Give the frequency ranges of the following (i) High frequency band (HF) (ii) Very high frequency band (VHF) (iii) Ultra high band (UHF) (iv) Super high frequency band (SHF).

Find out the wrong statement : i) As frequency increases photo current increases ii)As frequency increase KE increases iii)As frequency increase velocity of electrons increases iv)As frequency increase stopping potential increases v)As frequency is below a certain value photo electrons are not emitted.