EWIT lesson 1-4 review

what is electrical energy

• The energy associated with movement of electric charge (electrons)

• The energy stored as liquid in batteries

• The sum of all the internal Kinetic energy in a system

• The energy associated with direct sun light that travels through open space

What are potential factors that increase the flow of electricity?

• Add a 15 ohm resistor

• Decrease the diameter of the wire

• The increase of batteries in a series.

• The increase of batteries in parallel

What is an electromagnet

• An insulator that becomes magnetic when an electric current passes through a wire coiled around it.

• A conductor that becomes magnetic when an electric current passes through a wire coiled around it.

• A conductive material that has electrons scattered in all different directions

• An insulated material that has electrons scattered in all different directions

What are potential factors that increase the strength of electromagnet?

• Decrease # of coils

• Increase # of coils

• increase the # of batteries

• Decrease number of batteries

3 types of thermal energy transfer

• radiation, Conduction

  Contraption

• radiation, Insulation contraption

• radiation, Insulation convection.

• radiation, conduction, convection.

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why are some light bulbs more energy efficient than others?

• They are able to transfer electrical energy into just light energy

• They are able to transform electrical energy into just light energy

• They are able to transform electrical energy mostly into thermal energy

• They are able to transfer electrical energy mostly into thermal energy

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what is the relationship between kinetic energy and thermal energy.

• kinetic energy: the sum of all the kinetic energy in a system

  thermal energy: energy of motion

• kinetic energy: energy of motion thermal energy: the sum of all the kinetic energy in a system

• As kinetic energy increases, thermal energy decreases

• As kinetic energy increases, thermal energy increases

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what is electromagnet:

• Magnets that are created through the process of protons passing through a current over a conductive material

• An insulated metal core made into a magnet by the passage of electric current through a coil surrounding ith

• a conductive metal core made into a magnet by the passage of electric current through a coil surrounding it

• Magnets that are created through the process of protons passing through a current over an insulator

what an object that limits radiation

• glass

• foil

• Styrofoam

• plastic

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what's an object that limits conduction

• styrofoam

• foil

• aluminum

• glass

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