WorksheetsElectricity (Part 3)
Total questions: 30
Worksheet time: 30mins
A student forgets to use a plastic coated wire and notices that the wire connecting to the battery is very hot. Which statement below explains why the wire is hot?
The wire is not insulated and electrical energy from the wire produces heat.
The wire is not insulated and electrical energy flowing from the battery produces heat
The wire is not insulated and electrical energy from the bulb heats the wire.
The wire is not insulated and electrical energy from the switch produces heat.
When wires are connected to a battery and a light bulb in a circuit, the light bulb is lit. Which types of energy are produced by the battery and light bulb?
electrical and light
sound and light
electrical and sound
light and sound
Students made observations while constructing circuits. Which of the following would be an incorrect observation?
The path for electricity to flow must be closed
Aluminum foil cannot be used as a path for electricity to flow
Conductors, such as copper wire and iron nails, can be used to connect the energy source to the light bulb
Electricity does not flow through the circuit when the circuit is open
Students were given materials to complete a circuit to turn on one light. The materials received were 2 wires, a AA battery, and various sizes of light bulbs. What is the variable in the experiment?
Wires
Battery
Size of light bulb
Time of day
Which device or devices could be removed without breaking the electric circuit?
Only the bulb
Only the switch
The battery and the switch
The bulb and the switch
The shock you sometimes feel when you touch a metal doorknob on a dry day is electric ________.
Circuit
Current
Discharge
Resistance
An electric circuit contains a battery, a switch, and a bulb. Which of the following will MOST LIKELY happen if you add another battery to the circuit?
The bulb will not shine
The bulb will shine brighter than it did with one battery
The bulb will shine the same
The bulb will shine half as bright as it did with one battery
A thin strip of metal foil has a negative electric charge. You bring a balloon that also has a negative charge near the foil. What will MOST LIKELY happen?
The foil will bend toward the balloon
The foil will bend away from the balloon
The balloon will cause the foil to have a positive charge
The foil will cause the balloon to have a positive charge
If you hear thunder, lightning is close enough to strike you.
Sam setup the circuit as shown but noticed the bulbs did not light up. He checked and verified that all the components in the circuit are properly connected. The reason why the bulbs did not light up was because ________________________________.
the bulbs had fused
there was insufficient electrical current in the circuit
the batteries had been incorrectly connected
the bulbs had been connected incorrectly and should be connected in parallel instead
Joanne decided to carry out an experiment. She set up a circuit comprising of a battery and a bulb. She observed that the bulb lit up.
Joanne then added a battery in series to the circuit.
She added a second bulb in series to the circuit.
Finally, she added another bulb in series to the circuit.
What changes in the brightness of the bulbs did she observe?
dimmer, brighter, brighter
brighter, brighter, dimmer
brighter, dimmer, brighter
brighter, dimmer, dimmer
Caitlin noticed one of the bulbs in her electrical kit would not light up. On closer inspection, she saw that the filament in the bulb was non existent. What could have caused her bulb to be fused?
The bulb had been dropped and the filament had broke from the impact.
The filament had burnt away from absorbing too much heat generated by the electric current.
Too much electric current flowing through the filament caused the filament to melt.
The oxygen in the bulb undergo combustion from the heat generated by the electric current and burnt away the filament.
Which switches must be pressed to make bulb X come on?
1 and 2 only
1 and 3 only
2 and 3 only
all three of them
How can you measure the voltage across
the bulb in this circuit?
Connect a voltmeter between points 1 and 2.
Connect an ammeter between points 1 and 3.
Connect a voltmeter between points 3 and 4
Connect a voltmeter between points 4 and 5.
What happens if a large electric current flows through your body?
Your heart could stop working.
Your eyeballs could explode.
Nothing at all.
It will improve your circulation.
Which of these is not a good rule for using electricity safely?
Never use electrical appliances with wet hands.
Turn off the power pack before you make any changes to your circuit.
Plug as many things as you can into each socket.
Do not poke things into sockets.
A fuse is:
a metal strip that bends when it is hot
a piece of wire that melts when it gets too hot
a piece of plastic that does not let electricity through
the part of a plug that sticks into a socket.
How can you add resistance to a circuit?
Make the wire in the circuit longer.
Make the wire in the circuit thinner.
Add another appliance/bulb connected in series.
All of these.
