Absorber
Transmitter
Repeater
None of these
Radio
Mobile phone
Walky-talky
Loudspeaker
Ground wave
Ionospheric wave
Sky wave
Direct wave
EHF
UHF
VLF
VHF
Up to 2 MHz
From 2 MHz to 20 MHz
From 2 MHz to 30 MHz
From 2 MHz to 80 MHz
Atomic nature of semiconductor
Shape and atomic nature of semiconductor
Length of semiconductor
Shape of semiconductor
Resistive at resonant frequency
Resistive its resonant frequency
Capacitive
Inductive
Can be sent directly over the air for distance
Possess very high frequency
Cannot be sent directly over the air for large distance
None of the above
Fermi energy
Potential energy
Work function
Emission energy
AC to DC
DC to AC
Varying DC into constant dc
High voltage into low voltage and vice-versa
