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Definitions
Short Answer
Diagrams
Problem Solving
Critical Thinking
100
The continuous flow of electric charge
What is an electric current?
100
What is an electric current measured in?
Ampere
100
What is this symbol?
resistance
100
Calculate the resistance in a circuit if the current flowing is 12 A and the voltage difference is 480 V.
40 ohms
100
Which of the following will conduct electricity? Why? Gold or glass
Gold as it's a metal that allows electrons to flow.
200
The current in which charges reverse their direction.
What is an alternating current?
200
In which type of circuit does current have only one loop to flow through?
Series circuit
200
What type of circuit is the following? Why?
Series, the electric current has one path
200
What is the current in a circuit if the voltage difference is 15 V and resistance is 15 W?
1 ampere
200
Use Ohm's law to explain how two circuits could have the same current but different resistances.
If they have different voltages with the same ratio of the resistances ratio.
300
The opposition to the flow of charges in a material.
What is resistance?
300
Write the equations that calculate electric power and electric energy.
P = I xV E= P xt
300
Which line refers to a DC and which refers to an AC one? Why?
DC - blue one direction AC - red two directions
300
What is the electric current when a charge of 0.7 C flows in 0.06 seconds?
11.7 amperes
300
You plug in a string of holiday lights and notice that the entire string turns off when you remove one bulb. Explain why this happens.
The bulbs are connected in series.
400
The difference in electrical stored energy between two places in an electric field.
What is the potential difference?
400
Why do two lightbulbs connected in parallel shine more brightly than when they are connected in parallel?
Because the overall resistance is lower and the voltage is the same across each bulb.
400
What is this type of charging called?
induction
400
If the resistance is tripled in a circuit , what happens to the electric current?
it is reduced to one third of the original value
400
What does it indicate when the circuit breaker in the house opens?
This means that the current in the circuit is too high.
500
The rate at which electrical energy is converted to other forms of energy.
What is electric power?
500
How can two wires of the same material and same lengths have different resistances?
Different thickness or different temperature
500
Which bulb or bulbs will have a current in the schematic diagram shown on the right? Explain
A because the open switch won't let the current flow in B and C
500
Six lightbulbs are connected in series with a 9.0 volt battery.What is the voltage across each bulb?
9/ 6 = 1.5 V
500
Why is a battery always connected in a way that one wire goes to the positive terminal and the other to the negative?
Because current will only pass between two oppositely charged terminals.The negative terminal is the source of electrons and the positive one accepts electrons.