Topic 1 - Flashcards
Define “amperes”
Unit for current (amp for short) - A
Define “current”
The flow of free electrons or charge, and have a charge of -1
Define “voltage”
The push that moves electrons. Measures in volts (V)
Define “joules”
The unit of energy
Define “resistance”
How easy or difficult it is for the electrons to flow
Define “ohms”
Unit for resistance
Define “coulombs”
Unit of charge (C)
How does induction produce an induced charge?
The magnet pushes the electrons through the wire. When you take the magnet out, the electrons go back again.
What does induction mean
Making / to make
If you rub a balloon and electrons move off the balloon and onto your hair, are you positively or negatively charged?
Your hair becomes negatively charged, and the balloon becomes positively charged
If a balloon is negatively charged, what happens to the atoms in the wall to make it stick?
The electrons attract the protons in the wall and repel the electrons in the wall. One side of the wall becomes positively charged (the side closest to the balloon) and the other side becomes negatively charged.
What is static electricity
The build up of charge in one place
What does discharge mean
When the electrons rebalance themselves
Why can only negative particles be transferred?
Because the protons and neutrons are locked in the nucleus, whereas electrons can move
Define “Diode”
Directs current in one direction only
