Q.1

The total inductance of a series inductor circuit is:

  • equal to the sum of the individual inductance values
  • equal to the sum of the individual inductive-reactance values
  • less than the value of the smallest inductor
  • equal to the source voltage divided by total current
  • None of the above
Q.2

What is the inductive reactance of a 0.1-H coil that is operating atHz?

  • 100 Ohm
  • Less than 1 Ohm
  • 628 Ohm
  • 444 Ohm
  • None of the above
Q.3

Which one of the following is a statement of KirchhofFs voltage law?

  • None of the above
  • The total voltage in a parallel circuit is less than the value of the smallest voltage
  • The algebraic sum of voltages in a loop is equal to zero
  • The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
  • The algebraic sum of voltages entering and leaving a point is equal to zero
Q.4

An intrinsic semiconductor has some holes in it at room temperature. What causes these holes?

  • Doping
  • Valence electrons
  • Free electrons
  • Thermal energy
  • None of the above
Q.5

Which one of the following statements is true?

  • inductive reactance decreases with operating frequency
  • inductive reactance is at a maximum for dc source voltages
  • inductive reactance increases with operating frequency
  • There is no meaningful relationship between inductive reactance and operating frequency
  • None of the above
Q.6

A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

  • 3 V
  • 16 V
  • 7.5 V
  • 8 V
  • None of the above
Q.7

Which one of the following statements is true?

  • Power dissipation of a pure capacitor increases with operating frequency
  • Power dissipation of a pure capacitor decreases with operating frequency
  • There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency
  • All of the above
  • None of the above
Q.8

Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit?

  • Reluctance
  • Permeability
  • Permeance
  • Retentivity
  • There is no valid comparison
Q.9

A circuit has two different voltage sources that are connected in a series-aiding form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

  • 15 V
  • 16 V
  • 7.5 V
  • 8 V
  • None of the above
Q.10

How much current flows through a 0.micro F capacitor that is operating from a 12-V ac, 100-Hz source?

  • 0.151 mA
  • 157 raA
  • 0.995 mA
  • 2.02 A
  • None of the above
Q.11

Suppose the voltage from a power outlet isVrms. What is the peak voltage?

  • 100 V
  • 120 V
  • 170 V
  • 180 V
  • None of the above
Q.12

As the temperature increases, the current gain

  • increases
  • decreases
  • contant
  • can be any of the above
  • None of the above
Q.13

1 Microfarad is the same as:

  • 1 millionth of a picofarad
  • 1000 millifarads
  • 1 million picofarads
  • 1 million farads
  • None of the above
Q.14

Which one of the following principles best describes the basic operation of a generator?

  • Like magnetic poles repel; unlike poles attract
  • Current is induced in a conductor that is moving through a magnetic field
  • Like magnetic poles attract; unlike poles repel
  • Current flowing through a conductor generates a magnetic field
  • None of the above
Q.15

Which one of the following statements best applies to a series RLC circuit?

  • The voltage waveform for each component always has the same amplitude and phase as the applied voltage
  • The current waveform for each component always has the same amplitude and phase as the applied current
  • All of the above
  • The sum of the current is always less than the applied current
  • None of the above
Q.16

What is the algebraic sum of this series of values:+--6,+4?

  • -6
  • -3
  • 0
  • +2
  • None of the above
Q.17

The total inductive reactance of a parallel inductor circuit is:

  • equal to the sum of the individual inductive-reactance values
  • equal to the sum of the individual inductance values
  • equal to the source voltage divided by total current
  • less than the inductance value of the smallest inductor
  • None of the above
Q.18

When operating below its resonant frequency, a series RLC circuit has the characteristics of a:

  • series RL circuit
  • series RC circuit
  • series RLC circuit operated above its resonant frequency
  • purely resistive circuit
  • None of the above
Q.19

Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?

  • R = E2/P
  • P = PR
  • P = E2/R
  • I = P/E
  • None of the above
Q.20

The net charge of a neutral copper atom is

  • 0
  • +1
  • -1
  • +4
  • None of the above
Q.21

Which one of the following statements is true?

  • Current flows in a capacitor circuit only while ions are permitted to flow through the dielectric material
  • Current flows in a capacitor circuit only while the charge on the plates is large enough to force the dielectric to conduct electrons
  • Current can flow in a capacitor circuit, but not through the dielectric material itself
  • Power returned to the circuit is always greater than the power absorbed
  • None of the above
Q.22

The south pole of a magnet is the one:

  • that would be attracted to the earths north magnetic pole
  • that has its molecules arranged in a random pattern
  • that would be attracted to the earth's south magnetic pole
  • that would be repelled by the north pole of another magnet
  • None of the above
Q.23

The barrier potential accross each depletion layer is

  • 0
  • 0.8 V
  • 0.7 V
  • 20 V
  • None of the above
Q.24

What are the main parts of an atom?

  • Protons only
  • Electrons, protons, and ions
  • Electrons, ions, and neutrons
  • Electrons, protons, and neutrons
  • None of the above
Q.25

What is the difference between the kinds of charges for an electron and a proton?

  • An electron has a positive charge and a proton has no charge
  • An electron has a positive charge and a proton has a negative charge
  • An electron has a negative charge and a proton has a positive charge
  • An electron has a negative charge and a proton has no charge
  • None of the above
Q.26

Determine the resistance value and tolerance of a resistor that has the following color bands; first band is red, second band is red, third band is orange, and the fourth band is gold

  • 220 Ohm, 5%
  • 220 Ohm, 10%
  • 22,000 Ohm, 5%
  • 22, 000 Ohm, 10%
  • None of the above
Q.27

Which one of the following statements is true?

  • Power dissipation of a pure inductor decreases with operating frequency
  • Power dissipation of a pure inductor is at a maximum for dc source voltages
  • Power dissipation of a pure inductor increases with operating frequency
  • There is no meaningful relationship between the power dissipation of a pure inductor and its operating frequency
  • None of the above
Q.28

A zener diode has a voltage ofV and a current ofmA. What is the power dissipation?

  • 200 mW
  • 300 mW
  • 20 mW
  • 10 mW
  • None of the above
Q.29

The emitter diode is usually

  • Forward-biased
  • Reverse-biased
  • Nonconducting
  • Operating in the breakdwon region
  • None of the above
Q.30

A power transformer stepsV down toV. If the current in its primary winding is 2 A, what is the current in the secondary winding?

  • 50 A
  • 12 A
  • 5 A
  • 20 A
  • None of the above
0 h : 0 m : 1 s