Recent postsView all

Unit Plans
2 Jun 19
Getting started?
27 May 19
Practical work (and Paper 3)
18 May 19
Group 4 Project
12 May 19
Single slit distraction
9 May 19
Extended Essay
5 May 19
26 Apr 19
IA 2019 reflections
21 Apr 19
21 Apr 19
Individual investigation
13 Apr 19
6 Apr 19
1000 questions
30 Mar 19

cable resistance

Wednesday 25 July 2018

Here's an interesting one. I got this compressor for painting my car, as it happens I'm not going to use it. All the mixing of chemicals put me off, too much like chemistry. Anyway it has other uses like blowing dust away, sand blasting and blowing up tyres. My garage is some distance from the house so I have to use two connected extension cables to connect to the mains electricity. Everything seems to work OK but the other day I used the compressor to sandblast a grill and connected it directly to the house socket. Everytime I switched it on it tripped the switch. It seems that the extra resistance of the extension leads reduce the current enough to stop this happening in the garage. Maybe all my electrical appliances are running under power? Might explain why my drill is so weak.

19 Jul 2018


To post comments you need to log in. If it is your first time you will need to subscribe.