Electricity and Electromagnetism Flashcards
Are Protons positively charged, negatively charged or Neutral?
Positive.
Are Electrons positively charged, negatively charged or Neutral?
Negative.
Are Neutrons positively charged, negatively charged or Neutral?
Neutral.
What happens if two charged objects are similar?
They repel.
What happens if the charged objects are opposite?
They attract.
True or False?
Negatively Charged objects have more electrons than protons?
True.
In a Electrostatic chart, the top has a __________ hold on Electrons and the bottom has a __________ on Electrons.
Negative (Weak)
Positive (Strong)
What is Ohm’s Law?
V= I x R
What is Potential Difference?
Voltage.
What is Current intensity measured in?
Amps.
What is Resistance measured in?
Ohms.
What is the function of a Power Source/Battery?
Power Supply.
What is the function of Wires?
Conduction.
What is the function of a Lightbulb/Motor?
Energy Transformation.
What is the function of a Switch?
Control.
What is the function of a Resistor?
Opposes the flow of electrical current.
What is the function of a Fuse?
Protection.
What is the function of an Ammeter?
Measures the current flowing through a circuit.
What is the function of a Voltmeter?
Measures the voltage flowing through the circuit.
How is an ammeter connected within a circuit?
It’s placed within the circuit.
How is a voltmeter connected in a circuit?
It’s placed outside of the circuit.
What is a difference between a series circuit and parallel circuit?
A series circuit only has one path, while a parallel has more than one.
If a switch is closed, what happens?
Electrons flow through the circuit.
If a switch is open, what happens?
The flow of electrons is interrupted, and electricity will not happen.
What is the formula for electrical power?
P= V x I
What is electrical power measured in?
Watts (W) or kilowatt (kW)
1000 watts= ___ kW
1.
What is the formula for Electrical Energy?
E= P x T
What is Electrical Energy measured in?
Joules (J) or kilowatt hour (kWh).
What is time measured in?
Seconds (s) or Hours (h).
Every Magnet has two Poles: _______ and ______.
North
South
Like Poles: ____
Repel.
Unlike Poles: ____
Attract.
What is the direction that a magnetic field always going to have?
North to South.
What is the first left hand rule?
If the wire is going from negative to positive, the direction of the compass will be up. If the wire is going from positive to negative, the direction of the compass will be down.
How do you increase the intensity of a magnetic field of a live wire?
Increase the current.
Use a better conductor.
How do you increase the intensity of a magnetic field of a solenoid?
Increase the current
Use a better conductor
Increase the number of loops
In a circuit, the power source features a big line and a small line.
What does the big line represent and what does the small line represent?
Big= Positive
Small= Negative
