Which generator is used to generate high potential differences using static electricity?
Van der Waals generator
Van der Graaff generator
Van Gogh generator
What makes a Perspex rod become positively charged?
Gain of electrons
Loss of electrons
What makes a polythene rod become negatively charged?
What is this the circuit symbol for?
Indicator
Diode
Cell
Light-emitting diode
Heater
Fixed resistor
Fuse
Variable resistor
True or false? Current can be defined as the rate of the flow of charge (coulombs per second).
True or false? Potential difference can be defined as the work done by each unit of charge (joules per coulomb).
What is the SI unit of resistance?
Tesla
Lux
Ampere
Ohm
Volt
Coulomb
True or false? The equation connecting current, resistance and potential difference is R = VI.
What is an ohmic conductor?
A special type of conductor developed by Georg Ohm
An electrical component whose current and potential difference are directly proportional at a constant resistance and temperature
A conductor whose resistance is greater than 100 ohms
For which electrical component would this current-potential difference graph apply?
Thermistor
Light-dependent resistor
Filament bulb
True or false? The resistance of a thermistor decreases as temperature increases.
True or false? The resistance of a light-dependent resistor increases as light intensity increases.
True or false? In a series circuit, the same current passes through all components.
True or false? In a series circuit, the potential difference across each component is the same.
If there were two resistors in series, each with a resistance of 0.6Ω, what would be the total resistance?
0.6Ω
6Ω
1.2Ω
12Ω
True or false? In a parallel circuit, the total current is shared through the components.
True or false? In a parallel circuit, the potential difference is shared across the components.
If there were two resistors in parallel, each with a resistance of 0.6Ω, what would be the resistance in any one "loop" of the circuit?
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