Question | Answer |
A build up of charge on an insulator is known as? | Static electricity |
Insulators become charged by ............... between the cloth and object | Friction |
Static electricity is found only on these? | Insulators |
These allow current to flow through them? | Conductors |
These prevent damage to buildings if hit by lightning? | Lightning rods |
A lightning rod must be made of ............. as they allow electricity to flow through them | Metal |
When Voltage is proportional to current at a fixed temperature this is known as? | Ohm's law |
A straight line graph shows a .................... relationship? | Proportional |
Unit of current | Amp |
Unit of resistance | Ohm |
Unit of voltage | Volt |
Another word for voltage | Potential difference |
This electrical quantity provides the force to push the electrons around a circuit? | Voltage |
This is a measure of how difficult it is for electrons to flow in a circuit? | Resistance |
A flow of electrons is known as the? | Current |
The symbol for voltage? | V |
The symbol for resistance is? | R |
The symbol for current? | I |
The formula used to calculate voltage? | V = IR |
Current flows from this terminal to this terminal in a battery? | Positive to negative |
The unit of energy consumption used by ESB? | kilowatt hour |
Formula used to calculate the current used? | I = V/R |
A device used to reduce the current flowing in a circuit? | Resistor |
The type of circuit that when one bulb blows they all go out because circuit is broken? | Series |
The type of circuit that when one one bulb blows the other stays lighting because two paths for current to flow in? | Parallel |
Current that flows in one direction only? | Direct current |
Current that is constantly changing direction? | Alternating current |
The number of volts in the mains? | 230 |
The type of current in the mains? | Alternating current |
Electrolysis is an example of the ........... effect of an electric current? | Chemical |
The use of a toaster or kettle uses the .......... effect of an electric current? | Heating |
The electromagnet in a scrap yard uses the .......... effect of an electric current? | Magnetic |
For current to flow the circuit must be? | Complete |
A circuit breaker uses the .............. effect of an electric current? | Magnetic |
A fuse uses the ............ effect of an electric current? | Heating |
This is a safety device that breaks the circuit if its rating is exceeded because the wire inside of it melts? | A fuse |