In a radio receiver, the short wave and medium wave station are tuned by using the same capacitoer butcoils of different inductance `L_(s)` and `L_(m)` respectively then

Long distance radio broadcasts use short wave bands. Explain why?

Long distance short - wave radio frequency broadcasting uses:

A : Long distance radio broadcasts use short-wave bands. R : Ionosphere reflectes waves in these bands.

Three solenoid coils of same dimension, same number of turns and same number of layers of windings are taken. Coil 1 with inductance L_(1) was would using a wire of resistance 11Omega//m , coil 2 with inductance L_(2) was wound using the similar wire but the direction of winding was reversed in each layer, coil 3 with inductance L_(3) was wound using a superconducting wire. The self-inductance of the coils L_(1),L_(2) and L_(3) are

Long distance short-wave radio broadcasting uses

The maximum range for the tropospheric transmission of radio wave of wavelength 3m using the transmitting antenna and receiving antenna of heights 100 m and 60 m respectively is