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Physics library
Course: Physics library > Unit 18
Lesson 4: Discovery of batteries- Zinc copper cell (reduction-oxidation)
- How to measure?
- Battery meter (galvanometer)
- How Many Turns?
- Electrolyte test (pure water vs. vinegar)
- Reverse electrodes (polarity)
- Electrolyte (strong acid test)
- Electrolyte (salt test)
- Electrode (distance test)
- Electrolyte (temperature test)
- Electrode (surface area test)
- Standard cell
- How much electrolyte does a single cell need?
- The battery and electromagnetism
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Electrode (distance test)
Does the distance between the copper and zinc electrodes matter? What happens to the deflection when we hold them close vs. far apart? Why is there a difference? Created by Brit Cruise.
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It is something like if the electrodes are closer, more current passes per unit time and so magnetic field is stronger?(15 votes)
wHo was aciting in this and where/(1 vote)
Bruit Cruise is the owner of the arms you see waving about the screen. :D
He never says where he is, although I'm going to assume somewhere in CA.(2 votes)
What is the liquid being used?(1 vote)
what happens if the electrodes touch?(1 vote)
nothing since their charges are both neutralised by the "metals" this would lead to no voltage differentiation so the copass would go back to what is true north(2 votes)
At0:52What is making them move closer and further? What is with the wire or water?(1 vote)- I'm going to say magnetic force does that. (I could be wrong...)(1 vote)
The closer the two electrodes are, the stronger the magnetic field is??(1 vote)
Yeah the stronger the electrodes are, the stronger the magnetic field induced by the current, so there is a greater angle of deflection on the compass(1 vote)
what happens if u add another cup ?(1 vote)- does it have to be a plastic cup or any type ?(1 vote)
- Any type. What matters is what is inside the cup(1 vote)
- copper is way more precious than zinc, correct?(1 vote)
- the farther apart they are the more resistance there is right?(1 vote)
0:52Video transcript
(footsteps in the background) (water dripping) (pen scratches on paper) (light thud of mechanism on table) (footsteps in background) (metallic clink) (pen scratches on paper) (metal scraping against inside of cup)