What is a material that lets electricity pass through it called? An electrical insulator An electrical conductor An electrical appliance Next What is a material called that does not electricity pass through it? An electrical conductor An electrical insulator An electrical appliance Next Which of these materials is an electrical insulator? Rubber Copper Aluminium Next Which of these materials is an electrical conductor? Silver Plastic Cork Next In which circuit will the bulb glow brightest? A simple circuit with two bulbs and one battery A simple circuit with one bulb and one battery A simple circuit with two batteries and one bulb Next Why is a bulb brighter if there are more batteries in the circuit? There is a greater flow of electricity There is less electricity flow The electricity flow is the same Next David has a simple circuit with two bulbs and two batteries. How can he make the bulbs dimmer? Remove one battery and replace it with a section of wire Remove one battery and replace it with a cork Remove both bulbs Next David has a simple circuit with one bulb and three batteries. The bulb lights but then goes out. Why? Too much electricity flows through the bulb’s filament The batteries go flat The circuit doesn’t have enough electricity flowing around it Next Why is electrical wiring usually made from copper? Because copper is expensive Because copper is not magnetic Because copper conducts electricity Next Why are electrical wires usually covered with plastic? To make it look colourful To make it safe To make bulbs brighter Next
