Answer:
Due to electrons and holes moving away from the p-n junction
Step-by-step explanation:
Biasing a diode: This means applying voltage across the terminal of a diode.
Because of the p-n junction in the diode.
When a p-n junction is reversed biased, the negative terminal of the voltage supply is connected to the p-region of the diode and the positive terminal of the voltage supply connected to the n- region of the diode junction. Here the negative terminal of the voltage supply attracts holes away from the p- region of the junction while the positive terminal of the voltage source also attract electrons away from the n- region of the junction. At this point the holes and the electron stops moving away from the junction and the majority current carrier becomes zero.
Hence no current will flow through the diode