2A672 Edit Code 7

90 Questions | By Dinstaarhero | Updated: Mar 19, 2022 | Attempts: 1762

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2A672 edit code 7.

Questions and Answers

1.

In an atom, this electron contains the most energy.
- A.
  
  Stationary electrons
- B.
  
  Orbiting electrons
- C.
  
  Valence electrons
- D.
  
  K shell electrons
2.

When there are eight electrons in the outer most shell of an atom, it is considered
- A.
  
  Charged
- B.
  
  Unstable
- C.
  
  Complete
- D.
  
  Stable
3.

Atoms having more than four electrons, but less than eight are known as
- A.
  
  Insulators
- B.
  
  Conductors
- C.
  
  Stable atoms
- D.
  
  Semiconductors
4.

The electrostatic fields around a positive ion move
- A.
  
  Inward
- B.
  
  Outward
- C.
  
  Inward, then outward
- D.
  
  Outward, then inward
5.

These factors affect the resistance of a material
- A.
  
  Area, weight, and state of material
- B.
  
  Area, temperature, and type of material
- C.
  
  Temperature, weight, and state of material
- D.
  
  Temperature, type of material, and state of material
6.

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
7.

This is relative motion between a conductor and a magnetic field that causes voltage to be induced.
- A.
  
  Reluctance
- B.
  
  Direct current
- C.
  
  Magnetism
- D.
  
  Electromagnetic induction
8.

This is the basic principle of transformer operation.
- A.
  
  Mutual induction
- B.
  
  Magnetic induction
- C.
  
  Counter electromotive force
- D.
  
  Primary and secondary induction
9.

This transformer winding acts as a conductor and provides the path for the voltage to be induced into.
- A.
  
  Stationary
- B.
  
  Primary
- C.
  
  Secondary
- D.
  
  Field
10.

If the size of the plates of a capacitor is increased, how is capacitance affected?
- A.
  
  Capacitance increases
- B.
  
  Capacitance decreases
- C.
  
  Capacitance remains the same
- D.
  
  Capacitance increases only if the plate size doubles
11.

This statement best describes a capacitive circuit
- A.
  
  Current leads applied voltage by 90 degrees.
- B.
  
  Applied voltage leads current by 90 degrees
- C.
  
  Has the ability to conduct in one direction and not the other.
- D.
  
  Has the ability to conduct in all directions when gated or discharged.
12.

This statement best describes a diode
- A.
  
  It is a five-terminal device
- B.
  
  It is a three-terminal device
- C.
  
  It has the ability to conduct in one direction and not the other
- D.
  
  It has the ability to conduct in all directions when gated or discharged
13.

How many electrons does the valance band of an intrinsic semiconductor have?
- A.
  
  3
- B.
  
  4
- C.
  
  5
- D.
  
  6
14.

This is the area of a semiconductor where P-type material is joined to N-type material.
- A.
  
  Dielectric region
- B.
  
  Depletion region
- C.
  
  Depletion field
- D.
  
  PN region
15.

A bridge rectifier is installed in an alternating current (AC) circuit to
- A.
  
  Decrease direct current (DC) pulses
- B.
  
  Provide fullwave rectification
- C.
  
  Provide halfwave rectification
- D.
  
  Decrease ripple frequency
16.

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
17.

This is how a zener diode is connected in a solid state circuit to regulate voltage.
- A.
  
  In parallel to the load
- B.
  
  In series with the load
- C.
  
  In parallel to the resistor
- D.
  
  In series with the resistor
18.

This is how is a zener diode is connected in a circuit to protect the load
- A.
  
  In parallel to the resistor
- B.
  
  In series with the load
- C.
  
  In parallel to the load
- D.
  
  Forward biased
19.

A silicon-controlled rectifier (SCR) has this many layers
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
20.

In order to turn off a silicon-controlled rectifier (SCR), the current must drop below the
- A.
  
  Trigger current
- B.
  
  Holding current
- C.
  
  Variable current
- D.
  
  Breakdown current
21.

This is the major difference between a NPN and PNP transistor.
- A.
  
  A PNP transistor can only be used as a regulator
- B.
  
  An NPN transistor can only be used as a switch
- C.
  
  Direction of current flow
- D.
  
  Number of junctions
22.

If the arrow in a bipolar transistor is pointing away from the base, which type of transistor is it?
- A.
  
  N-type
- B.
  
  P-type
- C.
  
  NPN
- D.
  
  PNP
23.

This is the circuit in a bipolar transistor that carries 5 percent of the current flow
- A.
  
  Base circuit
- B.
  
  Load circuit
- C.
  
  Control circuit
- D.
  
  Emitter-collector circuit
24.

These are the three leads of a unijunction transistor (UJT).
- A.
  
  Anode, cathode, and gate
- B.
  
  Emitter, base 1, and base 2
- C.
  
  Emitter, collector, and base
- D.
  
  Common emitter, common collector, and common base
25.

This is the purpose of a transistor amplifier
- A.
  
  Controls current to the load.
- B.
  
  Controls voltage to the load
- C.
  
  Controls resistance to the load
- D.
  
  Acts as a spike protector for the load