1. A loop antenna is a commonly used for A. Radar B. Direction finding C. Satellite communication D. All of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
2. The divergence of a vector is a scalar, while the curl of a vector is another A. Scalar B. Vector C. Unit vector D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
3. Which antenna is a wideband antenna? A. Hertz antenna B. Marconi antenna C. Folded dipole D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
4. The potential that appears at a point in space due to the current which caused it is called potential A. Accelerating B. Retardation C. Oscillating D. Lagging the current Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
5. The minimum height of outer atmosphere is A. 100 km B. 150 km C. 200 km D. 400 km Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
6. The radiation pattern of a parabola antenna is A. Omnidirectional B. A figure of directional C. Highly directional D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
7. The virtual height of an ionospheric layer is __________ true height A. Equal to B. Less than C. Higher than D. No relation Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
8. The transmitting antennas for lower frequencies (below 500 kHz) are generally A. Vertical grounded wire type B. Horizontal suspended wire type C. Parabolic reflector type D. Any of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
9. Which of the following will increase the antenna radiation efficiency? A. Use of larger section of conductor B. Providing insulation on conductor C. Top loading of antenna D. Any of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
10. According to maximum power transfer theorem, the maximum power is absorbed by one network from another network when A. The impedance of one of the networks is half that of the other B. The impedance of one is the complex conjugate of the other C. The impedance of one is equal to that of the other D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
