Cette leçon contient 14 diapositives, avec diapositives de texte.
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Ohm's law
Slide 1 - Diapositive
Before you do the questions:
You are setup in a group through zoom.
One of you shares your screen with the presentation on it.
One of you writes down the answers you come to in a word document (if this isn't possible, aks mr. Brands for help)
Now you're ready, start the questions
Slide 2 - Diapositive
1) What are the three quantities in Ohm's law?
Slide 3 - Diapositive
2) What is current? And its unit?
Slide 4 - Diapositive
3) What is potential difference? and its unit?
Slide 5 - Diapositive
4) What is resistance? and its unit?
Slide 6 - Diapositive
5) What is the relationship between current, potential difference and current?
Slide 7 - Diapositive
6) In a circuit a lightbulb gets changed for another lightbulb with a larger resistance. The potential difference over the circuit stays the same. What happens to the current in the circuit? Explain it in your own words and using ohm’s law.
Slide 8 - Diapositive
7) In a circuit a resistor gets replaced. With the new resistor the current has increased. What can you say about the resistance of the new resistor compared to the old one. Explain.
Slide 9 - Diapositive
8) What is the correct way of rewriting Ohm's law to use it for calculating current?
Slide 10 - Diapositive
9) What is the correct way of rewriting Ohm's law to use it for calculating potential difference?
Slide 11 - Diapositive
10) What current flows through the bulb of a 3.00-V flashlight when its resistance is 3.60 Ω?
Slide 12 - Diapositive
11) Calculate the resistance of a pocket calculator that has a 1.35 V battery and through which 0.200 mA flows.
Slide 13 - Diapositive
12
a) Find the voltage drop in an extension cord having a 0.0600−Ω resistance and through which 5.00 A is flowing.
b) A cheaper cord utilizes thinner wire and has a resistance of 0.300Ω . What is the voltage drop in it when 5.00 A flows?
