Which of the following is true about PN junctions? Select all that apply. The PN

Question

Which of the following is true about PN junctions? Select all that apply. The PN junction is what gives diodes and transistors their fundamental O The built-in electric field in a PN junction is the cause of the drift current in a PN junction. Even though P and N type materials are electrically neutral, when combined they create a voltage, called the bias voltage. Current flows freely through the PN junction even under small reverse bias voltages A PN junction will be destroyed if the reverse bias breakdown voltage is exceeded

Explanation / Answer

Answer:

a) Yes pn junction gives diodes and transistors their fundamental property. True

b) drift current is flow of electrons and holes in response of applied electric field (not in built) False

c)biasing pn junction means applying positive voltage (external) to overcome barrier potential.False

d)in ideal diode all current is blocked in reverse bias condition.False

e)zener diode uses reverse breakdown to give constant voltage . so reverse breakdown do not destroy pn junction False

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