Unit 2 Test Flashcards
What is the highest point of the wave called
The crest
What is a series circuit?
A circuit that only has one path for the electricity to flow.
What is the center of an atom called?
The nucleus
What is the lowest point of the wave called?
The trough
Opposite poles…
Attract
What is the distance between the resting position and the crest or the resting position and the trough called?
Amplitude
Why are magnetic poles important for navigation?
A compass needle attracts to the Earth’s North Pole, so we can see North.
What is an insulator?
A material that does NOT transfer energy easily
Like poles…
Repel
What is the unit of measurements for resistance?
Ohms
What is an open circuit?`
A circuit that is not in a continuous path, that has an opening. This means that the electricity cannot flow.
How can you increase an electromagnet?
Adding more coils, Tightening the coils, increasing the voltage of the battery.
What are some examples of electromagnetic waves?
X-rays, gamma rays, radio waves
What is the unit of measurements for currents?
Amps
Why does rubbing a balloon on hair create static electricity?
The electrons transfer from one object to another, resulting in an imbalance of charges, causing static electricity.
If an atom has 10 electrons and 8 protons, what is the overall charge?
Negative
What is the charge of a proton?
positive
What is the charge of a neutron?
neutral
What is the unit of measurements for voltage?
Volts
What is static electricity?
Static electricity is when there is an imbalance of positive and negative charges.
Why is Earth like a magnet?
Earth has a North Pole and a South Pole.
If a negatively charged item is brought near a neutrally charged item, what will happen?
The electrons will go to the neutrally charged item, and since both items will be negatively charged, they will repel.
What are the two types of magnetic poles?
North Pole and South Pole
What are the 3 main parts of an atom?
Protons, neutrons and electrons
Why is it important to have resistance in a circuit?
So that there is not too much electrical energy, it could cause electrical fires.
What happens if you add more light bulbs to a series circuit?
The additional lightbulbs create more resistance, resulting in dimmer lights.
What type of circuit would you use to power a home lighting system?
A parallel circuit.
What is a conductor?
A material that transfers energy easily.
What is a closed circuit, and why is it necessary for electricity to flow?
A circuit with no open ends, it allows electricity to flow in a continuous path.
What is the charge of an electron?
negative
What is a parallel circuit?
A circuit that has more than one paths for the electricity to flow.
What is the distance between trough to trough or crest to crest called?
Wavelength
