Section 6 (Electricity) - Current And Potential Difference

Question 1

Definition of Current:

Answer 1

Is the rate of flow of charge since charge is carried through the wires by electrons.

Question 2

Ammeter are ONLY attached in…

Answer 2

Series

Question 3

Voltmeters are ONLY attached in…

Answer 3

Parallel

Question 4

Definition of Potential Difference:

Answer 4

The work done per unit charge. Is the pushing force.

Question 5

Describe the I-V characteristics for a Filament Lamp

Answer 5

Way to remember: Like a sin curve but on both -ve and +ve side

Question 6

Describe the I-V characteristics for a Ohmic Conductor

Answer 6

Ohms Law: Current is directly proportional to Voltage

Question 7

Describe the I-V characteristics for a Diode

Answer 7

Way to remember: Like an exponential graph but touches zero

Question 8

Current and Voltage is the same in one type of circuit and shared in another.
Which circuit is current and voltage the same in and which are they shared in?

Answer 8

Series | Parallel
Current | Same | Shared
Voltage | Shared | Same

Question 9

Is there a conservation of charge and/or current?

Answer 9

There is a conservation of both charge and current. i.e. Input = Output

Question 10

What is Kirchoff’s First Law

Answer 10

Current Input = Current Output

Question 11

What is Kirchoff’s Second Law

Answer 11

Total Voltage/E.m.f in a circuit = Sum of Voltage/E.m.f across each component