What is a transistor?
An electrical switch
A type of resistor
None of the above
How do you magnetise an iron bar using a magnet
Stroking it back and forth
Stroking it only one way
All of the above
How do you demagnetise an iron bar using coil
Leave it in the coil for a few minutes
Keep moving it in and out of the coil for a few time
Take it out of the coil
If lamp A has a current of 1.5 what will the current be in lamp B?
If the switch was closed, which lamp will turn on?
The one in the middle
The one at the top
Both of them
None of them