Write an experiment to show wood is a insulator of elecricity.
Answers
Aim
To examine the nature of conductors and insulators
Make a table listing all of the substances you intend to test to see if the substance is a conductor or insulator. Make a column headed prediction then another column indicating whether the substance is an insulator or a conductor. Write down whether you think it will conduct electricity before you perform your test then perform the test to check whether your prediction is correct or incorrect.
Apparatus (Equipment)
1 x DC variable power supply, with a nominal range from 2 to 12 V.
1 x 6V 10 W light globe
2 x conducting leads with alligator clips
2 x conducting leads with suitable attachments for battery or power pack
1 x tapping key switch
Various materials to test between contacts, e.g. wood, paper, plastic, alfoil, copper plate, a nail, glass sheet, Perspex rod, etc.
Method
The circuit below was setup :
Label all the symbols used on the circuit diagram. Why is there a break in the circuit?
The variable DC power supply was set to the 6 V setting.
The different test materials were, one at a time, attached between the contacts.
The power was then switched ON and careful observations on the appearance of the light globe were made and any reading on the ammeter was noted.
The observations were recorded.
This was repeated for each of the test materials.
The results were recorded, analysed, and then a conclusion written