A 30 A current is used for the heating coils of a toaster oven. If the resistance of the coils is 6 Ω, what is the voltage?
180 V
100
If an atom has more protons than electrons, it will have a __________ charge.
Positive
200
Material through which charges flow easily.
Conductor
200
The electric field lines of a positive charge go outward.
True.
200
Current is measured in...
Amps (A)
200
In a circuit, there is a 5.0 A current in the bulb. The voltage across the bulb is 20.0 V. What is the bulb’s resistance?
4 Ω
200
Direction of electric field lines around an isolated negative charge
Inward
300
The substance in a battery that conducts an electric current.
Electrolyte
300
A circuit must be parallel in order for it to conduct electricity.
False. A circuit must be complete in order for it to conduct electricity.
300
When representing current in a equation, the letter is...
I
300
A DVD player operates with 25 volts and uses 1,000 watts of power. How much current does the DVD player use?
40 A
300
True or False?
The relationship between power, current, and voltage is known as Ohm's Law.
False. Ohm's law is the relationship between resistance, current, and voltage.
400
The region around a charged object.
Electric field
400
Rubber is an example of a conductor.
False. Rubber is an insulator.
400
The unit of measure for electric power is...
Watts (W)
400
A hair straightner uses 1100 watts of power. The current flowing through it is 11 A. At what voltage does it operate?
100 V
400
When using a ____________ circuit, the number of bulbs does not affect the brightness of each bulb.
Parallel
500
A buildup of charges that is not moving or changing.
Static electricity
500
Induction is when electrons transfer through direct contact.
False. That is called conduction. Induction is when electrons transfer through the electric field lines.
500
The symbol for resistance is
Ω
500
You have a large flashlight that takes 3 D batteries. Each battery has 1.5 volts. If the current in the flashlight is 0.5 amps, what is the resistance of the light bulb?