A positive ion is formed when

0%

0%

0%

0% A. A proton is added to a neutral atomB. A neutron is removed from a neutral atomC. An electron is removed from a neutral atomD. An electron is added to a neutral atom

The number of protons in an atomic nucleus determines the

0%

0%

0% A. Atomic weightB. Atomic numberC. Isotope

The smallest part of a compound that retains the characteristics of that compound

0%

0%

0%

0% A. AtomB. MoleculeC. Covalent BondD. Cell

The unit of electrical charge

0%

0%

0%

0% A. CoulombB. AmpereC. WattD. Farad

Electrons are attracted to

0%

0%

0% A. Negatively charged objectsB. Other electronsC. Positively charged objects

An electrostatic field is strongest

0%

0% A. Close to a charged objectB. Far away from a charged object

What symbol is used in formulas to represent electric charge?

0%

0%

0%

0% A. QB. EC. ID. R

What type of quantity is measured in Ampere’s?

0%

0%

0%

0% A. VoltageB. ForceC. CurrentD. Resistance

Electric _____ describes how quickly charge is moving through a circuit

0%

0%

0%

0% A. VoltageB. CurrentC. ResistanceD. Field

Every circuit consists of what three main parts?

0%

0%

0%

0% A. Transistors, diodes, and capacitorsB. Rheostats, MOSFET’s, and voltmetersC. Voltage source, load, and conductorsD. Static charge, microchip, and clock

The load in a circuit is where electrical _______ is converted into a different form such as light,

heat,sound, or motion.

0%

0%

0%

0% A. EnergyB. ChargeC. ResistanceD. Current

The SI units of energy are ______.

0%

0%

0%

0% A. WattsB. OhmsC. JoulesD. Volts

An Ampere is equivalent to one

0%

0%

0%

0% A. Joule/secondB. Coulomb/VoltC. Newton/meter2

D. Coulomb/second

Copper wires are often used as the ______ in a circuit.

0%

0%

0%

0% A. LoadB. Source of VoltageC. InsulatorsD. Conductors

_______ are materials that permit the electrons to flow easily.

0%

0%

0%

0% A. ConductorsB. InsulatorsC. DielectricsD. Plastics

______describes how much the flow of electrons is opposed.

0%

0%

0%

0% A. VoltageB. CurrentC. ResistanceD. Capacitance

The SI units of resistance are _____.

0%

0%

0%

0% A. OhmsB. AmperesC. VoltsD. Newtons

A _____ like copper has a very _____ resistance.

0%

0%

0%

0% A. Conductor, largeB. Insulator, smallC. Conductor, smallD. Insulator, large

Electrons flow around the circuit from the ____ end of a battery to the ___ .

0%

0%

0%

0% A. Negative, PositiveB. Positive, NegativeC. Neutral, NegativeD. Positive, Neutral

The movement of charge in a circuit is often described by the ______ current which flows from the positive

terminal of a battery to the negative.

0%

0%

0%

0% A. ConventionalB. UnorthodoxC. IconoclasticD. Anti-electron

When multiple electrical components are connected in _____ the current flows along a single path.

0%

0%

0%

0% A. ParallelB. SeriesC. PerpendicularD. Tandem

The dependence of electric current to the voltage and resistance of a circuit is

described by ______ Law

0%

0%

0%

0% A. Coulomb’sB. Ohm’sC. Faraday’sD. Lenz’s

The book describes ______ as the electrical “pressure” that pushes current through a circuit.

0%

0%

0%

0% A. ResistanceB. CapacitanceC. InductanceD. Voltage

What voltage is needed to produce a current of 2 A through a resistance of 6 Ohms?

0%

0%

0%

0% A. 12 VB. 24 VC. 0.33 VD. 8 V

When a load of 4 Ohms is connected to a potential difference of 12 V ______ of

current flows in the circuit.

0%

0%

0%

0% A. 48 AmperesB. 16 AmperesC. 3 AmperesD. 0.3 Amperes

How many volts does 8 kV represent?

0%

0%

0%

0% A. 0.008 VB. 80 VC. 8000 VD. 8,000,000 V

6x10-6 Coulombs is equivalent to

0%

0%

0%

0% A. 6 mCB. 6 MCC. 6 nCD. 6 mC

The invisible lines of force surrounding a charged object are called the:

0%

0%

0%

0% A. Electron ForceB. Electrostatic FieldC. Voltage linesD. Magnetic Field

Which part of a circuit provides the electrical energy?

0%

0%

0% A. Voltage sourceB. LoadC. Conductors

A 5kW resistance connected to a 100 V source will produce how much current?

0%

0%

0%

0% A. 20 AB. 0.05 AC. 20 mAD. 2 A

The two poles of a permanent magnet are ____ and ______.

0%

0%

0%

0% A. Positive, NegativeB. Black, WhiteC. North, SouthD. Loud, Quiet

Unlike poles ____ each other.

