Electricity

Question 1

A.C Signals

Answer 1

Produced by Outlets
Alternates both directions

Question 2

D.C Signals

Answer 2

Produced by Batteries
Travels one directions

Question 3

Define Capacitance

Answer 3

The charge stored per unit voltage

Question 4

1 Farad
Is equivalent to:

Answer 4

1 coulomb per volt

Question 5

Define forward bias using p and n type junctions

Answer 5

P type connected to the positive
N type connected to the negative

Question 6

Define reverse bias with p and n type junctions

Answer 6

P type connected to the negative side
N type connected to the positive side

Question 7

Current flow only occurs is what bias

Answer 7

Forward bias

Question 8

Electrons move from n to p type creating…

Answer 8

Holes

Question 9

Charging graph:
Current and time on capacitatorp

Answer 9

Slowing Curve downwards

Question 10

Charging graphs:
Voltage against time

Answer 10

Slowing curve upwards

Question 11

Define open circuit

Answer 11

A circuit where no current flows

Question 12

Define e.m.f

Answer 12

The energy supplied to each coulomb of charge passing through the battery

Question 13

Define short circuit

Answer 13

When internal and load resistance are equivalent

Question 14

How to find the internal resistance from a graph

Answer 14

Plot voltage on y
Plot current on x
E.m.f is y intercept
r is gradient *-1

Question 15

Effect on t.p.d
When current increases

Answer 15

Lost volts increases
T.p.d decreases