physics unit review
What is static charge or static electricity?
Static electricity is the result of an imbalance between negative and positive charges in an object.
What charge do electrons have?
Electrons have a Negative charge.
What charge do protons have?
Protons have a positive charge.
What charge do neutrons have?
They have a neutral electric charge
How do you get a negative charge?
When an object has more negative electrons it becomes negatively charged.
How do you get a positive charge?
When an object has more positive electrons it becomes positively charged.
What is the nucleus? What is it made up of?
The nucleus is in the centre of the atom and is made up of tiny particles called protons and neutrons.
What is an insulator?
An insulator is a material that doesn't let electricity or heat flow through it very easily.
What is a conductor?
A conductor is a material that allows electricity or heat to flow through it easily.
What is the unit of charge?
The unit of charge is called the "coulomb."
What is the Van der Graff generator?
A Van de Graaff generator is like a magic machine that makes your hair stand up and can create sparks.
What is grounding?
Grounding is a way to safely get rid of extra electricity
What is a force?
A force is a push or a pull that makes things move or change their motion.
What is electric force?
Electric force is a push or pull that happens between things with electric charges.
What happens when two charges are brought together?
*If they have opposite charges, they will attract each other. It's like a magnet pulling two objects together.
*If they have the same charges, they will repel each other. It's like two magnets with the same ends pushing each other away.
When do two charges attract?
Two charges attract each other when they are different from each other.
What increases the electrical force?
Bring them closer together and
Increase the amount of charge
What is charging by induction?
charging by induction is a way to make an object become charged by influencing the charges in it without direct contact.
What is electrical potential difference?
Electrical potential difference is like a "push" that makes electric charges move.
What is another name for voltage?
Another name for voltage is "electric potential difference."
What is another name for batteries?
Another name for batteries is: "galvanic cell" or "voltaic cell."
What measures potential differences or voltage?
A device called a "voltmeter" measures potential differences or voltage.
What are electrochemical cells?
.They make electricity by using chemical reactions.
What is energy?
Energy is the "power" that makes things happen. Energy comes in different forms, like light, heat, and motion.
What is potential energy?
Potential energy is like "stored" energy. It's energy that something has because of its position or condition.
What device measures voltage?
A device called a "voltmeter" measures voltage.
What is an electrolyte?
An electrolyte is like a special liquid that helps electricity flow.
What is current?
current is the flow of electricity through a wire or a circuit.
What is the ampere?
The ampere is a unit that measures how much electric current is flowing in a wire or circuit.
What is the device used for measuring current?
A device used for measuring electric current is called an "ammeter."
What are examples of electric load?
Lightbulbs
Appliances
Electronics
Heaters and Air Conditioners
What are circuit diagrams?
They use symbols to show how electrical components, like wires, batteries, and switches, are connected in an electrical circuit.
What happens when you have an open switch?
When you have an open switch, it's like having a gap in the path for electricity.
What slows down the flow of electrons?
Things like resistance slow down the flow of electrons in a wire
What is the unit of measurement for electrical resistance?
The unit of measurement for electrical resistance is the ohm (symbol: Ω).
What is the formula for Ohms law?
V = I * R
What electrical components used within a circut can convert electrical energy into other forms of energy?
Resistors:
Light Bulbs:
Electric Motors:
Loudspeakers:
Solar Panels:
What is a series circuit?
A series circuit is like a single pathway for electricity.
What happens to the total resistance when you add a series circuit with a resistor?
When you add a resistor to a series circuit, the total resistance in the circuit increases
What is a parallel circuit?
A parallel circuit is like having multiple separate pathways for electricity.
What happens when you connect resistors in parallel?
When you connect resistors in parallel, it's like giving electricity more pathways to travel.
How many millamperes in one ampere?
There are 1,000 milliamperes (mA) in one ampere (A)
What happens if you increase the number of cells in a parallel circut?
If you increase the number of cells in a parallel circuit, it's like adding more power sources to the circuit.
What happens if you increase the number of cells in a series circut?
If you increase the number of cells in a series circuit, it's like stacking more batteries in a row.