MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A parallel plate capacitor is connected to a DC source. Now the plates are allowed to move a small displacement under the influence of force of attraction between the two plates. As a result ___________? |
| A. | charge on the plates increases |
| B. | charge on plates remains constant |
| C. | energy stored increases |
| D. | energy stored remains constant |
| Answer» B. charge on plates remains constant | |
| 2. |
A parallel plate capacitor has an electrode area of 1000 mm2, with a spacing of 0.1 mm between the electrodes. The dielectric between the plates is air with a permittivity of 8.85‚àó10-12 F/m. The charge on the capacitor is 100 v. The stored energy in the capacitor is ____________$ |
| A. | 44.3 J |
| B. | 444.3 nJ |
| C. | 88.6 nJ |
| D. | 44.3 nJ |
| Answer» D. 44.3 nJ | |
| 3. |
The area of two parallel plates is doubled and the distance between these plates is also doubled. The capacitor voltage is kept constant. Under these conditions, force between the plates of this capacitor __________ |
| A. | decreases |
| B. | increases |
| C. | reduce to half |
| D. | gets doubled |
| Answer» E. | |
| 4. |
A parallel plate capacitor is charged and then the DC supply is disconnected. The plate separation is then increased. Between the plates, |
| A. | electric field intensity is unchanged |
| B. | flux density decreases |
| C. | potential difference decreases |
| D. | energy stored increases |
| Answer» D. energy stored increases | |
| 5. |
A parallel plate capacitor is changed and then the DC supply is disconnected. Now plate separation is allowed to decrease due to force of attraction between the two plates. As a consequence __________ |
| A. | charge on the plate increases |
| B. | charge on the plates remain constant |
| C. | capacitance C increases |
| D. | capacitance C remains constant |
| Answer» D. capacitance C remains constant | |
| 6. |
A parallel plate capacitor has a capacitance of 10μF. If the linear dimensions of the plates are doubled and distance between them is also doubled, the new value of capacitance would be __________ |
| A. | 10μF |
| B. | 20μF |
| C. | 5μF |
| D. | 40μF |
| Answer» C. 5‚âà√≠¬¨‚à´F | |