Physics

- An ammeter measures electric current in a circuit.

- Electric current is measured in amps (A).

- All matter consists of atoms, which are neutral particles.

- Attraction is the pulling together of objects, such as opposite magnetic poles or positive and negative charges.

- A battery consists of two or more electrical cells joined together.

- A cell is a chemical energy store that pushes charge around a circuit.

- Conductors efficiently conduct charge or energy; metals and graphite are examples.

- A core of magnetic material inside a coil strengthens an electromagnet's magnetic field.

- Current is the flow of electrical charge (electrons) in a complete circuit per second.

- Electric charge is a material or particle property that can be positive or negative.

- An electrical field is a region where a charged material or particle experiences a force.

- An electromagnet is a temporary magnet produced by electric current.

- Electrons are negatively charged particles in atoms that flow in a wire when current flows.

- Insulators do not conduct electricity or transfer energy well.

- Lightning involves a current through the air, producing light and sound.

- A magnetic field is a region where a force acts on a magnet or magnetic material.

- Magnetic field lines are imaginary lines showing the direction of force on magnetic material.

- Magnetic materials are attracted to magnets, including iron, steel, nickel, and cobalt.

- To magnetise is to turn something into a magnet.

- Negative charge is the charge on an electron or an object with transferred electrons.

- Neutral describes an object or particle with no net charge, where positive and negative charges cancel out.

- Neutrons are neutral particles found in atoms.

- The north pole of a magnet points towards the north.

- Resistance is measured in ohms (Ω).

- A parallel circuit has two or more loops for the current.

- Positive charge is the charge on a proton or an object that has lost electrons.

- Potential difference measures the push of a cell or battery, or the energy it supplies.

- Protons are positively charged particles in atoms.

- Rating is the potential difference at which a cell or bulb should operate.

- Repulsion is the pushing away of like objects, e.g., like magnetic poles or like electrical charges.

- Resistance indicates how difficult it is for current to flow.

- A series circuit has components joined in a single loop.

- The south pole of a magnet points towards the south.

- A switch controls current by making or breaking the circuit.

- Voltage is the measure of a cell or battery's strength to send current around a circuit.

- A voltmeter measures voltage.

- Voltage is measured in volts (V).