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WorksheetsElectricity & Magnetism
Total questions: 20
Worksheet time: 39mins
When would an electromagnet stop working?
When the electric current is interrupted
When it gets sunlight
When it cools below 45 degrees
After 24 hours
Which is an example of electrical energy transforming to another kind?
a heater feeling warm
a lightbulb lighting up
a motor making noise
all of these
Magnetism refers to
Only an attractive force between magnetic materials
An attractive or repulsive force between magnetic materials
Only a repulsive force between magnetic materials
Any force between magnetic and nonmagnetic materials
The drawing of the circuit shows energy being changed from
electrical changing to light
sound changing to mechanical
light changing to sound
electrical changing to mechanical
Betty is using a microwave to cook her lunch. What evidence does Betty have that the microwave changes electrical energy into heat?
Her lunch gets hot
Her lunch changes color
Her lunch becomes cold
Her lunch tastes bad
When electricity runs through a light bulb, what other type of energy is produced?
mechanical
light
chemical
sound
Where in the picture would you find evidence of energy transfer?
the wires at position Y
the battery at position Z
the fan at position X
Which of the following is a way energy transfer can be shown in a circuit?
a motor begins to move
a fan begins to move
a light bulb lights up
all of these
To power a fan using a simple electric motor, the fan's shaft and blades are attached to
the motor's stationary magnet
the motor's rotating wire coil
the battery powering the electromagnet
the gas tank fueling the motor
When electricity runs through an electric stove, what other type of energy is produced?
mechanical
sound
heat
chemical
2 bulbs are connected to a battery in a series circuit. Both bulbs are lit. A few minutes later, one of the bulbs burns out. What will happen to the other bulb?
The other bulb will glow brighter
The other bulb will no longer be lit.
The other bulb will remain lit at the same brightness
The other bulb will remain lit but not glow as brightly
Which of these is required to make a circuit?
2 batteries
static electricity
a closed loop
a lightbulb
Will this circuit allow electricity flow?
No; the battery in the circuit is not charged.
Yes; the wire connected to the battery is electrically charged
No; electrical currents need a complete loop of wires for the electricity to flow
Yes; the lightbulb will get energy from the battery
Irene is working on a series circuit for her science class. The circuit is made of a light bulb, battery, switch, and connecting wires. When Irene flips the switch, the light bulb lights up. What did the switch do for the circuit?
the switch provided light energy to the bulb
the switch produced electricity for the circuit
the switch completed the circuit
the switch had no effect on the circuit
Objects that stop the flow of electricity are good insulators. Which would be the best insulator for a metal wire?
water
copper wire
aluminum pipes
plastic tubing
Lindsey created a magnetic field using the setup shown. What could Lindsey pick up using this mechanism?
glass shards
pieces of plastic
iron filings
paper scraps
Generators
convert nuclear energy to mechanical energy
convert mechanical energy to electrical energy
convert mechanical energy to primary sources of energy
convert electrical energy to mechanical energy
George holds a magnet above a pile of paperclips. The paperclips move toward the magnet and stick to it before the magnet actually touches them. A magnet is surrounded by a _______ which applies a push or pull to an object without actually touching it.
magnetic field
generator
electric current
simple machine
How is a motor used in the generation of electricity?
Motors are never used to generate electricity
Motors build up tremendous amounts of heat, which can be transformed directly to electrical energy in a transformer.
Motors turn rotors that rotate coils of wire over a magnetic field which creates an electric current in the wire.
Motors can be substituted for electric power.
Objects that conduct electricity can easily carry an electrical charge. Which of the following best conducts electricity?
cotton string
plastic tubing
copper wire
rubber sheets
