Generators
Motors
Series Circuits
Parallel Circuits
100
Copy and complete the following sentence:
A ____________ magnetic field induces an ____________ ____________.
A changing magnetic field induces an electric current.
100
What is this called?
An electromagnet
100
Select the correct phrase:
The current through R1 is greater than / less than / equal to the current through R2.
equal to
100
Select the correct phrase:
The current through R1 is greater than / less than / equal to the current through R2.
greater than
200
Select the correct words. You must select all the correct words to receive points!
You can increase an induced current by using a stronger / weaker magnet, moving the magnet faster / slower, or using more / less coils.
stronger
faster
more
200
Select the correct words. You must select all the correct words to receive points!
You can increase the strength of this electromagnet by using more / less voltage or using more / less coils.
more
more
200
What is the total resistance of this circuit? Show your calculations and include units in your answer.
RT = 200 + 400 + 150 = 750 Ω
200
What is the voltage drop across the 5Ω resistor?
20 V
300
Copy and complete the following sentence:
A generator transforms _______________ energy into _______________ energy.
A generator transforms kinetic (motion/movement) energy into electrical energy.
300
Copy and complete the following sentence:
A motor transforms _______________ energy into _______________ energy.
A motor transforms electrical energy into kinetic (motion/movement) energy.
300
Show your calculations and include units in your answer.
V = IR
V = (2)(100)
V = 200 V
300
Select the correct phrase:
The value (number) shown by Ammeter AT is greater than / less than / equal to the value shown by Ammeter A3.
greater than
(AT is the total current of all three branches)
400
This is a generator:
Describe how this generator produces electricity. Use the words: spin, magnet, magnetic field, coil of wire, induced current.
When the coil of wire spins in the magnet, it experiences a changing magnetic field. This induces a current in the wire.
400
Here is an electromagnet:
Explain why the nail is magnet using the following words: battery, current, coil of wire, magnetic field.
The battery pushes current through the coil of wire. This current produces a magnetic field, and the iron nail focuses the magnetic field to be a magnet.
400
Show your calculations and include units in your answer.
V = IR
12 = I(600)
12/600 = I
0.02 A = I
400
What value (number) will A3 show?
V = IR
20 = I(10)
20/10 = I
2 A = I
500
Show your calculations and include units in your answer.
V = IR
20 = I (2+9+5)
20 = I (16)
20/16 = I
1.25 A = I
500
What value (number) will AT show?
IT = I1 + I2 + I3
IT = 20/5 + 20/6 + 20/10
IT = 9.33 A