# 2A672 Edit Code 6 1-40

41 Questions | Total Attempts: 419  Settings  • 1.
What is the simplest form of matter?
• A.

Element

• B.

Mixture

• C.

Electrons

• D.

Compound

• 2.
In an atom what electrons contain the most energy?
• A.

The energy is shared equaly by all electrons

• B.

Orbiting electrons

• C.

Valence electrons

• D.

K shell electrons

• 3.
If there are eight electrons in the outer most shell of an atom then it is considered?
• A.

Complete

• B.

Unstable

• C.

Charged

• D.

Stable

• 4.
Atoms having more than four electrons, but less than eight are know as?
• A.

Insulators

• B.

Conductors

• C.

Stable atoms

• D.

Semiconductor

• 5.
The electrostatic fields around a positive ion move
• A.

Inward

• B.

Outward

• C.

Inward, then outward

• D.

Outward, then inward

• 6.
The force required to move free electrons through a conductor is known as?
• A.

Current

• B.

Voltage

• C.

Negative charge

• D.

Electrostatic force

• 7.
What are factors that 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

• 8.
What is the resistance in a circuit if the power rating is 40 watts and the total current is 2 amps?
• A.

40 ohms

• B.

20 ohms

• C.

10 ohms

• D.

0.5 ohms

• 9.
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.

15 ohms

• C.

11 ohms

• D.

8 ohms

• 10.
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 ohms 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.
In a series parallel circuit, total voltage is 12 volts, the value of E1 in the series portion of the circuit is unknown. there are two parallel branches  (E2=3 volts) and the value of E3 in the second parallel is unknown. using ohms law, find the value of E1 and E3
• A.

E3= 9 volts and E1= 12 volts

• B.

E3=9 volts and E1= 3 volts

• C.

E3= 3 volts and E1= 6 volts

• D.

E3=3 volts and E1= 9 volts

• 12.
What is the difference between an open and a short?
• A.

An open causes resistance to decrease; a short causes resistance to increase

• B.

Excessive current flow in an open circuit; no current flow in a shorted component

• C.

No current flow in an open circuit; excessive current flow in a shorted component

• D.

Minimum voltage development across the open component; maximum voltage development across the shorted component

• 13.
When voltage is induced by a relative motion between the conductor and a magnetic field this principle is know as?
• A.

Magnetism

• B.

Reluctance

• C.

Direct current

• D.

Electromagnetic induction

• 14.
In am inductive circuit what is meant by current lags voltage by 90 degrees?
• A.

Current is zero when voltage is zero; voltage is maximum when current is maximum

• B.

Current is maximum when voltage is zero; voltage is maximum when current is zero

• C.

If current decreases, voltage aids the decrease

• D.

If current increases voltage aids the increases

• 15.
What is the basic principle of operation for transformers?
• A.

Mutual induction

• B.

Magnetic induction

• C.

Counter electromotive force

• D.

Primary and secondary induction

• 16.
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.
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.
What 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

• 19.
In what type of circuit(s) does a capacitor oppose any change in voltage
• A.

AC and DC

• B.

Pulsating DC

• C.

Pure DC

• D.

AC

• 20.
What statement best describes a diode?
• A.

Is a five-terminal device

• B.

Is a three-terminal device

• 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

• 21.
What are the minority carriers in a p-type material?
• A.

Holes

• B.

Protons

• C.

Neutrons

• D.

Electrons

• 22.
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.
A junction diode has how many PN junctions?
• A.

1

• B.

2

• C.

3

• D.

4

• 24.
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.

Not allowing current to flow

• B.

Forward biased

• C.

Reverse biased

• D.

Turned on

• 25.
In a circuit using a bridge rectifier how many diodes a forward biased during the first cycle of alternation current (AC)
• A.

4

• B.

3

• C.

2

• D.

1

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