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Worksheets4.4 Mastery Check
Total questions: 15
Worksheet time: 8mins
What is a magnet?
A material that conducts electricity
A material that reflects light
A material that gives off an external magnetic field
A material that absorbs sound
What happens to magnetic domains in magnetic elements?
They are not always aligned
They are forced to align
They do not form a magnetic field
They emit light
What is the result of non-aligned magnetic domains in nonmagnetic elements?
Strong magnetism
No apparent magnetism
High conductivity
Bright luminescence
What is the primary cause of magnetization in ferromagnetism?
Alignment of atomic poles.
Increase in temperature.
Chemical reaction.
Change in pressure.
Which of the following is a characteristic of ferromagnetic materials?
They can become magnetized.
They are always non-conductive.
They are always liquid at room temperature.
They are transparent.
What happens when the switch is open in an electromagnet circuit?
Current flows and the nail is magnetic
No current flows and the nail is not magnetic
The nail becomes permanently magnetic
The battery is disconnected
What is the primary difference between an electromagnet and a permanent magnet?
Electromagnets are always magnetic
Permanent magnets require electricity
Electromagnets require electricity to be magnetic
Permanent magnets can be turned off
What is the relationship between the strength of the current and the magnetic field strength in an electromagnet?
Directly proportional
Inversely proportional
No relationship
Exponentially proportional
How can the strength of an electromagnet be increased? Select all that apply.
Increase the number of wire loops
Increase the current
Use a thinner wire
Reduce the voltage
What happens to the magnetic field if the current in an electromagnet is turned off?
It becomes stronger.
It remains the same.
It disappears.
It reverses direction.
What is the function of an electric motor?
Convert electrical energy into mechanical energy
Convert mechanical energy into electrical energy
Store electrical energy
Store mechanical energy
What is the function of a generator?
Convert electrical energy into mechanical energy
Convert mechanical energy into electrical energy
Store electrical energy
Store mechanical energy
What type of energy conversion occurs in a generator?
Electrical to mechanical
Mechanical to electrical
Chemical to electrical
Electrical to chemical
In which device does the conversion of energy involve an electromagnet?
Electric Motor
Generator
Both A and B
Neither A nor B
Where can the strongest magnetic field be found on a magnet?
