Electric Circuits 1
Identify the piece of equipment that is used to measure electric current.
Ammeter
The formula for VOLTAGE is
Resistance x Electric Current
R x I
Identify the piece of equipment that supplies electric current.
Battery/Cell/Powerpack
The electrical energy from a light globe is converted into ____________________
Heat (Infrared) and Light energy
Identify the piece of equipment that is used to measure voltage.
Voltmeter
Identify the electrical component that acts as a resistor
a) Battery/Power pack
b) Switch
c) Light globe
Light globe
The formula for calculating RESISTANCE is
R = V/I Resistance = Voltage / Electric Current
Voltmeters are arranged __________ to other circuit components in both series and parallel circuits.
parallel
In most electrical appliances energy is lost as _______
heat
The unit for electric current is ____________
A or amps
If one light goes out in a series circuit the other light globes will .....
be affected and also turn off.
Calculate the VOLTAGE for a circuit with current flowing at 5 amps and resistance at 3 ohm.
V = I x R
= 5 x 3
= 15 V
Identify the material that acts as a conductor of electrical energy and is present in most household circuits.
Copper
Identify all the different types of energy present in a stereo.
Sound energy
Electrical energy / Chemical energy (batteries)
As VOLTAGE is INCREASED the ELECTRIC CURRENT
also increases
If one light goes out in a parallel circuit the other light globes will .....
not be affected and remain on.
Calculate the ELECTRIC CURRENT for a circuit with resistance at 2 ohm and voltage at 20V
I = V/R
= 20 / 2
= 10 amps
The circuits in all households are arranged as a ....
parallel circuit
Identify the different types of energy present in a lamp.
Light energy
Heat energy
Electrical energy / Chemical energy (batteries)
Identify one CONDUCTOR and one INSULATOR.
Conductor - metals
Insulator - plastic / rubber / ceramic
There is 3 switches present next to 3 light globes in a parallel circuit.
What happens to the other light globes if one light globe burns out.
The other light globes will be unaffected.
Calculate the resistance for a circuit with a VOLTAGE at 30V and ELECTRIC CURRENT at 6 amps.
R = V/ I
= 30 / 6
= 5 ohm
There is 3 switches present next to 3 light globes in a series circuit.
What happens to the other light globes if one light globe burns out.
The other light globes will also go out.
Identify the forms of energy present in a wind turbine.
Kinetic/Mechanical energy/ Electrical energy
Describe electric current at a particle level.
Flow of electrons around a closed electric circuit.