Chapter 21
Key Terms
Chapter 21
Chapter 21
Equations
100
This states that current is equal to the potential difference divided by the resistance.
What is Ohm's law
100
This material allows electrons to flow through it easily.
What is insulator.
100
A series circuit only allows ______ route for the current.
What is one.
100
The rate a which an electrical devise converts energy from one form to another is called______.
What is Electrical power.
100
The reading on an electric meter was 4215 kWh, and one month later it was 7851 kWh. How much electrical energy was used during the one - month period?
What is 7851 kWh - 4215 kWh = 3636 kWh
200
List three conductors.....
What is metals; copper, silver
200
This devise can be used to detect the presence of static electric charge.
What is electroscope.
200
The build up of electric charge in one place is called this.
What is static electricity.
200
A large discharge of static electricity is what.....
What is lightning.
200
What is the size of the current that flows through a 120 W light bulb if it is connected to a 100 V source?
What is I = P/V 120/100 = 1.2A
300
List three Nonconductors......
What is plastic, wood, rubber, glass
300
A source of a constant electric current is_______.
What is dry cell.
300
A circuit that has two or more separate paths for electrons to follow is a(n)................
What is parallel circuit.
300
Potential energy of an electron ______ as it moves through a circuit.
What is varies.
300
The current flowing through a light bulb is 0.95 A and the potential difference across the light bulb is 160 V. How much resistance does the light bulb have?
What is R = V/I 160V/ .95A = 168.42 ohms
400
This type of material does not allow electrons to flow through it easily.
What is insulator.
400
This device is designed to open an overloaded circuit and prevent over heating.
What is circuit breaker.
400
Kilowatt-hours is used to measure what.......
What is electrical energy.
400
What equation is the correct relationship among power, current, and voltage.
What is P = I x V
400
Calculate the potential difference across a 50 ῼ resistor if a 0.5 A current is flowing through it.
What is V = I(AMPERES) X R(OHMS) 50ῼ X .5A = 25 VOLTS
500
This is the unit in which you measure current.
What is volt.
500
Ohms is the measurement unit used to measure this.
What is resistance.
500
The difference in potential energy per unit charge between two electrodes is measured in____________.
What is volts.
500
What is the correct equation to calculate electrical energy
What is E = P x t
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