An object is charged negatively if it has gained _________________.
Electricity and Magnetism Test Review

Quiz
•
Science
•
8th Grade
•
Medium
Chad Butler
Used 10+ times
FREE Resource
38 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
electrons
protons
neutrons
positrons
Answer explanation
An object is charged negatively when it gains electrons. Electrons are negatively charged particles, so their addition results in a net negative charge. Protons and positrons are positively charged, while neutrons are neutral.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A ________________ is a device that converts mechanical energy to electrical energy.
generator
motor
transformer
battery
Answer explanation
A generator is a device that converts mechanical energy into electrical energy, making it the correct choice. In contrast, a motor converts electrical energy to mechanical energy, a transformer changes voltage levels, and a battery stores energy.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The ________________ hand rule is used to determine the direction of a magnetic field around a current-carrying wire.
right
left
upward
downward
Answer explanation
The right hand rule helps visualize the direction of the magnetic field around a current-carrying wire. When you point your thumb in the direction of the current, your fingers curl in the direction of the magnetic field, confirming 'right' is correct.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Locations in space where a charged object experiences a force are called ________________ fields.
electric
magnetic
gravitational
nuclear
Answer explanation
Locations in space where a charged object experiences a force are called electric fields. Electric fields are created by charged objects and influence other charges within the field.
5.
OPEN ENDED QUESTION
3 mins • 1 pt
Transformers are used to convert ________________ to ________________.
Evaluate responses using AI:
OFF
Answer explanation
Transformers are used to convert alternating current (AC) to different voltage levels, either stepping it up or stepping it down, depending on the application.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The flow of electric current in a wire is caused by a difference in ________________ energy.
potential
kinetic
thermal
chemical
Answer explanation
The flow of electric current in a wire is driven by a difference in potential energy. This potential difference, or voltage, causes electrons to move, creating an electric current.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Earth's magnetic field protects us from ________________.
Earth's magnetic field protects us from solar and cosmic radiation.
harmful UV rays from the sun.
the greenhouse effect.
global warming.
Answer explanation
Earth's magnetic field acts as a shield, protecting us from solar and cosmic radiation, which can be harmful to life. The other options, such as UV rays and global warming, are not directly mitigated by the magnetic field.
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