Scottish 2nd Level Bitesize
Home > Sciences > Forces, electricity and waves > Electrical circuits
In a simple series circuit, why does the bulb light when you close the switch?
Because the switch produces electricity
Because closing the switch completes the circuit
Because closing the switch breaks the circuit
In a simple series circuit, why does the bulb go out when you open the switch?
Because the battery goes flat
Because opening the switch breaks the circuit
Because too much electricity flows through the bulb
Imagine a simple series circuit with one 1.5V battery and one bulb. When the 1.5V battery is replaced with a 3V battery ...
the bulb gets brighter
the bulb gets dimmer
the bulb stays at the same level of brightness
Imagine a circuit with a 1.5V battery and one bulb. Imagine a similar circuit with a 3V battery and two bulbs. Which has the brightest bulbs?
The circuit with a 1.5V battery and one bulb
The circuit with a 3V battery and two bulbs
The bulbs in both circuits are of similar brightness levels
Why might a bulb flash and go out when a 1.5V battery and a 3V battery are both connected across it in a simple series circuit?
There is not enough electricity flowing around the circuit
Too much electricity flows through the bulb's filament and the bulb blows
The batteries are flat
What is the effect of changing the wire in a circuit from a straight thick wire to a straight thin wire?
The bulbs become dimmer
The bulbs become brighter
The bulbs stay at the same level of brightness
What is the effect of changing the wire in a circuit from a straight thick wire to a longer (coiled) thick wire?
In a circuit diagram, what does a circle with a cross inside it represent?
A light bulb
What do the long straight lines represent in a circuit diagram?
How is a battery represented in a circuit diagram?
A circle with a cross inside it
A circle with an M inside it
A long line and a short line