Capacitors Flashcards
1
Q
What is meant by the capacitance of a capacitor?
A
The amount of charge that can be stored per volt
2
Q
What piece of equipment should you use to make a capacitor charge at a constant rate?
A
Variable resistor
3
Q
What is meant by permittivity?
A
How difficult is is to form an electric field in that substance
4
Q
What is meant by polar molecules being aligned anti-parallel?
A
When there is a charge on the plates, the positive ends of the molecules point towards the negative plate and vice versa
5
Q
What is the time constant?
A
-RC
-and the time taken for a capacitor to reduce to 37% of its initial value
-or time taken to charge to 67% of its final value
