What are the particles responsible for transferring electrical energy from a cell, through conducting wires in an electric circuit?
Free electrons
Protons
Coulombs
What is the relative charge of an electron?
+1
0
-1
What is the unit of electric charge?
Coulomb C
Ampere A
Volts V
What is the unit of electric current?
Which equation correctly links the quantity of charge Q, Current I and time t.?
Q = I x t
Q = I ÷ t
I = Q x t
A current of 2.5 A flows through a simple electrical circuit. How many coulombs of charge flow through a point in 2 minutes?
1.25 C
5C
300 C
How much current flows when 50 C passes down a wire in 10 s?
0.2 A
5 A
500 A
What instrument is used to measure electric current?
A voltmeter
An ammeter
A current meter
Where should an ammeter be connected in an electric circuit?
In series
In parallel
Before a component in the circuit but not after it
A current of 12 A flows. How long does it take for 1440 C to pass a point in the circuit?
8.3 ms
120 s
17,280 s