Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What is potential difference and what is it measured in?
   • Potential difference is the difference in Energy between two parts of a circuit, and is measured in volts.
2. What is electric current?
   • Electric current is the flow of charge and is measured in amperes. KS4: Add 'rate of' to definition and then define the coulomb.
3. What do we use to measure potential difference and how must we do it?
   • Potential difference is measured using a Voltmeter which must be placed in parallel with a component.
4. What charged particles are able to move in a metal?
   • The charged Particles able to move in a metal are electrons. So in a metal, current is the flow of electrons.
5. How can we describe current and how do we measure it?
   • Current is the amount of charge flowing around a circuit. We measure it using an ammeter placed in series in a circuit.
6. What is the store of energy in potential difference caused by?
   • Potential difference is a store of Energy caused by the compressing of a charge Particle's electric field.
7. What happens to current when branches in a circuit meet and why?
   • Charge can not be created, destroyed or be stored on a wire, therefore currents add where branches meet.
8. What happens to the potential difference in a series circuit?
   • Potential differences in series add up, for example adding Cells - direction important.
9. What happens if we don't match the potential difference ratings of the battery to the bulb in a circuit?
   • Battery and bulb (p.d.) ratings need to be matched otherwise too much Energy transfer will cause the bulbs to melt.