# 2A672 Edit Code 7 Quiz

90 Questions | Total Attempts: 218  Settings  2A672 edit code 7.

• 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.

• B.

• 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.

• C.

• 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.

• 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.

• B. Back to top