Electronic Fundamentals

467. Diodes are:

• a) Conductors,
• b) Semi-conductors
• c) Insulators

468. For the intrinsic conductivity of diodes

• a) At 0 degrees Kelvin, a semiconductor is a non-conductor
• b) At 0 degrees Celsius, a semiconductor is a non-conductor
• c) At 0 degrees Kelvin, a semiconductor is a conductor

469. A junction diode

• a) Is similar to a vacuum diode but cannot rectify
• b) Has one p-n junction
• c) Can handle only very small currents

470. In a semiconductor junction diode, electrons are the minority carriers.

• a) Within the P region
• b) Within the N region
• c) In both the N and P regions

471. Forward voltage of a silicon diode is.

• a) 1.7V
• b) 0.7V
• c) 0.3V

472. A silicon diode, when compared to a germanium diode has

• a) Less forward bias voltage
• b) The same forward bias voltage
• c) A higher forward bias voltage

473. A germanium diode:

• a) Has the same threshold voltage as a silicon diode
• b) Has a higher threshold voltage than a silicon diode
• c) Has a lower threshold voltage than a silicon diode

474. Which diode has a lower forward bias voltage?

• a) Silicon
• b) Germanium
• c) Both have the same forward bias voltage

475. Single crystal semiconductor diodes consist of

• a) A semiconductive single crystal with a p−zone
• b) A semiconductive single crystal with a n−zone
• c) A semiconductive single crystal with a p−zone and an n− zone

476. In a forward biased diode, electrons leave the

• a) The anode
• b) The cathode
• c) The doped area