1. Energy that comes from the flow of electrons is called ________________.
a. electricity
b. magnetic fields
c. conductors
2. Materials that prevent or reduce electrical charges are called _________________.
a. conductors
b. insulators
c. electromagnet
3. Materials that allow electrical charges to flow through are called ______________.
a. electricity
b. insulators
c. conductors
4. The space around magnets where a magnetic force can be found is called ____________.
a. poles
b. insulators
c. magnetic fields
5. Insulated wire wrapped around a magnet containing an iron core, which produces a current that magnetizes the core is called ____________.
a. electromagnet
b. an insulator
c. a conductor
6. Two surfaces rubbed together or pulled apart that create a buildup of positive and negative charges is called ____________.
a. electricity
b. static electricity
c. magnetic reactors
7. Electricity can be created by which of the following?
a. turbine and solar energy
b. solar energy and wind power
c. both a and b
8. Rivers, lakes, and other water sources produce a form of electricity known as ___________.
a. mineral power
b. hydroelectric power
c. wind power
9. A flow of electricity through a conductor is called a(n)______________.
a. insulator
b. electric current
c. circuit
10. Which of the following is electric potential difference expressed in volts?
a. convection
b. radiation
c. voltage
11. The term ______ refers to the forces that work against the flow of electron currents in a conductor.
a. resistance
b. conductor
c. insulator
12. An electric current that flows through a closed path is called a ___________.
a. magnetic field
b. circuit
c. insulator
13. Which of the following is a device that changes mechanical energy to electrical energy?
a. conductor
b. circuit
c. electric generator
14. A flow of electric charge that frequently reverses its direction is called a(n) ___________.
a. magnetic field
b. transformer
c. alternating current
15. A device used to change electric energy from one circuit to another is called a(n)___________.
a. insulator
b. electric generator
c. transformer
16. Which of the following is a group of atoms that are aligned and are pointing in the same direction?
a. magnetic domain
b. magnetic cluster
c. magnetic alignment
17. The section at each end of a magnet where the magnetic field is the strongest is called a(n) __________.
a. magnetic pole
b. magnetic domain
c. magnetic force
18. Which of the following is a closed circuit where the current can divide into two or more paths?
a. circuit route
b. parallel circuit
c. circuit field