Describe the use of an oscilloscope to display waveforms (the structure of an oscilloscope is not required)

Draw and interpret circuit diagrams with cells, batteries, power supplies, generators, oscilloscopes, potential dividers, switches, resistors (fixed and variable), heaters, thermistors (NTC only), light-dependent resistors (LDRs), lamps, motors, ammeters, voltmeters, magnetising coils, transformers, fuses, relays, diodes and light-emitting diodes (LEDs), and know how these components behave in the circuit

State that conventional current is from positive to negative and that the flow of free electrons is from negative to positive