Age 2A672 (Vol 1)

88 Questions | By Lo973k3p | Last updated: Mar 19, 2022 | Total Attempts: 211

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1.

(001) What is the simplest form of matter?
- A.
  
  Mixture.
- B.
  
  Electrons.
- C.
  
  Element.
- D.
  
  Compund.
2.

(001) In an atom, what electrons contain the most energy?
- A.
  
  Valence electrons.
- B.
  
  Orbiting electrons.
- C.
  
  K shell electrons.
- D.
  
  The energy is shared equally by all electrons.
3.

(001) If there are eight electrons in the outer most shell of an atom, then it is considered
- A.
  
  Charged.
- B.
  
  Stable.
- C.
  
  Unstable.
- D.
  
  Complete.
4.

(001) Atoms having more than four electrons, but less than eight are known as
- A.
  
  Insulators.
- B.
  
  Conductors.
- C.
  
  Stable atoms.
- D.
  
  Semiconductors.
5.

(001) The electrostatic fields around a positive ion move
- A.
  
  Inward.
- B.
  
  Inward, then outward.
- C.
  
  Outward.
- D.
  
  Outward, then inward.
6.

(001) The force required to move free electrons through a conductor is known as
- A.
  
  Current.
- B.
  
  Negative charge.
- C.
  
  Voltage.
- D.
  
  Electrostatic force.
7.

(002) What are factors that affect the resistance of a material?
- A.
  
  Area, weight, and state of material.
- B.
  
  Temperature, weight, and state of material.
- C.
  
  Area, temperature, and type of material.
- D.
  
  Temperature, type of material, and state of material.
8.

(002) What is the resistance in a circuit if the power rating is 40 watts and total current is 2 amps?
- A.
  
  40 ohms.
- B.
  
  10 ohms.
- C.
  
  20 ohms.
- D.
  
  0.5 ohms.
9.

(002) In a series-parallel circuit, find RT (total resistance) if series resistor R1 = 7 ohms, and parallel resistors R2 and R3 = 8 ohms.
- A.
  
  23 ohms.
- B.
  
  11 ohms.
- C.
  
  15 ohms.
- D.
  
  8 ohms.
10.

(002) In a series-parallel circuit, the series current at I1 = 9 amps; in the two parallel branches, I2 = 5 amps; and the value of I3 is not listed. Use Ohm's law to find the value of I3 and IT.
- A.
  
  I3 = 5 amps and IT = 14 amps.
- B.
  
  I3 = 4 amps and IT = 9 amps.
- C.
  
  I3 = 4 amps and IT = 18 amps..
- D.
  
  Not enough information to solve.
11.

(002) In a series-parallel circuit, total voltage is 12 volts, the value of E1 in the series portions of the circuit is unknown. There are two parallel branches (E2 = 3 volts) and the value of E3 in the second parallel branch is unknown. Using Ohm's law, find the value of E1 and E3.
- A.
  
  E3 = 9 volts and E1 = 3 volts.
- B.
  
  E3 = 9 volts and E1 = 12 volts.
- C.
  
  E3 = 3 volts and E1 = 9 volts.
- D.
  
  E3 = 3 volts and E1 = 6 volts.
12.

(002) What is the difference between an open and a short?
- A.
  
  An open causes resistance to decrease; a short causes resistance to increase.
- B.
  
  No current flow in an open circuit; excessive current flow in a shorted component.
- C.
  
  Minimum voltage development across the open component; maximum voltage development across the shorted component.
- D.
  
  Excessive current flow in an open circuit; no current flow in a shorted component.
13.

(003) When voltage is induced into a conductor by a relative motion between the conductor and a magnetic field this principle is known as
- A.
  
  Magnetism.
- B.
  
  Reluctance.
- C.
  
  Direct current.
- D.
  
  Electromagnetic induction.
14.

(003) In an inductive circuit, what is meant by current lags voltage by 90 degrees?
- A.
  
  Current is maximum when voltage is zero; voltage is maximum when current is zero.
- B.
  
  Current is zero when voltage is zero; voltage is maximum when current is maximum.
- C.
  
  If current decreases, voltage aids the decrease.
- D.
  
  If current increases, voltage aids the increase.
15.

(004) What is the basic principle of operation for transformers?
- A.
  
  Mutual induction.
- B.
  
  Magnetic induction.
- C.
  
  Counterelectromotive force.
- D.
  
  Primary and secondary induction.
16.

(004) What transformer winding acts as a conductor and provides the path into which the voltage is induced?
- A.
  
  Field.
- B.
  
  Primary.
- C.
  
  Secondary.
- D.
  
  Stationary.
17.

(005) If the size of the plates of a capacitor is increased, how is capacitance affected?
- A.
  
  Capacitance increases.
- B.
  
  Capacitance decreases.
- C.
  
  Electrons are distorted and scattered.
- D.
  
  Electrostatic force between the plates decreases.
18.

(005) What statement best describes a capacitive circuit?
- A.
  
  Has the ability to conduct in all directions when gated or discharged.
- B.
  
  Has the ability to conduct in one direction and not the other.
- C.
  
  Applied voltage leads current by 90 degrees.
- D.
  
  Current leads applied voltage by 90 degrees.
19.

(005) In what type of circuit(s) does a capacitor oppose any change in voltage?
- A.
  
  Alternating current (AC) and direct current (DC)
- B.
  
  Pulsating DC.
- C.
  
  AC.
- D.
  
  Pure DC.
20.

(006) What statement best describes a diode?
- A.
  
  Is a three-terminal device.
- B.
  
  Has the ability to conduct in one direction and not the other.
- C.
  
  Is a five-terminal device.
- D.
  
  Has the ability to conduct in all directions when gated or discharged.
21.

(006) What are the minority carriers in P-type material?
- A.
  
  Neutrons.
- B.
  
  Holes.
- C.
  
  Electrons.
- D.
  
  Protons.
22.

(007) The area of a semiconductor where P-type material is joined to N-type material is known as
- A.
  
  Dielectric region.
- B.
  
  Depletion region.
- C.
  
  Depletion field.
- D.
  
  PN region.
23.

(007) A junction diode has how many PN junctions(s)?
- A.
  
  1.
- B.
  
  2.
- C.
  
  3.
- D.
  
  4.
24.

(007) If a negative potential is connected to the cathode and a positive potential is connected to the anode of a PN junction, the diode is
- A.
  
  Reverse biased.
- B.
  
  Turned on.
- C.
  
  Forward biased.
- D.
  
  Not allowing current to flow.
25.

(008) In a circuit using a bridge rectifier, how many diodes are forward biased during the first cycle of alternating current (AC)?
- A.
  
  4.
- B.
  
  3.
- C.
  
  2.
- D.
  
  1.

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