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What causes magnetism?
Movement of electrons.
If three resistors in series are 10 Ohms, 12 Ohms, and 3 Ohms, what is the total resistance?
25 Ohms
What causes static electricity between a balloon and your hair?
Electrons move, different objects become positively or negatively charged.
If 15 electrons pass a point in 3 seconds, what is the current in Amps?
5 Amps
If an iPhone charger has a power of 15 Watts at 1.5 amps, what is the voltage required?
10 Volts
If a circuit has a voltage of 9V and a total resistance of 18 Ohms, what is the current?
0.5 Amps.
What is the difference between a motor and generator?
A generator transfers work into electricity. A motor transfers electricity into work.
What could you do to increase the magnetism of an electromagnet?
Increase number of coils, increase number of batteries.
What types of energy are used and produced when to cause a flashlight to light up?
Chemical of battery to electric to thermal and light energy.
Electric current in a wire produces a ___ field.
Magnetic
What is the SI unit for resistance?
Ohms (Ω)
An electric generator turns ___ energy into ___ energy.
Mechanical, electrical
What type of force is used in wireless charging?
Electromagnetic
