Ohms law
Electricity
Voltage and Current
Resistance
Energy
100
By increasing the diameter of the wire you do this to the resistane
Decreases resistance
100
What is the charge of electrons?
negative
100
What are the units of potential difference?
volts
100
What is the unit of resistance?
Ohms
100
Name 5 different types of energy
kinetic, potential, chemical, thermal, electrical, nuclear, mechanical, radiant (light), sound, elastic
200
Using a 5 cm piece of wire rather than a 2 cm piece of wire will do this to the resistance.
Increases resistance
200
What object is represented by the circuit symbol below? 
ammeter
200
How are voltmeters connected in a circuit?
In parallel, across a load/source
200
Equation to calculate voltage
V = I × R
200
State the law of conservation of energy
Energy cannot be created or destroyed; it can only be transferred or transformed
300
In a circuit, if voltage is 6V and resistance is 3Ω, what is the current?
I = V ÷ R = 6 ÷ 3 = 2 amperes.
300
What are the four main components of an electric circuit?
a load, source, conductor (wires), and switch.
300
How many milliamperes are in one ampere?
1000 mA in 1 A
300
Are loads resistors? Explain your answer
Yes- during the process of converting electrical energy into another form, resistance occurs
300
A fan transforms electrical energy into what two forms of energy?
Kinetic and thermal energy
400
If a load measures a voltage of 4V and has 0.2A of current running through it, what is the resistance of the load?
R= V/I= 4/0.2= 20 Ohms
400
What is the name of an energy source that uses chemical reactions to generate electricity?
electrochemical cell
400
The voltage of bulbs in a series circuit are 1.5V, 0.8V, and 1.2V. What is the voltage of the source?
Series voltage is split therefore: 1.5+0.8+1.2V= 3.5V
400
Resistance changes in series and parallel circuits. Which type of circuit has a higher resistance?
Series circuit
400
Equation to calculate energy efficiency as a percentage?
(Useful energy output ÷ Total energy input) × 100%
500
A lightbulb has a current of 600mA and a resistance of 110 ohms. What voltage would be measured across the lightbulb?
V=IR = 0.6x 110= 66 Volts
500
What type of circuit is shown below? 
parallel circuit
500
The current on the main branch of a parallel circuit is 12A (this is the current before it splits). If the first branch of the circuit measures a current of 9.5A, what is the current on the second branch?
Total current= sum all branches of current
12A-9.5A= 2.5A
500
To increase the resistance of a wire you could do this to the temperature
Decrease temperature
500
What unit is used to measure energy consumption in appliance star ratings?
Kilowatt-hours (kWh) per year