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Electrial Circuits
Name the components
Question | Answer |
---|---|
Changes resistance (like a dimmer switch) | variable resistor |
Allows current to travel in only one direction | diode |
Completes a circuit to allow current to flow | Closed switch |
Breaks a circuit to stop current flowing | Open switch |
Measures current | annometer |
Measures potential difference | voltmeter |
Stores electrical charge | battery |
Unit of resistance | ohm |
Unit of current | amp or ampere |
Unit of potential difference | volt |
The law defining the relationship between voltage, current and resistance | Ohm's Law |
The formula for Ohm's Law (providing temperature remains constant) | V = I x R, I = V/R , R = V/I |