Electricity Flashcards
Which circuit component is represented by the following diagram?

Variable Resistor
What happens if a positive and a negative charge are brought together?
They attract each other
What is the energy change in a lamp?
Electrical to light (+ heat)
Name one source of AC
Mains supply
What is the rule for current in a series circuit?
The current is the same everywhere
What happens if two positive charges are brought together?
They repel each other
What is the energy change in a buzzer?
Electrical to sound
Which circuit component is represented by the following diagram?

Capacitor
What is a Light Dependent Resistor?
A resistor whose resistance changes with changes in light level
What is the charge on a proton?
Positive
What is current?
The charge transferred per second
What would happen to an electron being fired through the electric field below?
It would experience a force and be attracted to the positive plate.

How does a relay work?

- Close a switch to make a current flow in a wire.
- This creates an electromagnet.
- Electromagnet attracts metal switch.
- This completes the second circuit and the lamp switches on.
What is the energy change in an LED?
Electrical to light
Which device measures voltage?
Voltmeter
Which particles are in the nucleus of the atom?
Protons and Neutrons
What will be the voltage across a capacitor when it is fully discharged?
Zero volts.
What happens if you increase the resistance in a circuit?
The current will decrease
Which circuit component is represented by the following diagram?

Loudspeaker
What is DC?
Direct current. Electrons move in one direction only.
Which component does the symbol represent?

Buzzer
Which circuit component is represented by the following diagram?

Thermistor
What would the field lines around a positive point charge look like?
Field lines show direction away from the positive point charge.

How can you identify a series circuit?
It is a circuit with only one path round it.






























