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WorksheetsElectricity and Magnetism Review
Total questions: 28
Worksheet time: 56mins
The force or push that causes electric charges to move is called ______ .
resistance
voltage difference
static electricity
current
Electric charges always flow from _____ areas to _____ areas.
positive; negative
negative; positive
neutral; negative
neutral; positive
A material through which electrons do NOT flow easily is a(n) ______.
insulator
conductor
fuse
circuit breaker
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.
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
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
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
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
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
Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 100 amps?
1.98 V
0.000198 V
5050 V
100.0198 V
This contains a piece of metal that melts if it gets too hot in order to open a circuit.
conductor
insulator
fuse
circuit breaker
The function of a generator is to change ______
chemical energy to electrical energy
electrical energy to chemical energy
mechanical energy to electrical energy
electrical energy to mechanical energy
This exerts a force that causes other electric charges to move.
electrical poles
electrical fields
insulators
conductors
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
What process is the method by which a neutral object obtains an electrical charge from a distance?
convection
conduction
radiation
induction
Which of the following objects would NOT be a good insulator of electric charge?
skin
wood
plastic
rubber
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 answers
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
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.
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
positive
What happens if you line the magnets up so that two of the same poles face each other? (ex. North Pole & North Pole)
They will attract
They will repel
This is an example of what type of circuit?
simple
series
parallel
