Q. when the total length of the two wires is a half wave length. The antenna is called :a) Dipole b) half wave dipole c) Doublet antenna d) noneQ Radiation resistance is a ratio of :a) Power radiated by antenna to the square of the currentStages of AM receiver: A. RF amp, Mixer, AF amp, Detector B. AF amp, ,IF amp, Mixer, Detector C. Mixer, .IF amp, Detector, AF amp D. RF amp, MIXER, IF amp, DETECTOR, AF ampwhich is correct about FM- A. require expensive equipment than AM B. FM 7 to 15 times channel require more than AM* C. in AM all powers are useful D. NoneMTCS - regarding PM:- A. PM vectors sometimes lead & sometimes lag with ref carrier vector B. AM remains constant C. ALLIn AM, the carrier is changed by a modulating signal. What parameter of the carrier is changed?

A.amplitude

B.frequency

C.pulse width

D.phase

If a 1 MHz carrier is amplitude modulated with a 5 kHz audio signal, the upper-side frequency is ________ kHz.

A.1005

B.1000

C.995

D.none of the above