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Basic Electricity
Electric Circuit
Conductors & Insulators
Magnets
Electro-magnets
100
Which of the following will produce light? A. metal attracting a magnet B. ice melting in water C. sound coming from a speaker D. electricity heating a wire
What is electricity heating a wire.
100
Which best describes a parallel electrical circuit? A. a circuit in which electricity can take several paths B. a circuit in which only two objects can be powered C. a circuit in which electricity is stopped from flowing D. a circuit in which there are two different switches
What is a circuit in which electricity can take several paths?
100
Which best explains the purpose of metal inside an electric power cord? A. It acts as a switch. B. It conducts current. C. It produces electricity. D. It heats the power cord.
It conducts current.
100
Which conducts heat best? A. iron B. cotton C. ceramic D. plastic
Iron because the material lets heat move through it easily.
100
Which statement is true? A. Copper is the best insulator for electricity. B. Electric currents make magnetic fields. C. Two magnets produce electricity when they repel each other. D. Copper wire turns off the magnetic field between two magnets.
Electric currents make magnetic fields.
200
Which of the following will produce light? A. metal attracting a magnet B. ice melting in water C. sound coming from a speaker D. electricity heating a wire
What are magnetic fields?
200
Why does a bulb light turn on when one closes the switch in a circuit? A. because closing the switch hooks up the battery B. because closing the switch completes the circuit C. because closing the switch produces electricity D. because closing the switch magnetizes the circuit
Does because closing the switch completes the circuit?
200
Which statement best describes a conductor? A. a material through which thermal energy cannot move B. a material through which thermal energy moves slowly C. a material through which thermal energy creates electricity D. a material through which thermal energy moves easily
What is a material through which thermal energy moves easily?
200
Which of the following has the greatest effect on the force between two magnets? A. air pressure in the room B. distance between the magnets C. temperature of the magnets D. humidity in the air
The distance between the magnets
200
Which statement is true? A. When an electric current travels through a wire, the wire becomes a magnet. B. When an electric current passes through a magnetic field, the magnetic field exerts a force on the current. C. When a magnet is held near an electric current, it loses its magnetic properties. D. When a magnet is placed near a wire conducting an electric current, the electric current will leave the wire and enter the magnet.
When an electric current passes through a magnetic field, the magnetic field exerts a force on the current.
300
Which of the following converts electrical energy into sound? A. piano B. drum C. doorbell D. lamp
What is a doorbell?
300
Which of the following is necessary to construct a circuit? A. wire B. magnet C. light bulb D. resistor
What is a wire?
300
Which statement best describes an insulator? A. An insulator causes electricity to flow more slowly. B. An insulator causes electricity to flow more quickly. C. An insulator does not allow electrons to flow easily. D. An insulator allows electrons to flow easily.
An insulator does not allow electrons to flow easily.
300
Which of the following has the greatest effect on the force between two magnets? A. the amount of time the magnets are near each other B. the color difference between the magnets C. the amount of light shining on the magnets D. the position of the magnets' poles
The position of the magnets' poles
300
How does an electromagnet work in an electric motor? A. Electricity creates magnetic fields that turn a rotor. B. Magnets create electricity by rubbing against each other. C. The motor powers the battery that produces electricity. D. Batteries produce electricity by being attracted to the magnets.
Electricity creates magnetic fields that turn a rotor.
400
Which of the following will produce heat? A. sound B. thermometer C. electricity D. gravity
What is electricity?
400
Which best describes the electricity in a series circuit? A. It has no resistance. B. It can power one object only. C. It flows around one path only. D. It requires multiple power sources.
It flows around one path only.
400
Which of the following is the best conductor of electricity? A. string B. copper C. wood D. glass
What is copper?
400
What are the two poles?
North and South
400
Which statement is true? A. Motion is required for magnetism to produce electricity. B. Water is required for magnetism to produce electricity. C. Friction is required for electricity to produce magnetism. D. Iron is required for electricity to produce magnetism.
Motion is required for magnetism to produce electricity.
500
Which results when electricity flows through a wire? A. heat B. water C. atoms D. molecules
What is heat?
500
What will happen if a resistor is added to a simple circuit containing one light bulb? A. The bulb will dim. B. The bulb will burn out. C. The bulb will flash on and off. D. The bulb will become brighter.
The bulb will dim.
500
Which of the following best explains the purpose of sewing cotton inside a coat? A. Cotton reflects light off of the coat. B. Cotton keeps thermal energy from escaping. C. Cotton soaks up moisture from the air. D. Cotton helps keep skin from getting sunburned.
Cotton keeps thermal energy from escaping.
500
Which statement is true? A. A bar magnet's field is strongest near the center of the magnet. B. A magnet's north pole will be attracted to another magnet's south pole. C. Magnetic fields have no effect on electrical currents. D. Magnets need light or heat in order to attract other magnets.
A magnet's north pole will be attracted to another magnet's south pole.
500
Which statement is true? A. In an electromagnet, the magnetic field flows alongside the electric current. B. In an electromagnet, the magnetic field flows within the electric current. C. In an electromagnet, the magnetic field forms circles around the electric current. D. In an electromagnet, the magnetic field zigzags around the electric current.
In an electromagnet, the magnetic field zigzags around the electric current.