6.1 Capacitors

Question 1

what is a capacitor?

Answer 1

Component that stores charge on two separated metallic plates

Question 2

define capacitance.

Answer 2

Charge stored per unit potential difference

Question 3

What does the area underneath the graph represent in a voltage against charge graph.

Answer 3

Work done
-hence formula is 1/2QV

Question 4

Give some examples of the use of capacitors.

Answer 4

-Camera flashes
-Touch screen

Question 5

Draw each of the graphs for charging of a capacitor where x is current, potential difference and charge

Answer 5

-V/T graph is curved starting from zero
-Q/T graph is also curved starting from zero
-I/T graph is cured starting from maximum

Question 6

Draw each of the graphs for discharging of a capacitor where x is current, potential difference and charge

Answer 6

-All graphs start from maximum and curve downwards

Question 7

List the factors which affect capacitance.

Answer 7

-Permittivity
-Area
-Distance