Khan Academy
Khan Academy: Standard Cell
Watch as we test out a cell that holds the metals at a constant distance in this Khan video. We add it to salt water and then check the deflection. Can this be used as a standard unit? [1:08]
Khan Academy
Khan Academy: Reverse Electrodes (Polarity)
What happens to the deflection when we attach the penny and zinc in the opposite direction? Watch this video to find out. [1:22]
Khan Academy
Khan Academy: How Much Electrolyte Does a Single Cell Need?
This demonstration shows that when we pull a cell out of the electrolyte it still causes a deflection, which increases when pressure is applied. How could this lead to more efficient batteries? [0:39]
Khan Academy
Khan Academy: Challenge: Design a More Powerful Battery
A video challenging students to design a more powerful battery to light a blue LED. [0:30]
Khan Academy
Khan Academy: Challenge Solution
See the solution in this video how to get a four-cell battery generates 2 volts to generate 3 volts to light the blue LED. [0:36]
Khan Academy
Khan Academy: 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? Watch this visual demonstration to answer these questions. [1:05]
Khan Academy
Khan Academy: Electrolyte Test (Pure Water vs. Vinegar)
We attach our galvanometer to a piece of copper and zinc. Then we submerge the metals in pure water and vinegar. What is the difference? Watch this visual demonstration to answer this question. [1:22]
Khan Academy
Khan Academy: Electrolyte (Strong Acid Test)
This visual demonstration shows an experiment with a strong acid as an electrolyte and observing the change in deflection compared to weak acid (vinegar). [0:43]
Khan Academy
Khan Academy: Electrolyte (Temperature Test)
Watch as we experiment with hot vs. cold vinegar as our electrolyte. Does the deflection in our galvanometer depend on temperature? [1:36]
Khan Academy
Khan Academy: Electrode (Surface Area Test)
What's the difference between one piece of metal and three pieces of metal in our cell. Does deflection change? Watch this visual demonstration to answer these questions. [1:07]
Khan Academy
Khan Academy: The Battery and Electromagnetism
The video lesson is from Khan Academy's physics library. The discovery of the battery, along with its connection to electromagnetism, are discussed.
Khan Academy
Khan Academy: Electrolyte (Salt Test)
What happens to the deflection when we add salt to an electrolyte? Watch this visual demonstration to answer this question.
Next Vista for Learning
Next Vista for Learning: Powering Up Electricity
A video showing the construction of an electrical circuit. Understand the components that are needed to make electricity flow as LED light is powered. [1:30]
Next Vista for Learning
Next Vista for Learning: How Electricity Works
A video demonstration showing how to construct a series circuit with batteries, a light bulb, and wire. [1:18]
Mocomi & Anibrain Digital Technologies
Mocomi: How Do Batteries Work?
A video illustrates the basic function of a battery to allow us the convenience to run small electronics and appliances without an electric cord plugged into a wall. [2:15]
Khan Academy
Khan Academy: Battery Meter (Galvanometer)
Simple device which we can use to measure our homemade batteries. You can test it with any household battery first. What does this deflection represent? What forces are involved? [0:49]