MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Tough Electromagnetic Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The minimum distance of the stub from the load side is 5 cm. Calculate the guided wavelength of the transmission line. |
| A. | 5 cm |
| B. | 2.5 cm |
| C. | 10 cm |
| D. | 1.25 cm |
| Answer» D. 1.25 cm | |
| 2. |
The capacitance per unit length and the characteristic impedance of a lossless transmission line are C and Z respectively. The velocity of a travelling wave on the transmission line is |
| A. | ZC |
| B. | 1/ZC |
| C. | Z/C |
| D. | C/Z |
| Answer» C. Z/C | |
| 3. |
A lossless line having 50 ohm characteristic impedance and length wavelength/4 is short circuited at one end connected to an ideal voltage source of 1V at the other end. The current drawn from the voltage sources is |
| A. | 0 |
| B. | 0.02 |
| C. | Infinity |
| D. | 50 |
| Answer» B. 0.02 | |
| 4. |
In an impedance Smith chart , a clockwise movement along a constant resistance circle gives rise to |
| A. | Decrease in reactance |
| B. | Increase in reactance |
| C. | No change in reactance |
| D. | No change in impedance |
| Answer» C. No change in reactance | |
| 5. |
For maximum power transfer, a lossless transmission line 50 ohm is to be matched to a resistive load impedance of 100 ohm. The characteristic impedance of the wavelength/4 transformer is |
| A. | 70.7 |
| B. | 50 |
| C. | 100 |
| D. | Infinity |
| Answer» B. 50 | |
| 6. |
For an electromagnetic wave incident from one medium to a second medium, total internal reflection takes place when |
| A. | Angle of incidence is equal to the Brewster angle with E field perpendicular to the plane of incidence |
| B. | Angle of incidence is equal to the Brewster angle with E field parallel to the plane of incidence |
| C. | Angle of incidence is equal to the critical angle with the wave moving from the denser to rarer medium |
| D. | Angle of incidence is equal to the critical angle with the wave moving from the rarer to denser medium |
| Answer» D. Angle of incidence is equal to the critical angle with the wave moving from the rarer to denser medium | |
| 7. |
In a good conductor the phase relation between the tangential components of electric E and the magnetic field H is as follows |
| A. | E and H are in phase |
| B. | E and H are out of phase |
| C. | H leads E by 90 |
| D. | E leads H by 45 |
| Answer» E. | |