MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Electronic Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The displacement flux density at a point on the surface of a perfect conductor is = 2( a x - 3 a z )c/m 2 pointing away from the surface. The charge density at that point c/m 2 will be |
| A. | 2 |
| B. | - 2 |
| C. | 4 |
| D. | - 4 |
| Answer» D. - 4 | |
| 2. |
Find the noise factor for an antenna at 27°C with equivalent noise temperature 30°K |
| A. | 20 |
| B. | 100 |
| C. | 300 |
| D. | 1.1 |
| Answer» E. | |
| 3. |
In a 100 turn coil, if the flux through each turn is ( t 3 - 2 t ) m W b , the magnitude of the induced emf in the coil at a time of 4 sec is |
| A. | 46 mV |
| B. | 56 mV |
| C. | 4.6 V |
| D. | 5.6 V |
| Answer» D. 5.6 V | |
| 4. |
A short circuited stub is shunt connected to a transmission line as shown in the figure is, if z 0 = 500 ohms, the admittance y seen at the function of the stub and the transmission line is |
| A. | (0.01 - j 0.02) mho |
| B. | (0.02 - j 0.01) mho |
| C. | (0.04 - j 0.02) mho |
| D. | (0.02 + j 0) mho |
| Answer» B. (0.02 - j 0.01) mho | |
| 5. |
A plane wave is characterized by the wave is |
| A. | linearly polarized |
| B. | circularly polarized |
| C. | elliptically polarized |
| D. | unpolarized |
| Answer» D. unpolarized | |
| 6. |
The electric field on the surface of a perfect conductor is 2V/m. The conductor is immersed in water with ? = 80 ? 0 . The surface charge density on the conductor is ((? 0 = 10 -9 /36 p )F/m) |
| A. | 0 c/m 2 |
| B. | 2 c/m 2 |
| C. | 1.8 x 10 -11 c/m 2 |
| D. | 1.14 x 10 -9 c/m 2 |
| Answer» E. | |
| 7. |
A hollow rectangular waveguide has dimensions a = 2 b . Calculate the amount of attenuation, if the frequency is 3 GHz, and b = 1 cm. |
| A. | 49 |
| B. | 47.33 |
| C. | 50.33 |
| D. | 50 |
| Answer» C. 50.33 | |
| 8. |
Charge needed within a unit sphere centred at the origin for producing a potential field, |
| A. | 12 p c |
| B. | 60 p c |
| C. | 120 p c |
| D. | 180 p c |
| Answer» D. 180 p c | |
| 9. |
For F 1 layer the maximum ionic density is 2.3 x 10 4 electrons per cc. The critical frequency for this layer will be |
| A. | 1.36 MHz |
| B. | 13.6 MHz |
| C. | 136 MHz |
| D. | 1360 MHz |
| Answer» C. 136 MHz | |
| 10. |
Refractive index of glass is 1.5. Find the wavelength of a beam of light with a frequency of 10 14 Hz in glass. Assume velocity of light is 3 x 10 8 m/sec in vacuum. |
| A. | 4 ?m |
| B. | 3 ?m |
| C. | 2 ?m |
| D. | 1 ?m |
| Answer» D. 1 ?m | |
| 11. |
The function f ( x - v ot ) represent which of the following? |
| A. | A stationary wave |
| B. | A wave motion in forward direction |
| C. | A wave motion in reverse direction |
| D. | None of the above |
| Answer» C. A wave motion in reverse direction | |