AQA A Level Physics 3.7.4.3 Energy stored by a capacitor

Match:

• Voltage

• Work

• Charge

When a capacitor is ​ charging , one plate is connected to the ​ (a)   terminal of the power supply, and the other plate is connected to the negative ​ (b)   . The negative terminal is a ​ (c)   of electrons, and the positive terminal has a ​ (d)   of electrons. Charge builds up on the plates.

• positive
• terminal
• source
• deficit
• lack
• opposite
• producer
• surplus
• lot
• negative

As a capacitor charges is gets progressively ​ (a)   to add more ​ (b)   to the plates. This is because the plates are accumulating ​ (c)   charges, and these ​ (d)   one another.

• negative
• harder
• charge
• like
• repel
• positive
• opposite
• attract
• easier
• current

As a capacitor charges, the ​ (a)   across the plates ​ (b)   ​ ​ (c)   with the charge stored. It is a ​ (d)   relationship.

• current
• voltage
• increases
• decreases
• directly proportionally
• exponentially
• indirectly
• non-linear
• linear
• resistance

What happens when a small section of a metal plate gains a negative charge?

• The charges spread themselves out across the surface

• The charges spread themselves throughout the volume

• The charges remain fixed in position

• The charges move from one side to another and back again

Why can charges move freely across a metal plate?

• The plate is a conductor

• The plate is an insulator

• They are induced to move

• They are attracted by the positive plate

The area beneath a voltage-charge graph is:

• Work

• Current

• Resistance

• Capacitance

• Permittivity

Work done to store charge in a capacitor:

Work done to store charge in a capacitor:

Work done to store charge in a capacitor: