2F |
| B. | 4F |
| C. | 6F |
| D. | 8F |
| Answer» B. 4F | |
| 19. |
Air has a dielectric constant of ___________ |
| A. | Unity |
| B. | Zero |
| C. | Infinity |
| D. | Hundread |
| Answer» B. Zero | |
| 20. |
Capacitors charge and discharge in __________ manner. |
| A. | Linear |
| B. | Constant |
| C. | Square |
| D. | Exponential |
| Answer» E. | |
| 21. |
Calculate the time constant of a series RC circuit consisting of a 100microF capacitor in series with a 100ohm resistor. |
| A. | 0.1 sec |
| B. | 0.1 msec |
| C. | 0.01 sec |
| D. | 0.01 msec |
| Answer» D. 0.01 msec | |
| 22. |
When the supply frequency increases, what happens to the capacitive reactance in the circuit? |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | Becomes zero |
| Answer» C. Remains the same | |
| 23. |
A power factor of a circuit can be improved by placing which, among the following, in a circuit? |
| A. | Inductor |
| B. | Capacitor |
| C. | Resistor |
| D. | Switch |
| Answer» C. Resistor | |