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Ch. 20-Part 2
Test Description: Electricity
Instructions: Answer all questions to get your test result.
1) As voltage _______________, more electrical potential energy is available to be transformed into other forms of energy.
A
stays the same
B
increases
C
increases and decreases
D
decreases
2) individual electrons move ___________ in an electric circuit constantly colliding moving electric charge from negative to positive terminals
A
quickly
B
slowly
C
no where
D
slowly than quickly than back to slowly
3) Batteries supply energy to an electric current by converting ______________energy to electric potential energy.
A
chemical
B
electrical
C
thermal
D
kinetic
4) Once _______________ are used up such as in a battery, electrons can no longer move through the circuits.
A
circuits
B
chemicals
C
conductors
D
insulators
5) the measure of how difficult it is for electrons to flow through a material
A
electric discharge
B
resistance
C
voltage
D
electric force
6) 'What are the units of current?
A
ions
B
ohms
C
volts
D
amps
7) What is the unit for resistance?
A
amperes
B
volts
C
ions
D
Ohms
8) _______________________ is one of the best electric conductors and creates least resistance to electron flow.
A
wood
B
copper
C
aluminum
D
glass
9) Electric charges will flow continuously only through a closed conducting loop called a __________________.
A
circuit
B
insulator
C
battery
D
conductor
10) The amount of electrical energy converted to thermal energy in a wire increases as the _______________ of the wire increases.
A
force
B
thickness
C
resistance
D
static charge
*select an answer for all questions
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