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Type: Multiple-Choice
Category: Magnetism and Electricity
Level: Grade 10
Author: avadhitalera
Created: 2 weeks ago

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Magnetism and Electricity Question

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Grade 10 Magnetism and Electricity

A wire of radius r has resistance R. If it is stretched to a radius of 3r/4, its resistance becomes                .
  1. 9R/16
  2. 16R/9
  3. 81R/256
  4. 256R/81
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