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# PH 223 29:4-7

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## Richard Datwyler

on 8 November 2016

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#### Transcript of PH 223 29:4-7

What is the magnitude of the charge on each electrode.
What is the capacitance
Two 3.0 cm diameter aluminum electrodes are spaced .50 mm apart. The electrodes are connected to a 100 V battery
you need a 50 microfarad capacitor, but don't have one. Yet you have many 30 microfarad capacitors.
how could you connect them to make a 50 microfarad capacitor?

To what potential should you charge a 1.0 microfarad capacitor to store 1.0 J of energy?
two 5.0 cm diameter metal disks separated by a .50 mm thick piece of Pyrex glass (k=4.7) are charged to a potential difference of 1000V. What are the surface charge density on the
disk
glass

"I'm still struggling with understanding how electric potential connects with electric field and other principles we have been taught previously."
"why is the surface charge density larger at rounded points? If the charge equally distributes across the surface woulndn't it be equal at all points? "
"If two spheres of different radii are connected by a wire, is the charge greater in the larger sphere?"
"I think I just need some help with dielectrics."
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