Question

On reverse biasing the pn junction, its potential barrier becomes

Answer 1

Higher or you can say more than before

Answer 2

Due to diffusion free electrons diffuse from n type to p type and holes diffuse from p type to n type

Due to this a layer off positive charge built on n side and negative charge over p side

As a result, potential difference is set up across pn junctiin which prevents further diffusion of charge carriers which is called potential barrier

As reverse voltage supports potential barrier and effective barrier potential increases

As a result width of depletion layer increases