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OpenStudy (anonymous):

I have a question in Resistance.

OpenStudy (anonymous):

OpenStudy (anonymous):

Can anyone give any good websites where I can practice questions on "Electric Resistance" and "Magnetism"?

OpenStudy (anonymous):

resistance per unit length=36/(2*pi*r); resistance of the small part=(36/(2*pi*r))*(pi*r/3)=6; and similarly resistance of small part=30 and they are in parallel so reistance=(30*6)/(30+6)=5

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