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- 1. Multiple Choice
The force or push that causes electric charges to move is called ______.
resistance
voltage difference
current
static electricity
- 2. Multiple Choice
Electric charges always flow from _____ areas to _____ areas.
positive, negative
negative, positive
positive, neutral
neutral, negative
- 3. Multiple Choice
. A material through which electrons do NOT flow easily is a(n) _____.
insulator
fuse
conductor
circuit breaker
- 4. Multiple Choice
Which of the following statements about electric charge is true?
Objects must be touching on another to exert electrical force.
Electrical forces act at a distance.
Air cannot conduct electricity; it is conducted only by solid materials.
Opposite electric charges always repel one another.
- 5. Multiple Choice
Mr. Robinson and his class are conducting an experiment. The class needs to choose a good insulator. Which of the following could be used as an insulator?
plastic plate
silver spoon
copper wire
gold necklace
- 6. Multiple Choice
Which of the following will increase the resistance of a wire?
using a thicker/wider wire
using a shorter wire
increasing the temperature of the wire
using silver instead of copper
- 7. Multiple Choice
What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms?
1.8 amps
45 amps
0.022 amps
8.8 amps
- 8. Multiple Choice
Which two areas of physical science are closely related to the development of electric motors and generators?
sound and light
electricity and sound
light and magnetism
electricity and magnetism
- 9. Multiple Choice
Which of the following will decrease the strength of the magnetic field around a wire?
increasing the current flowing through the wire
using less loops around the iron core
flipping the direction of the current flowing through the wire
using a larger iron core
- 10. Multiple Choice
Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 100 amps?
1.98 V
0.000198 V
5,050 V
100.0198 V
- 11. Multiple Choice
This contains a piece of metal that melts if it gets too hot in order to open a circuit.
conductor
insulator
fuse
circuit breaker
- 12. Multiple Choice
The function of a generator is to change ____.
chemical energy to electrical energy
electrical energy to chemical energy
electrical energy to mechanical energy
mechanical energy to electrical energy
- 13. Multiple Choice
This exerts a force that causes other electric charges to move.
electrical poles
electrical fields
insulators
conductors
- 14. Multiple Choice
Which circuit below contains the greatest voltage?
A circuit with a current of 20 amps and a resistance of 16 ohms
A circuit with a current of 10 amps and a resistance of 10 ohms
A circuit with a current of 25 amps and a resistance of 16 ohms
A circuit with a current of 20 amps and a resistance of 10 ohms
- 15. Multiple Choice
What process is the method by which a neutral object obtains an electrical charge from a distance?
convection
conduction
radiation
induction
- 16. Multiple Choice
Which of the following objects would NOT be a good insulator of electric charge?
skin
wood
plastic
rubber
- 17. Multiple Choice
The Law of Conservation of Charge states that _____.
charge can be created and destroyed but NOT transferred.
charge cannot be created and destroyed but it can be transferred.
charge cannot be created and destroyed and it cannot be transferred.
none of the above
- 18. Multiple Choice
Alexandra was preparing to go on a hike in the woods. She gathered the equipment she would need and placed it on the kitchen counter. By chance, she placed her compass near an electrical outlet. Although the compass was not moving, the compass needle turned because ______.
the electric current in the outlet produced a magnetic field
the compass could only be used outdoors
the kitchen counter was made of a magnetic substance
the kitchen had a microwave oven
- 19. Multiple Choice
In a closed circuit containing one resistor and a battery, if the voltage in the battery increases, the current going through the resistor increases. Why does this occur?
As the electrons are sped up, they bunch closer together.
As the electrons have more energy, they vibrate more rapidly.
As the electrons are pushed more by the battery, they move faster through the circuit.
As the distance around the circuit increases, the electrons take longer to travel around.
- 20. Multiple Choice
Laser printers work with the use of heat and positive and negative charges. The laser etches a negative charge on spots of the printer drum in the form of text or images. The plastic ink dust is attracted to the places on the drum with this negative charge. What is the charge of the plastic ink dots themselves?
electron
negative
neutral
postive
- 21. Match
Match the following Positively charged particles in an atom
Protons
Negatively charged particles in an atom
Electrons
A device that detects electric charge on an object
Neutrons
Particles in the atom that have no charge
Ferromegnetism
When non-magnetic materials become attracted to magnets
Electroscope
- 22. Match
Match the following Circuit that has more than one pathway for current to travel through
Electromagnets
A device that measures the voltage difference in a circuit
Voltmeter
Temporary magnet made by placing a piece of iron inside a current carrying coil of wire.
Series Circuit
Circuit that has only one pathway for current to travel through
Parallel Circuit
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