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WorksheetsRECF Electricity Practice
Total questions: 36
Worksheet time: 56mins
What is voltage measured in?
Ω (Ohms)
V (Volts)
A (Amps)
W (Watts)
What is current measured in?
Ω (Ohms)
V (Volts)
A (Amps)
W (Watts)
What is resistance measured in?
Ω (Ohms)
V (Volts)
A (Amps)
W (Watts)
How do you calculate voltage?
Current X Resistance
Resistance ÷ Current
Current ÷ Resistance
Measure it with a ruler
How do you calculate current
Resistance X Voltage
Voltage X Resistance
Resistance ÷ Voltage
Voltage ÷ Resistance
What word means how much energy is given to / removed from the electrons.
Current
Voltage
Resistance
Power
What word means how hard it is for electrons to flow through.
Current
Voltage
Resistance
Power
What word means how fast the electrons flow.
Current
Voltage
Resistance
Power
Identify this electronic testing tool
GPS Tracker
Jump Wire
Multimeter
Breadboard
what is this symbol for?
light bulb
cell
battery
resistor
What is the following symbol represent?
Wire
Resistor
Battery
Switch
Conservation of energy means that
energy can be created but not destroyed
energy can be destroyed but not created
energy can be both created and destroyed
energy can be neither created nor destroyed
Kinetic energy can be described as
energy in motion
stored energy
a chemical reaction
connected energy
Which of the following actions would increase the amount of force applied to the wheels of the toy car?
decreasing the number of loops in the electromagnet's coil
decreasing the electric current running through the electromagnet
replacing the magnet with a stronger magnet
increasing the distance between the magnet's poles and the electromagnet
The motor is used to lift metal boxes. How can the motor be changed to be able to lift a heavier box?
change the polarity of the magnet
add more loops of wire between the magnets
rotate the coil in a counter-clockwise direction
decrease the size of the magnets
What can be done to make the coil rotate faster?
change the polarity of the magnets
decrease the size of the magnets
use a plastic wire loop
add one more battery
a motor converts electrical current into
chemical energy
chemical force
mechanical force
mechanical life
What must be complete for a circuit to work?
The wires must be colored
A light bulb must be present
A battery must be fully charged
The path must be complete
The motor seen in the images is an example of...
A brushed DC motor.
A brushless AC motor.
A magnetic motor.
A broken motor.
A brushless motor is more efficient than a brushed motor because...
There is less energy lost inside the motor due to friction and heat.
There is less power used to spin the motor.
There is less noise created in spinning the motor.
This is an incorrect statement. Brushed motors are more efficient.
The part of an electric motor that doesn't spin is called the...
armature
commutator
stator
bearings
In the image shown, the dark grey shapes are called:
Brushes
Armatures
Commutators
Windings
What is the electronic device that sits between the battery and the brushless motor?
Electronic speed controller
Electronic armature controller
3-phase controller
Receiver
What is part A of a Brushed Motor (The loop of wire that creates the magnetic force)
Coil
Brush
Stator
Rotor
Commutator
What is part B of a Brushed Motor (The part that spins)
Coil
Brush
Stator
Rotor
Commutator
What is part C of a Brushed Motor (The part that switches the direction of the magnetic field)
Coil
Brush
Stator
Rotor
Commutator
What is part D of a Brushed Motor (The part that doesn't move)
Coil
Brush
Stator
Rotor
Commutator
What is part E of a Brushed Motor (The wires that physically touch the spinning parts)
Coil
Brush
Stator
Rotor
Commutator
Part A
Hall Sensors
Electronic Controller
Stator
Rotor
Stator Windings
Part B
Hall Sensors
Electronic Controller
Stator
Rotor
Stator Windings
Part C
Hall Sensors
Electronic Controller
Stator
Rotor
Stator Windings
Part D
Hall Sensors
Electronic Controller
Stator
Rotor
Stator Windings
Part E
Hall Sensors
Electronic Controller
Stator
Rotor
Stator Windings
Which component in a circuit is used to limit the flow of current?
Capacitor
Switch
Battery
Resistor
What is the main function of a commutator in a brushed motor?
To increase resistance
To measure voltage
To switch the direction of current
To store electrical energy
