You are using an electric lawn mower in the garden. To prevent a possible shock if you accidentally cut the wire, you need to use a:
- PCB
- MCB
- RCD
- JCB
Which one statement about the Earth wire is correct?
- It is used as a colourful addition to a plug.
- It provides a path for the current to return to the substation if there were a fault in a metal cased appliance.
- It only works with appliances with a plastic case.
- It does not need to be wired in.
Which one of these is NOT a sign of an appliance having a dangerous fault?
- A hot fishy smell from the plug.
- A socket that shows scorch marks.
- Fuse going all the time.
- The electricity meter reading gradually increasing
Which one of these is the best fuse to put into the plug of an appliance that takes 690 watts from the 230 V mains?
- 1 A
- 3 A
- 5 A
- 13 A
Which one statement is correct about charge?
- It is measured in amps and is worked out using charge = current x time.
- It is measured in coulombs and is worked out using charge = current x time.
- It is measured in amps and is worked out using charge = current / time.
- It is measured in coulombs and is worked out using charge = current / time.
A multimeter connected to the mains reads 244 V rms. What is the peak voltage?
- 122 V
- 172 V
- 244 V
- 345 V