Calculating Charge Flow in Capacitor: 1.02V to 6.78V Battery Swap

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In summary, the problem involves calculating the additional charge that flows to the positive plate of an uncharged capacitor when the battery connected to it is changed from 1.02 V to 6.78 V. The approach suggested is to set up ratios and use the equation C = Q/V, where C is capacitance, Q is charge, and V is voltage. However, the attempted solution using this method is incorrect and further assistance is needed.
  • #1
BuBbLeS01
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Capacitors...Please HELP!

Homework Statement


An uncharged capacitor is connected to the terminals of a 1.02 V battery, and 1.69 μC flows to the positive plate. The 1.02 V battery is then disconnected and replaced with 6.78 V battery, with the positive and negative terminals connected in the same manner as before. How much additional charge flows to the positive plate?


Homework Equations





The Attempt at a Solution


I am not really sure how to start this problem without having the capacitance. Can someone help me get started..thanks!
 
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  • #2
Can I set these up as ratios?
 
  • #3
Capacitance is just charge/voltage. You could set up two ratios equal (capacitance isn't changing with additional voltage, but as voltage increases you must increase charge to hold the capacitance constant.
 
  • #4
So I could do...
1.69x10^-9 C/1.02 V = Q/6.78 V
Q = 1.12x10^-8 C
Then subtract them to get my answer being...
9.54x10^-9 C
 
  • #5
No that's not right...ahh what am doing wrong??
 

FAQ: Calculating Charge Flow in Capacitor: 1.02V to 6.78V Battery Swap

What is a capacitor?

A capacitor is an electronic component that is used to store and release electrical energy. It consists of two conductive plates separated by an insulating material, known as a dielectric.

How does a capacitor work?

A capacitor works by storing electric charge on its plates when connected to a power source. When the capacitor is disconnected from the power source, it releases the stored energy, which can be used to power devices or smooth out electrical signals.

What are the different types of capacitors?

There are many different types of capacitors, including ceramic, electrolytic, film, and tantalum capacitors. Each type has its own unique characteristics and is used for different purposes.

How do I choose the right capacitor for my project?

When choosing a capacitor, you should consider factors such as capacitance, voltage rating, and tolerance. It is also important to consider the type of capacitor that is best suited for your specific project.

Can a capacitor be dangerous?

Yes, capacitors can be dangerous if not handled properly. They can store a significant amount of electrical energy and can discharge it quickly, potentially causing harm. It is important to follow proper safety precautions when working with capacitors.

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