Difference between ac and dc

Mains frequency
and
Mains voltage

What are plugs made of?
What are wires made of?
What are pins made of?

Diagram of a Plug

How to determine the frequency of an a.c. supply

How do fuses work?
How does an RCCB work?

Comparison of RCCB and Fuse

Why do appliances with plastic cases not need earthing?

How Earth wire protects user

What is an isotope?

Natural Sources of Background Radiation

Artificial Sources of Background Radiation

Nature of alpha radiation
Nature of beta radiation
Nature of gamma radiation

Charge of alpha radiation
Charge of beta radiation
Charge of gamma radiation

fastest type of radiation

Most penetrating type of radiation?

Which type of radiation is the most ionising?

Uses of radiation

Plum pudding model of nucleus and why it was rejected

Nuclear model of nucleus and why it was accepted.

What happens in alpha particle emission?

What happens in beta particle emission?

What is a half-life?

What is nuclear fission?
Where does it occur and with which substances?

What is nuclear fusion?
Where does it occur?

What happens in a nuclear reactor?

What to do if a fuse blows/RCCB trips when a mains appliance is in use

What to do if an appliance overheats and/or you get a distinctive burning smell from it

What is radon gas and why is is dangerous?

How do people who work in jobs involving the use of ionising radiation stay safe?

Dangers of Radiation

In deflection, why is an alpha particle deflected much less than a beta particle?

What is ionisation?