0%

0%

0%

0% A. AttractB. RepelC. ConsumeD. Dislike

The symbol for magnetic flux density is

0%

0%

0%

0% A. BB. EC. AD.

The symbol for magnetic flux is ___.

25%

25%

25%

25% A. B B. E C. A D.

A unit equal to the number of magnetic field lines per square centimeter.

0%

0%

0%

0% A. Webers/square meterB. TeslasC. GaussD. Farad

What physicist discovered that electric currents create magnetic fields?

0%

0%

0%

0% A. FaradayB. OerstedC. VoltaD. Tesla

What physicist discovered that electric currents create magnetic fields?

0%0%0%0%0%0%0%0%

What physicist discovered that electric currents create magnetic fields?

0%0%0%0%0%0%0%0%0%0%00

The magnetic field lines created by the electric current through a straight wire:

0%

0%

0%

0% A. Radiate outwardB. Radiate inwardC. Make circles around the wire.D. Make octagons around the wire.

A current carrying conductor coiled around a cylinder is called a(n) ______.

0%

0%

100%

0% A. CapacitorB. SolenoidC. InductorD. Toroid

The unit of measure for magnetomotive force is the ____.

0%

0%

0%

0% A. FluxB. GilbertC. GaussD. Tesla

An electromagnet is a solenoid with _____.

0%

0%

0%

0% A. A copper coreB. A plastic coreC. A creamy chocolate centerD. An iron core

Discovered that electric currents create magnetic fields.

0%

0%

0%

100% A. OerstedB. FaradayC. LenzD. Volta

Discovered that magnetic fields could induce an electric current

25%

25%

25%

25% A. Oersted B. Faraday C. Lenz D. Volta

Converts mechanical energy to electrical energy

0%

94%

6%

0% A. MotorB. TransformerC. GeneratorD. Battery

A transformer works

0%

0%

94%

6% A. With either AC or DC electricityB. Only with AC electricityC. Only with DC electricityD. Only with decepticons

The purpose of a transformer’s iron core is to

6%

81%

6%

6% A. Conduct electric current from the primary coil to the secondary coil.

B. Absorb heat generated by the coils so the transformer does not burn up.

C. Transfer the magnetic flux created by the primary coil to the secondary coil.

D. Cancel out the magnetic field created by the primary coil

The input side of a transformer is called the

0%

0%

6%

94% A. PrimaryB. SecondaryC. TertiaryD. Core

The voltage induced at the secondary coil of a transformer is an example of

0%

0%

100%

0% A. Self inductionB. Mutual inductionC. PizeoelectricityD. Chemical Action

A step-up transformer

0%

12%

76%

12% A. Increases both the voltage and the currentB. Increases the voltage but decreases the

currentC. Decreases the voltage but increases the

currentD. Decreases both the voltage and the

current

Transformer cores are laminated to reduce

6%

88%

6%

0% A. Copper lossesB. Hysteresis lossesC. Eddy current lossesD. Ravens losses

Copper losses in a transformer are also called

6%

0%

0%

94% A. I squared R lossesB. Impedance lossesC. Eddy lossesD. Hysteresis losses

The total opposition to the flow of current in a circuit is called

12%

88%

0%

0% A. ResistanceB. ReactanceC. ImpedanceD. CEMF

Energy lost due to molecular friction when the domains of the iron core flip polarity.

6%

0%

0%

94% A. Hysteresis lossesB. Copper lossesC. Iron lossesD. I squared R losses

The efficiency of a transformer is equal to

47%

7%

13%

33% A. The power out at the secondary coil divided by the power into the primary coil.

B. The fraction of the input power that is wasted due to copper, eddy current, or hysteresis losses.

C. More than 100% if the transformer is properly maintained.

D. The voltage at the secondary divided by the voltage at the primary.

Nsecondary/Nprimary =

63%

6%

6%

13%

13%

0% A. Vprimary/Vsecondary

B. Iprmary/Isecondary

C. Vsecondary/Vprimary

D. Isecondary/Iprimary

E. Either A or DF. Either B or C

A step down transformer

25%

25%

25%

25% A. Increases both the voltage and the current

B. Increases the voltage but decreases the current

C. Decreases the voltage but increases the current

D. Decreases both the voltage and the current

Step-up transformers at the power plant are used so that

6%

0%

81%

13% A. The electrical energy gets multiplied before being transmitted to homes.

B. Less current is carried by transmission lines which reduces I squared R losses.

C. DC electricity can be converted to AC electricity

D. AC electricity can be converted to DC electricity.

For a three-phase distribution system the multiple sets of windings are said to be_____ if they are in series

with each other.

0%

20%

47%

33% A. Delta connectedB. Wye connectedC. Delta-Wye connectedD. Wye-Naught connection

For a three-phase distribution system the multiple sets of windings are said to be_____ if

they are in parallel with each other.

25%

25%

25%

25% A. Delta connected B. Wye connected C. Delta-Wye connected D. Wye-Naught connection

A connection made somewhere in the middle of a transformer winding.

41%

24%

6%

29% A. TapB. SpoutC. SplitterD. Junction

One purpose of a transformer is to electrically isolate one part of a circuit from another

71%

29% A. TrueB. False

A transformer steps 120 volts down to 6 volts. A 30 ohm resistor is connected to the load side.

What current will occur in the primary?

25%

25%

44%

6% A. 180 AB. 0.20 AC. 4.0 AD. 0.01 A

A transformer can be used to create an electrical separation between two parts of a circuit. This is

known as ____

25%

25%

25%

25% A. InsulationB. InsolationC. IsolationD. Consolation

Induced emf in a circuit is always in a direction that opposes the change of flux that creates it.

25%

25%

25%

25% A. Kepler’s LawB. Rowland’s LawC. Newton’s LawD. Lenz’s Law

In order to create the magnetic field lines shown, the electrons in the blue wire must be flowing

25%

25%

25%

25%× × × × × × ×⊙ ⊙ ⊙ ⊙ ⊙ ⊙ ⊙

A. To the leftB. To the rightC. Up and DownD. None of the above (magnetic fields can’t be

created by moving electrons)

The symbol for magnetic flux density (aka magnetic field) is

25%

25%

25%

25% A. B. C. AD. B

A locked rotor occurs when

25%

25%

25%

25% A. The motor operator forgets her keysB. A mechanical load prevents it from spinningC. Rapunzel twirls like a dervishD. A softball pitcher gets a disjointed shoulder.

According to Lenz’s Law a changing magnetic flux does what?

25%

25%

25%

25% A. Induces a voltageB. Reduces the oxidant at the cathodeC. Produces a Higg’s BosonD. Transduces a piezoelectric

A motor converts

25%

25%

25%

25% A. Mechanical energy to electrical energyB. Kinetic energy to thermal energyC. Electrical energy to mechanical energyD. Chemical energy to electrical energy

Efficiency is

25%

25%

25%

25% A. The amount of work doneB. Ratio of output power to input powerC. Ratio of input power to output powerD. Ratio of secondary windings to primary

windings

The role of the electrolyte in a battery cell is to

25%

25%

25%

25% A. Change the charge of electrons from negative to positive so they can carry the conventional current.

B. Just like in Gatorade, it helps the battery recharge after being drained of energy.

C. Facilitate the reactions at the anode and cathode while conducting electric charge and completing the circuit.

D. Make sure the electrons don’t get too heavy.

Metals that attract to either pole of a magnet are called.

25%

25%

25%

25% A. FerromagnetsB. CupromagnetsC. AuromagnetsD. Stannomagnets

Examples of ferromagnets include

25%

25%

25%

25% A. Iron, Nickel, and CoboltB. Copper, Aluminum, and TinC. Silver, Magnesium, and ChromiumD. Iridium, Platinum, Zirconium

Field windings

25%

25%

25%

25% A. Can replace permanent magnets in a generator or motor

B. Can make a generator or motor strongerC. Both A & BD. None of the above

A fuel cell is similar to a battery in that it:

25%

25%

25%

25% A. Converts chemical energy to electrical energyB. Contains its own “fuel”C. Is inexpensive and used to power small toysD. Has a tiny generator spinning inside it.

A fuel cell is different than a battery in that:

25%

25%

25%

25% A. It’s “fuel” is continuously replenished from an external reservoir.

B. It produces a voltage that moves charge around a circuit.

C. It does not have an anode or cathodeD. It is a living organism with its own unique

genetic code.

The “exhaust” produced by a fuel cell is

25%

25%

25%

25% A. Pure waterB. Pure OxygenC. Pure HydrogenD. Pure Carbon Dioxide

Converts mechanical energy into electrical energy

25%

25%

25%

25% A. ThermocoupleB. PhotovoltaicC. ServoD. Generator

Energy loss due to the magnetization of domains flipping back and forth.

25%

25%

25%

25% A. Hysteresis LossesB. Eddy LossesC. I squared R lossesD. Hair Losses

Ability to produce electrical energy in a conductor without actually touching it.

25%

25%

25%

25% A. ReactionB. InductionC. DeductionD. Transduction

A device that converts energy from one form into another is called a

25%

25%

25%

25% A. TransmogrifierB. Flip flopperC. TransactorD. Transducer

An ampere turn is

25%

25%

25%

25% A. The positive terminal of a batteryB. How the capacity of batteries is ratedC. A measure of magneto-motive force (ability

to create magnetic field lines)D. A measure of electro-motive force (ability to

move charge through a circuit)

An anode is

25%

25%

25%

25%A. The terminal of an electric device where

conventional current enters (or equivalently where electrons exit)

B. The terminal of an electric device where conventional current departs (or equivalently where electrons enter)

C. Something that is opposed to lyric poetry.D. Defined in a consistent fashion by all reliable

sources.

The revolving part in a DC motor.

25%

25%

25%

25% A. BrushB. ArmatureC. Field WindingsD. Stator