The battery connections required to forward bias PN junction are
Right Answer is:
+ve terminal to p and -ve terminal to n
SOLUTION
When the p-side of a p-n junction is connected to the positive terminal of a battery and the n-side is connected to the negative terminal of the battery or the applied source, then the p-n junction is said to be forward-biased.
Thus the battery connections required to forward bias PN junction are +ve terminal to p and -ve terminal to n.
⇒ In the forward biased p-n junction, the holes on the p-side are repelled by the positive terminal of the battery, and the electrons on the n-side are repelled by the negative terminal of the battery. Hence the majority of charge carriers move towards the junction.
⇒ The applied potential opposes the junction potential and hence the resistance or the width of the junction decreases.
⇒ Once the applied voltage, is greater than the barrier voltage (VB), the majority of charge carriers easily diffuse across the junction and the current flows through the diode.
⇒ When the applied voltage is further increased, the current through the diode increases.