Electromagnetic Field Theory MCQ Questions & Answers | ECE

A. True

B. False

A. At waveguide can be coupled to a coaxial cable

B. At frequencies below the cut off value the wave progresses across the waveguide after total reflections

C. Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves

D. Waveguides can handle large power at UHF and microwaves

A. Rectangular conducting wire to propagate electromagnetic waves

B. Hollow rectangular walled room carrying electromagnetic wave

C. Hollow rectangular conducting tube through which electromagnetic waves can be propagat-ed

D. Tube antenna to transmit and receive electromagnetic waves

A. HF

B. VHF

C. UHF

D. VLF

A. Only

B. With a reflector

C. With one or more directors

D. With a reflector and one or more directors

A. Transmission efficiency

B. Front to back ratio

C. Loss coefficient

D. None of the above

A. 3 to 30 kHz

B. 300 to 3000 kHz

C. 3000 to 30000 MHz

D. 30000 to 300000 MHz

A. Zero

B. Unity

C. Infinity

D. None of the above

A. True

B. False

A. Microwave frequency

B. Medium frequency

C. Low frequency

D. High frequency