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illuminati23
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If two parallel plates are facing one another and one of them are moved without opening the switch, what's the difference with moving the plates after opening the switch?
willem2 said:Sorry, You'll have to be more detailed than that.
When the switch is closed then V is the value of the power supply. So if you then increase d you put some energy back in the power supply. Increasing d means lowering the value of the capacitor. Since Q=C*V then Q will decrease. Also since E=V/d it means that E decreases. So your text reads: only V is constant, and Q and E are not constant. I think your book is a bit confusing (but correct).illuminati23 said:So my textbook says that if the distance between the parallel plates are increased from d to d' without opening the switch first(so that means that electric current is flowing), then only V is constant and Q, E is not constant. But if d is increased to d' after opening the switch(stopping the current), then Q and E is constant.
illuminati23 said:If two parallel plates are facing one another and one of them are moved without opening the switch, what's the difference with moving the plates after opening the switch?
crx said:-dielectric constant will decrease, capacitance will decrease, voltage between the plates will increase, and some of the charges will move back to the power supply. The energy to move the electrons back to the source will come from the work of the force that is used to depart the plates.
Born2bwire said:Dielectric constant is a material property, it would not change here unless one were to change the dielectric between the plates.
Parallel capacitors are two or more capacitors connected side by side with each other, sharing the same voltage source. They are also known as parallel plate capacitors.
Parallel capacitors have the same voltage across each capacitor, while series capacitors have the same charge across each capacitor. Additionally, in parallel capacitors, the total capacitance is equal to the sum of individual capacitances, while in series capacitors, the total capacitance is less than the capacitance of each individual capacitor.
The formula for calculating the total capacitance of parallel capacitors is: Ctotal = C1 + C2 + C3 + ..., where C1, C2, C3, etc. are the individual capacitances of each capacitor.
The total capacitance increases when more capacitors are added in parallel. This is because the plates of the capacitors are connected side by side, increasing the effective area of the plates and therefore increasing the total capacitance.
Parallel capacitors are used in various electronic devices such as computers, televisions, and radios. They are also commonly used in power factor correction circuits, where they help improve the efficiency of electrical systems by reducing the amount of reactive power drawn from the power source.