Lesson 4 — Current, voltage and ressistance

Electricity — 5.2 Resistance
1 / 14
volgende
Slide 1: Tekstslide
PhysicsMiddelbare schoolvwoLeerjaar 3

In deze les zitten 14 slides, met tekstslides.

time-iconLesduur is: 45 min

Onderdelen in deze les

Electricity — 5.2 Resistance

Slide 1 - Tekstslide

This lesson
  • The planner
  • Discussing the homework
  • Voltage, current & resistance
  • Going over 5.2 Resistance


Slide 2 - Tekstslide

Slide 3 - Tekstslide

Discussing the homework

Slide 4 - Tekstslide

Exercise 2
Variable
Symbol
Unit
Symbol
voltage
I
Ohm

Slide 5 - Tekstslide

Exercise 2
Variable
Symbol
Unit
Symbol
voltage
U
Volt
v
Current
I
Ampere
A
Resistance
R
Ohm
Ω

Slide 6 - Tekstslide

Excercise 4
a) The current changed
b) 
c) The wire heated up
d)

R=IU

Slide 7 - Tekstslide

Excercise 4
a) The voltage remains constant, but the current changed over time. This can only be the case when the resistance of the filament changes.
b) 
c) The wire inside of the incandescent bulb 
heated up which caused the resistance to increase.
d) 

R=IU

Slide 8 - Tekstslide

Current

Voltage

Resistance

Slide 9 - Tekstslide

R=IU
Resistance=currentvoltage

Slide 10 - Tekstslide

Current — The amount of charge that flows through a given point in a circuit per unit of time.

Voltage — The difference in electrical potential energy between two points in a circuit.

Resistance — The measure in which a circuit resists the flow of electrical current.

Slide 11 - Tekstslide

Slide 12 - Tekstslide

Going over 5.2
Resistance, voltage & current
  • Understand the concepts theoretically
  • Understand what they are in an electric circuit

Ohmic resistance
Resistance and temperature
Variable resistors


Slide 13 - Tekstslide

Homework
Read 5,2 Plus section
> 5.2 Exercise 10, 11
< 5.2 Exercise 10

Slide 14 - Tekstslide