MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Electromagnetic Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The inductance of a coaxial cable with inner radius a and outer radius b, from a distance d, is given bya) L = μd ln(b/a)/2πb) L = 2π μd ln(b/a)c) L = πd/ln(b/ |
| A. | L = μd ln(b/a)/2π |
| B. | L = 2π μd ln(b/a) |
| C. | L = πd/ln(b/a) |
| D. | L = 0 |
| Answer» B. L = 2π μd ln(b/a) | |
| 2. |
Find the inductance of a coil with turns 50, flux 3 units and a current of 0.5A |
| A. | 150 |
| B. | 300 |
| C. | 450 |
| D. | 75 |
| Answer» C. 450 | |
| 3. |
Calculate the mutual inductance of two tightly coupled coils with inductances 49H and 9H. |
| A. | 21 |
| B. | 58 |
| C. | 40 |
| D. | 49/9 |
| Answer» B. 58 | |
| 4. |
THE_INDUCTANCE_OF_A_COAXIAL_CABLE_WITH_INNER_RADIUS_A_AND_OUTER_RADIUS_B,_FROM_A_DISTANCE_D,_IS_GIVEN_BY?$ |
| A. | L = μd ln(b/a)/2π |
| B. | L = 2π μd ln(b/a) |
| C. | L = πd/ln(b/a) |
| D. | L = 0 |
| Answer» B. L = 2‚âà√¨‚àö√ë ‚âà√≠¬¨‚à´d ln(b/a) | |
| 5. |
FIND_THE_INDUCTANCE_OF_A_COIL_WITH_TURNS_50,_FLUX_3_UNITS_AND_A_CURRENT_OF_0.5A?$ |
| A. | 150 |
| B. | 300 |
| C. | 450 |
| D. | 75 |
| Answer» C. 450 | |
| 6. |
Calculate the mutual inductance of two tightly coupled coils with inductances 49H and 9H? |
| A. | 21 |
| B. | 58 |
| C. | 40 |
| D. | 49/9 |
| Answer» B. 58 | |
| 7. |
The inductance is proportional to the ratio of flux to current. State True/False. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
With unity coupling, the mutual inductance will be |
| A. | L1 x L2 |
| B. | L1/L2 |
| C. | ‚àö(L1 x L2) |
| D. | L2/L1 |
| Answer» D. L2/L1 | |
| 9. |
A coil is said to be loosely coupled with which of the following conditions? |
| A. | K>1 |
| B. | K<1 |
| C. | K>0.5 |
| D. | K<0.5 |
| Answer» E. | |
| 10. |
The equivalent inductance of two coils with series opposing flux having inductances 7H and 2H with a mutual inductance of 1H. |
| A. | 10 |
| B. | 7 |
| C. | 11 |
| D. | 13 |
| Answer» C. 11 | |
| 11. |
The expression for the inductance in terms of turns, flux and current is given by |
| A. | L = N dφ/di |
| B. | L = -N dφ/di |
| C. | L = Niφ |
| D. | L = Nφ/i |
| Answer» B. L = -N d‚âà√¨‚àö√∫/di | |
| 12. |
The equivalent inductances of two coils 2H and 5H in series aiding flux with mutual inductance of 3H is |
| A. | 10 |
| B. | 30 |
| C. | 1 |
| D. | 13 |
| Answer» E. | |
| 13. |
Calculate the emf of a coil with turns 100 and flux rate 5 units. |
| A. | 20 |
| B. | -20 |
| C. | 500 |
| D. | -500 |
| Answer» E. | |