Introduction to Diodes Multiple Choice Questions (MCQ) PDF Download

MCQ 1: During diffusion, decrease in energy level of conduction band in n region is due to loss of

1. lower energy electrons
2. 1st shell electrons
3. 2nd shell electrons
4. higher energy electrons

MCQ 2: If a block of Si is doped with a trivalent impurity atoms and other part with pentavalent impurity, a boundary is formed between n and p type, called

1. PN junction
2. pPN junction
3. pnn junction
4. pp junction

MCQ 3: Barrier potential for Si at 25°C is

1. 0.7 V
2. 0.9 V
3. 1.5 V
4. 3 V

MCQ 4: When PN junction is formed, n region loses free electrons as they diffuse across the junction, this create a layer of

1. positive charges
2. negative charges
3. neutron charges
4. photon charges

MCQ 5: Region near PN junction is depleted across junction is called

1. conduction region
2. floating region
3. pn region
4. depletion region