Parts of a Circuit
A student is constructing an electrical circuit. Which of the following can provide energy for the circuit? A.electric generator B. Wire C. light bulb D.buzzer
Answer: A. an electric generator
What are the units of Power?
Watts
In a parallel circuit electricity has ______ path(s) to follow.
multiple
Some students test a plastic spoon as a connector in an electrical circuit. Electricity does not flow in the circuit. Plastic is most likely... A. a load. B. an energy source C. a conductor D. an insulator
D. an insulator
What is the role of a load in an electric circuit?
The load is the part of the circuit that receives electrical energy and can be turned on.
Describe an equation that can be used to find the power use in a circuit
P = E/t, P = VI or P = (V^2)/R
If one load stops working in a series circuit what happens to any other loads in the circuit?
They also stop working.
Which material will best conduct electricity? A. plastic B. rubber C. wood D. silver
D. silver
What direction does conventional current flow
Positive to negative
Which unit measures the amount of Joules of energy present per Coulomb of charge?
Voltage
Do you think Christmas Lights are an example of a series circuit or a parallel circuit? why do you think that?
They are an example of a series circuit because if one of the bulbs burns out the entire strand will not light up.
What are the three ways you can express the Ohms Law Formula
V = IR
R = V/I
I = V/R
Explain why there is a difference between conventional current and electron flow
Conventional current was defined as flowing from the positive terminal to the negative terminal, however the charge in a circuit is carries by electrons, which flow from the negative terminal to the positive one
A circuit has a 12V power supply and a current of 2A flowing through it. If the circuit is powered for 1 minute, how much energy flows through it?
1440J
What is the total resistance of three resistors in parallel with individual resistances of 10, 20 and 30 ohms.
5.45 ohms
In Ohms Law, what is proportional? What does this mean?
Current and Voltage
If you increase one, the other increases in proportion
Draw the following circuit:
Two battery cells in series with two resistors followed by a light bulb. A switch is located before the first resistor. A second lightbulb is wired in parallel with the second resistor, and a voltmeter is measuring the potential difference across both resistors.
Teacher to determine correct answer
A circuit with resistance of 1350 Ohms has a voltage of 12V put through it. How much power does it consume?
0.107W
A circuit consists of two parallel pathways, each with two resistors. The first pathway has resistors of 10 and 30 ohms, the second pathway has resistors of 50 and 100 ohms. What is the total resistance?
40.83 Ohms
A circuit has two resistors of values 10 ohms and 40 ohms in series. The voltage in the circuit is 20V, what is the voltage and current going through each resistor.
Resistor 1 - 10 Ohms: 4V, 0.4A
Resistor 2 - 40 Ohms: 16V, 0.4A