CET Section IV

The ripple frequency of a full-wave rectifier circuit in a 60 Hertz power system would be:

• 60 Hz

• 120 Hz

• 400 Hz

• 800 Hz

Which of the following is true?

• Shorting the base to the emitter is almost sure to destroy the transistor if it is in a Class A amplifier circuit

• Shorting the base to the collector is almost sure to destroy the transistor

Which of the following statements is correct?

• The forward bias current for a transistor that is operating Class B will be greater than the forward bias on a transistor that is operating Class A

• The forward bias current for a transistor that is operating Class A will be greater than the forward bias on a transistor that is operating Class B

In the normal operation of a transistor, which junction is forward biased?

• The collector-base junction.

• The emitter-base junction.

Which of the following is not correct for AC beta?

• hfe=

• hFE=

Another name for a Darlington connection is:

• alpha squared

• beta squared

• gamma squared

• delta squared

• omega squared

For the amplifier shown in Figure 20, the output signal

• in phase with the input signal

• 180 degrees out of phase with the input signal

A ferrite bead behaves like:

• an inductor

• a temperature-sensing register

The emitter resistor in a bipolar transistor circuit is used for:

• reducing amplifier noise

• increasing the gain of the stage

• biasing the transistor

• stabilizing the stage against the effects of temperature change and against thermal runaway

• positive feedback

Removing the capacitor across an emitter resistor in a transistor amplifier will:

• increase the gain of the amplifier

• increase the amplifier frequency response