Current&Circuits

Question 1

When will current only flow?

Answer 1

Currently only flow through a component if there is a potential difference across that component

Question 2

The Weaker/Greater the resistance across a component, the Smaller/Bigger the current that flows

Answer 2

The greater the resistance across a component, the smaller the current that flows

Question 3

What does the total charge through a circuit depend on ?

Answer 3

Current and time

Question 4

What is the equation for current, charge and time?
Current= I
Charge= Q
Time = t

Answer 4

Current = Charge
___________

              Time 

I= Q Q
____ Or ______
t I X t

Question 5

What are the units for current, charge and time?

Answer 5

Current = amperes = A

Charge = coulombs = C

Time = seconds = s

Question 6

What is current?

Answer 6

Current is the flow of electric charge round the circuit.

Question 7

What is the equation for potential difference?

Answer 7

P.D = work done
______________

        Charge

Question 8

What does an ammeter measure ?

Answer 8

An ammeter measures the current flowing through the component

Question 9

What does a voltmeter measure?

Answer 9

A voltmeter measures the potential difference across the component