84. The rms value for an ac wave is also sometimes called the:A. Absolute value.B. Direct-current value.C. Effective value.D. Equivalent value.E. Reactive value.

85. The gigabyte is a unit commonly used as a measure of:A. Data access time.B. Data frequency.C. Data transfer speed.D. Data storage capacity.E. Data communications accuracy.

86. In a parallel combination of light bulbs, if one bulb socket totallyshorts out:A. The circuit had better have a fuse or a circuit breaker.B. The other bulbs will burn out.C. The other bulbs will dim slightly, but stay lit.D. The current drawn from the source will decrease.E. None of the above.

87. A common lab multimeter cannot measure:A. Current.B. Frequency.C. Voltage.D. Resistance.E. It can measure any of the above.

88. In a P-channel JFET:A. The drain is positive with respect to the source.B. The gate must be grounded.C. The majority carriers are holes.D. The source receives the input signal.E. All of the above are true.

89. If you place a bar of iron inside a cylindrical coil of wire, and then run dcthrough the wire, you have:A. A rheostat.B. A permanent magnet.C. A flux meter.D. An electric generator.E. An electromagnet.

90. Admittance is a quantity expressing:A. Opposition to dc.B. Opposition to audio signals.C. Ease with which a circuit passes ac.D. The ratio of capacitance to inductance.E. The ratio of reactance to resistance.

91. In a common-emitter bipolar-transistor circuit:A. The collector is at signal ground.B. The output is taken from the base.C. The emitter is at signal ground.D. The bases of two transistors are connected together.E. The output is taken from the emitter.

92. In a certain resistance-capacitance (RC) circuit, the current leads the voltageby 45 degrees. The resistance is 50 ohms. The capacitive reactance is:A. 25 ohms.B. -25 ohms.C. 50 ohms.D. -50 ohms.E. Impossible to determine from this information.

93. The VA power is equal to the true power only when:A. A circuit has no resistance.B. A circuit has no impedance.C. A circuit has no reactance.D. The complex impedance is high.E. The phase angle is 45 degrees.

94. Binaural machine hearing can be advantageous over monaural machinehearing because the binaural scheme:A. Allows a robot to measure the frequency of a sound.B. Allows a robot to determine the amplitude of a sound.C. Allows a robot to tell from which direction a sound is coming.D. Allows a robot to ascertain the waveform of a sound.E. Allows a robot to interpret spoken commands.

95. The standard unit of inductance is the:A. Farad.B. Henry.C. Gilbert.D. Gauss.E. Tesla.

96. The output of an amplifier circuit is 20 V and the input is 5.0 V. The input andoutput impedances are identical. The circuit thus has a gain of:A. 4 dB.B. 6 dB.C. 12 dB.D. -4 dB.E. -6 dB.

97. An example of a device that converts electrical energy into visible radiantenergy is:A. A photocell.B. A phototransistor.C. A photovoltaic cell.D. A light-emitting diode.E. A speaker.

98. What is the function of bleeder resistors in a power supply?A. To regulate the current.B. To regulate the voltage.C. To protect the rectifier diodes against electromagnetic interference.D. To protect the rectifier diodes against current surges.

E. To discharge the filter capacitors after the supply is shut off.

99. A resistor of 100 ohms carries 333 mA dc. The power dissipated by thatresistor is:A. 300 mW.B. 3.33 W.C. 33.3 W.D. 3.33 W.E. 11.1 W.

100. The data in nonvolatile memory:A. Is stored on magnetic disks.B. Consists of analog waveforms.C. Is retained after the power is removed.D. Must pass through a modem before it can be understood by the CPU.E. Cannot be used by a microprocessor.