ELECTRICITY (not including static electricity ill get to that later)

Question 1

What is a current?

Answer 1

Current is the orderly flow of negative charges carried by electrons.
Electrons go from an area that is more negative to an area that is more positive

Question 2

What is static electricity?
What is dynamic electricity?

Answer 2

Static - all the things related to electrical charges at rest
Dynamic - all the things related to electrical charges in motion

Question 3

What is a direct current?
What is an alternating current?

Answer 3

Direct - an electric current where the electrons are continuously moving in the same direction
Alternating- an electric current where the same electrons move back and forth in an irregular pattern

Question 4

What is current intensity?
What letter is it represented by?
What is it measured in?
How do you calculate it?

Answer 4

• the number of charges that flow past a given point in an electrical circuit every second
• I
• Ampere (A)
• I= q
  —
  Δt

Question 5

What is an electrical circuit?

Answer 5

a network in which electrical charges flow continuously in a loop

Question 6

What are the components needed to make a circuit? (6)
explain em

Answer 6

Power supply:
any component that can generate an electric current in a circuit

Conduction:
transmit electric current from one part of a circuit to another

Control:
any component that can either turn on, turn off or redirect a current

Insulation:
component that prevents an electric current from flowing

Transformation:
any component that changes the electricity into another form of energy

Protection:
any component that can automatically cut current flow in the event of a power surge

Question 7

what is a resistor?
What is it represented by?
What is it measured by?
how to calculate it?

Answer 7

• anything that changes electrical energy into heat, light, sound and/or motion.
  Acts like a dam that slows down the current.
• R
• Electrical resistance
• 1Ω = 1Volt
  ———
  1Amp

Question 8

What do you need for a simple circuit?

Answer 8

Resistor, power source and a switch

Question 9

What is potential difference?
What is it represented by?
What is it measured in?
How to calculate?

Answer 9

• The amount of energy transferred between two points in an electrical circuit
• V
• Volts
• V = E
  —-
  q

Question 10

What is Ohm’s Law?

Answer 10

For a given resistance, the potential difference in an electrical circuit is directly proportional to the current intensity