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Atoms and one misc.
Electrical Calculations 1
Electrical Calculations 2
Circuits
Misc.
100
The part of an atom with a positive charge
What is a proton.
100
The symbol for voltage in equations.
What is V?
100
A computer monitor draws 1.2 A at a voltage of 120 V. What is the power rating of the monitor? (Hint: use the equation for Power: P= V x I)
What is 144 W Use the Power equation P = V x I P = 120 x 1.2
100
The 2 basic types of circuits.
What are series and parallel?
100
2 things the size of an electric force depends on.
What are the amount of each charge and the distance between the charges?
200
The part of an atom with a neutral charge.
What is a neutron?
200
The symbol for Resistance in equations.
What is R?
200
A light bulb draws a 0.5 A current at a voltage of 120 V. What is the power rating of the light bulb? (Hint: use that power equation again)
What is 60 W? P = V x I P = 120 x 0.5
200
The three things that make up a circuit.
What are an energy source, wires, and a load?
200
Broken wires or water can cause this.
What is a short circuit?
300
The part of an atom that is not in the core
What is an electron?
300
The symbol for current in equations.
What is I?
300
Use the equation for Ohm's law to calculate the voltage if the current is .5 A and the resistance is 5 ohms.
What is 2.5 V? Ohm's Law: V = I x R V = .5 x 5
300
The purpose of a switch in a circuit.
To control the circuit; turn it on or off.
300
This has a thin strip of metal that melts if the current is too high.
What is a fuse?
400
Are protons attracted to or repelled by electrons? Explain why when you give your answer.
attracted; the charges are opposite, and opposites attract
400
The symbol for Electric Power in equations.
What is P?
400
The resistance of an object is 4 ohms (symbol is omega). If the current in the object is 9 A, what voltage must be used?
What is V = I x R V = 9 A x 4 ohms V = 36 volts
400
The purpose of a circuit breaker.
What is a switch that automatically opens if the current is too high.
400
Because it senses heat, this can be used to test the temperature of a car battery.
What is a thermocouple?
500
Method when charges in an uncharged metal object are rearranged without direct contact with a charged object.
What is induction?
500
The unit for Electric Power.
What is Watt?
500
How much electrical energy does a 40 W light bulb use if it is left on for 12 hours? (hint: the equation uses kW, not W, so you need to first convert)
What is 0.48 kWh? E = P x t E = 0.040 kW x 12 h E = 0.48 kWh
500
GFCI stands for this.
What is a ground fault circuit interrupter?
500
air, wood, glass
What are insulators?