SEMICON - BANAL

The average value of a half-wave rectified voltage with a peak value of 200 V is

• a. 0 V
• b. 127.3 V
• c. 141 V
• d. 63.7 V

A varactor diode exhibits

• a. a constant capacitance over a range of reverse voltages
• b. a variable capacitance that depends on forward current
• c. a variable resistance that depends on reverse voltage
• d. a variable capacitance that depends on reverse voltage

Find Id1

• a. 28. 18 mA
• b. 14.09 mA
• c. 56.36 mA
• d. 7.05 mA

What causes the process called junction recombination to occur when N and P materials are joined together?

• a. The development of an electrostatic field on each side of the junction
• b. The loss of electrons to the depletion region
• c. The generation of heat which causes the electrons to bombard the holes at the junction
• d. The diffusion of electrons and holes moving across the junction into the two materials

Which of the following solid-state devices has both gain and fast-switching capabilities?

• a. Zener diode
• b. Junction diode
• c. Tunnel diode
• d. Point-contact diode

Holes in an n-type semiconductor are

• a. minority carriers that are produced by doping
• b. minority carriers that are thermally produced
• c. majority carriers that are thermally produced
• d. majority carriers that are produced by doping

After the junction recombination process has reached equilibrium, what is the area that surrounds the junction called?

• a. The depletion region
• b. The free ion space
• c. The anode
• d. The electrostatic field

Find I1

• a. 14.09 mA
• b. 7.05 mA
• c. 56.36 mA
• d. 28. 18 mA

When a diode is forward-biased, the anode voltage

• a. is negative relative to the cathode voltage.
• b. is the same as the cathode voltage.
• c. is positive relative to the cathode voltage.
• d. alternates between positive and negative relative to the cathode voltage.

When replacing a diode in a circuit, which of the following safety precautions should you observe in removing the diode from the circuit?

• a. Do not use excessive heat to remove the diode
• b. Do not pry the diode from the circuit
• c. Do not remove the diode from the circuit while voltage is applied
• d. All of the choices are correct