IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Sciences => Topic started by: zara on April 11, 2009, 01:56:45 pm

Title: Tolerance band in a resistor????
Post by: zara on April 11, 2009, 01:56:45 pm

hey,
ny1 studyin IGCSE DnT can plzz tll m d purpose of a tolerance band in the resistor ???
i hv no clue to it.....
n i need d answer urgently...plzzzzz
Thanks..

Title: Re: Tolerance band in a resistor????
Post by: astarmathsandphysics on April 11, 2009, 02:03:12 pm

It is a measure of how accurate the stated resistance is. Normally a resistance has 3 or 4 bands. The 1st 3 show the value of the resistance. If there is no 4th band the accuracy is +-20%, a silver 4th band means an accuracy of +-10% and a gold band +-5%.

Title: Re: Tolerance band in a resistor????
Post by: ashgerrard on April 11, 2009, 02:39:32 pm

Do we have to know it in our IGCSE physics syllabus??

Title: Re: Tolerance band in a resistor????
Post by: astarmathsandphysics on April 11, 2009, 03:02:31 pm

Beats me. I only answer the maths and physics questions.

Title: Re: Tolerance band in a resistor????
Post by: sweetsh on April 11, 2009, 03:11:41 pm

I dont think it is in IGCSE Physics syllabus..

Title: Re: Tolerance band in a resistor????
Post by: zara on April 11, 2009, 04:54:14 pm

Thanks astarmathsandphysics for d answer.....
n its not in IG physics syllabus its in IG design and technology syllabus....