Numerical
Asked by
| 2nd Nov, 2008,
10:33: PM
Expert Answer:
(a)R = ρ l / a , using this formula you can calculate the required length of copper wire.
Here , a =∏( d/2)2 .
(b) In this case resistivity and length remains same , diameter = d/2. Find the resistances, say as R1 and R2 in the two cases and calculate the ratio.
Answered by
| 4th Nov, 2008,
09:43: PM
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