WorksheetsCSHS Year 8 Physics Revision QUIZ
Total questions: 67
Worksheet time: 48mins
unit of measure for energy
Joules
simple carbohydrates
complex carbohydrates
glucose
Weight is best described as
An objects resistance to acceleration
What causes an object to fall
The downward force exerted on a mass due to gravity
A force solely dependent on an objects mass
Amy wants to investigate which brand of batteries last longer. She want to use her MP3 player to test them.
Which of the following is the independent variable?
Volume of the MP3 player
Time of playing
Brand of batteries
Status of batteries (new/used)
Size of batteries (AA, AAA, C, D...)
Bob wants to investigate whether we feel warmer or cooler when wearing shirts of different colours. He designed an experiment: putting thermometers into paper bags of different colours and placing them under a table lamp for 1 hour.
Which of the following is the independent variable?
Time of putting under the lamp
Colour of paper bags
Type of thermometer
Size of the paper bags
Temperature of paper bags
Bob wants to investigate whether we feel warmer or cooler when wearing shirts of different colours. He designed an experiment: putting thermometers into paper bags of different colours and placing them under a table lamp for 1 hour.
Which of the following is the dependent variable?
Time of putting under the lamp
Colour of paper bags
Type of thermometer
Size of the paper bags
Temperature of paper bags
In the water circuit model of electricity, what does the water pump or elevated water storage tower represent?
A) Electrical resistance
B) Voltage (potential difference)
C) Electrical current
D) An open switch
In an electric circuit, electric current is the flow of charge (measured in amperes). What is the equivalent in the water pipe model?
A) The rate of water flow in litres per second
B) The total thickness of the plastic pipe wall
C) The water pressure pushing from the tap
D) A tap that is completely turned off
In a garden reticulation (sprinkler) system, sprinklers are connected in a series line along a single pipe. If a gardener accidentally cuts the pipe before the first sprinkler, what happens to the remaining sprinklers?
A) They all stop spraying immediately.
B) They spray with twice as much pressure.
C) Only the last sprinkler stops spraying.
D) Water flow increases to the other heads.
In a parallel reticulation system, each sprinkler is on its own separate branch connected to the main supply. If one sprinkler head blows off and leaves an open, unrestricted pipe, what will happen to the system?
A) Water stops flowing entirely across all branches of the reticulation system.
B) The broken branch draws a very high flow of water, causing a drop in water pressure to the other parallel sprinklers.
C) All other sprinklers immediately double their water output.
D) Nothing changes in any branch because all branches are completely isolated.
Which standard circuit symbol represents a component that allows a user to open or close an electrical pathway?
What is the difference between a single electrical cell and a battery in circuit terminology?
A) A cell is rechargeable, but a battery is not.
B) A battery consists of two or more cells connected together.
C) A cell only produces alternating current (AC).
D) A cell has higher voltage than any battery.
Two identical 6V globes are connected in series to a 6V battery. Compared to a single globe connected to the same battery in parallel, the two globes will:
A) Shine with normal brightness
B) Shine brighter
C) Shine dimmer
D) Not turn on at all
Two identical globes are connected in parallel across a 12V power supply. What voltage does each individual globe receive?
A) 6V each
B) 12V each
C) 24V each
D) 0V each
If one globe unscrews or "blows" in a series circuit containing three globes, what happens to the remaining two globes?
A) They stay lit with the same brightness.
B) They immediately go out because the circuit is broken.
C) They get significantly brighter.
D) They flash on and off repeatedly.
Why are the lights and appliances in Australian homes wired in parallel rather than in series?
A) Parallel circuits use much thinner wires and require no switches.
B) Each appliance receives full mains voltage and can be switched on or off independently.
C) Parallel circuits prevent any electric current from returning to the power plant.
D) Series circuits require too many fuses to function safely.
In a parallel circuit, a total current of 3.0 A leaves the battery. The current splits into two branches. If branch 1 carries 1.2 A, how much current flows through branch 2?
A) 4.2 A
B) 3.0 A
C) 1.8 A
D) 0.6 A
Electrical power is defined as the rate at which electrical energy is transformed. What unit is power measured in, and what does it represent?
A) Volts (V), which equals Amperes per second
B) Watts (W), which equals Joules per second (J/s)
C) Amperes (A), which equals Coulombs per Volt
D) Ohms (Ω), which equals Joules per Ampere
An electric kettle connected to a 240V mains supply draws a current of 10 A. Using the formula Power = Voltage × Current (P = V × I), what is the power rating of the kettle?
A) 24 W
B) 240 W
C) 2400 W
D) 24 00 A
A 100 W traditional incandescent light globe and an 11 W LED globe both produce the same amount of visible light. What does this comparison tell us about energy transformation?
A) The LED transforms 11 Joules of electrical energy per second, wasting far less energy as heat than the 100 W incandescent globe.
B) The incandescent globe transforms fewer total Joules per second than the LED globe.
C) The LED globe requires higher voltage than the incandescent globe to light up.
D) Both globes consume identical amounts of electrical energy every hour.
24. The Sankey diagram shows the energy changes in a lamp. Which statement is correct?
A) 75 J is useful light energy and 25 J is wasted heat energy.
B) 25 J is useful light energy and 75 J is wasted heat energy.
C) The lamp transfers 25 J of energy in total.
D) No energy is wasted because all 100 J becomes light.
Use the Sankey diagram. What is the motor’s energy efficiency?
A) 10%
B) 20%
C) 80%
D) 125%
How does a traditional fuse protect a household circuit from thermal overload and electrical fires?
A) It absorbs excess voltage and converts it into useful radio waves.
B) Its thin internal wire melts and breaks the circuit when current exceeds a safe limit.
C) It mechanically resets itself every ten seconds to cool the wires.
D) It reverses the direction of current back into the power grid.
What is the primary function of a Residual Current Device (RCD) or safety switch in a modern home?
A) To measure monthly electricity consumption for billing purposes.
B) To detect any imbalance between active and neutral currents (indicating current leakage to earth/person) and disconnect power in milliseconds.
C) To boost household voltage whenever too many appliances are turned on.
D) To replace all wall switches with wireless remote controls.
Mr Harris got too excited while hunting and jumped out of his Prado to chase a fox , but upon returning to his car found out that he had left the car’s spotlights on and had flattened the battery (true story). While replacing the battery with a spare, he accidentally touched the battery’s positive and negative terminals against the metal frame of the car at the same time. Why did he wake up moments later, ears ringing, with the smell of singed hair and smoldering clothes in the air?
A) Touching both terminals disconnected the battery, so no current flowed.
B) Touching both terminals connected an electrical circuit. With almost no resistance, a very high current caused sparks, a fire and the battery to explode.
C) The metal frame increased the battery’s resistance, so the current slowly heated the car.
D) The battery changed from direct current to alternating current, which caused the burns.
Name who this is.
"Bro walked into the room with infinite aura, dropped zero words, and still completely farmed a million aura points."
Mr Harris
Mr H
Mr Harris
Mr H
