Question

How should a junction diode be connected to a battery to keep it
backwards?​

Answer 1

Explanation:

A diode can be connected to a battery in two ways, either forward or reversed- biased. First is reverse-bias, the anode of the diode to negative terminal of the battery and the cathode to the positive terminal of the battery. Second method is forward bias, to connect the anode of the diode to the positive terminal of the battery and the cathode to the negative terminal of the battery.

Answer 2

Backward biased junction:

Explanation:

• When a diode is connected in a very Reverse Bias condition, a positive voltage is applied to the N-type material and a negative voltage is applied to the P-type material.

• The positive voltage applied to the N-type material attracts electrons towards the positive conductor and far from the junction, whereas the holes within the P-type finish are attracted far from the junction towards the negative conductor.

• The net result's that the depletion layer grows wider because of an absence of electrons and holes and presents a high resistance path, virtually Associate in Nursing stuff and a high potential barrier is formed across the junction so preventing current from flowing through the semiconductor material.

Increase within the Depletion Layer because of Reverse Bias:

• This condition represents a high resistance price to the PN junction and much zero current flows through the junction diode with a rise in bias voltage. However, an awfully little reverse leak current will flow through the junction which might usually be measured in micro-amperes, ( μA ).

• One final purpose, if the reverse bias voltage Vr applied to the diode is magnified to a sufficiently high enough price, it'll cause the diode’s PN junction to overheat and fail because of the avalanche impact around the junction. this could cause the diode to become shorted and can end in the flow of most circuit current, and this shown as a step downward slope within the reverse static characteristics curve below.

Refer to the following attachment: