Which Of The Following Is True About Electricity And Magnetism

Question: Whether material is magnetic or not depends on which of the following?a. the material's weightb. the material's atomsc. the material's densityd. the material's mass

Answer: the material's atoms

Question: As electrons move, they makeAs electrons move, they makea. ferromagnetismb. electromagnetismc. aurorasd. magnetic fields

Answer: magnetic fields

Question: A compass needle responds to magnetic field, because the compass needle is aa. magnetb. transformerc. motord. generator

Answer: magnet

Question: What is created when a magnet moves through a coil of wire?a. ferromagnetb. an electric currentc. an electromagnetd. a solenoid

Answer: Electric current

Question: What can demagnetize a magnet?a. high temperaturesb. high altitudesc. low temperaturesd. low altitude

Answer: high temperatures

Question: A coil of wire with an electric current in it is called a(n)a. transformerb. solenoidc. electric motord. electric generator

Answer: Solenoid

Question: A coil of wire that has a soft iron core and that acts as a magnet when an electric current is in the coil is called a(n)a. ferromagnetb. permanent magnetc. electromagnetd. temporary magnet

Answer: electromagnet

Question: Increasing the number of loops per meter in the coils of a solenoid is one way toa. weaken the solenoid's magnetic fieldb. strengthen the solenoid's magnetic fieldc. increase the wire's electric currentd. decrease the wire's electric current

Answer: strengthen the solenoid's magnetic field

Question: What can you make visible by sprinkling iron filings around a magnet?a. the magnetic forcesb. the magnetic field linesc. the north and south polesd. the areas called domains

Answer: magnetic field lines

Question: Increasing the electric current in the wire is one way to.....a. the magnetic forcesb. the magnetic field linesc. the north and south polesd. the areas called domains

Answer: Strengthen a solenoids magnetic field

Question: material that can take on magnetic properties quickly; also loses them quickly

Answer: Temporary magnet

Question: long coil of wire used to create a magnetic field

Answer: Solenoid

Question: material that is difficult to magnetize; will maintain magnetism for a long period

Answer: Permanent magnet

Question: device that converts mechanical energy into electrical energy

Answer: Generator

Question: device that increases or decreases the voltage of alternating current

Answer: transformer

Question: set of lines that defines the motion of charged particles near a magnet

Answer: Magnetic field

Question: metal object that acts as a magnet when an electric current moves through it

Answer: Electromagnet

Question: metal object that acts as a magnet when an electric current moves through it

Answer: Mechanical energy

Question: movement of electrons through a material

Answer: Electric current

Question: device that converts electric energy into mechanical energy

Answer: Electric motor

Question: When an electric current flows through a wire:a gravitational field is created around the wire.a magnetic field is created around the wire.the wire becomes very cold.the wire begins to spin.

Answer: a magnetic field is created around the wire.

Question: Which of the following actions will decrease the strength of the magnetic field of an electromagnet?decreasing the current in the wireusing fewer loops of wire per meterall answer choices applyremoving the iron core

Answer: All answer choices apply

Question: The magnetic field of a solenoid can be increased byadding more loops per meterputting a rubber core inside the coilremoving the iron coredecreasing the current

Answer: Adding more loops per meter

Question: Which of the following is true about the relationship between electricity and magnetism?Magnetism is based on how gravity attracts electrical energy.Magnetism and electricity cannot be converted into one another.Electricity can be used to create a magnet.Electrical energy and magnetism cancel each other out.

Answer: Electricity can be used to create a magnet.

Question: Fischer has an iron nail, a metal wire, and a battery and connects them.Fischer moves a few iron fillings toward the set-up. What would MOST LIKELY happen to the iron filings? They will be attracted to the nail. They will be attracted to the battery. They will be repelled from the nail. They will be repelled from the battery.

Answer: They will be attracted to the nail

Question: A coil that has an iron core and that acts as a magnet when an electric current is in the coil SolenoidElectric motorGeneratorElectric motorElectromagnetTransformerGalvanometer

Answer: Electromagnet

Question: If you were to cut a magnet in half...you would have two smaller magnets, each with a north and south poleyou would have demagnetized ityou would have separated the north pole from the south polenothing would happen

Answer: you would have two smaller magnets, each with a north and South Pole

Question: Magnetic force is stronger the closer the magnets are brought together. TrueFalse

Answer: TRUE

Question: A temporary magnet can quickly become magnetized.TrueFalse

Answer: TRUE

Question: A coil of wire with an electric current in itSolenoidVoltmeter Electric motorElectromagnetismGeneratorTransformerElectromagnet

Answer: Solenoid

Question: What is an electric Generator

Answer: a device that converts mechanical energy into electrical energy

Question: How does an electric generator work

Answer: The electric current produced by a generator changes direction each time the coil makes a half turn. Because the electric current changes direction, it is an alternating current.

Question: How do you generate electrical energy

Answer: The energy that generators convert into electrical energy comes from different sources such as fossil fuels and nuclear energy.

Question: What is an electric motor

Answer: a device that changes electrical energy into mechanical energy

Question: What do all electric motor have

Answer: Armature

Question: What is an armature

Answer: a loop or coil of wire that can rotate

Question: What is a galvanometer?

Answer: Measures current

Question: What does a Galvanometer meter have

Answer: It has an electromagnet placed between the poles of a permanent magnet.

Question: Where are ammeters found

Answer: Galvometers

Question: Electricity is the flow of....

Answer: Electrons

Question: Which of these statements describes how an electric motor works?Electricity is used to move a turbine.Electricity creates a magnet that causes other parts of the motor to move.A permanent magnet is turned into an electromagnet using electricity.Moving turbines cause magnets to move, producing electricity.

Answer: Electricity creates a magnet that causes other parts of the motor to move.

Question: What kind of energy transformation takes place in a generator?mechanical to chemicalelectrical to mechanicalmechanical to electricalelectrical to chemical

Answer: Mechanical to electrical

Question: How can a magnet be used to produce an electric current?Wrap wire around the magnet.Hold the magnet next to a wire.Spin the magnet around inside a coil of wire.Connect a wire to each end of the magnet.

Answer: Spin the magnet around inside a coil of wire

Question: CAUSE: AN Electrical current enter a simple electric motorEffect:The simple electric motor converts the electrical current into mechanical energy.The simple electric motor converts the electrical current into chemical energy.The simple electric motor converts the electrical current into solar energy.The simple electric motor converts the electrical current into light energy.

Answer: The simple electric motor converts the electrical current into mechanical energy.

Question: What is a transformer?

Answer: a device that increases or decreases the voltage of an alternating current

Question: How does a transformer work?

Answer: The number of loops in the primary and secondary coils of a transformer determines whether it increases or decreases the voltage.

Question: What does a step-up transformer do?

Answer: Increases voltage and decreases current

Question: What does a step-down transformer do?

Answer: Decreases voltage and increas current

Question: A student attaches a meter to a wire coil. Next, the student spins a magnet inside the coil. As the magnet spins, the meter indicates...volumetemperatureconductivitycurrent

Answer: Current

Question: Long distance electrical transmission is best achieved if the voltage of electrical current is increased to thousands volts. What component in the electrical grid performs this functions?junction boxsubstationgeneratortransformer

Answer: Transformer