How does the resistance of a wire change when its length is tripled second radius is tripled third material is changed to one whose resistivity is three times?
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Answer:
- Increase by thrice
- Decreases by 9 times
- Increase by 3 times
Explanation:
We know that resistance=resistivity*length/area
- When length is tripled then resistance increases to 3times
- When radius is tripled then resistance decreases by a factor of 9.
- When the resistivity is tripled then the resistance increases by 3 times
- When all these changes are simulatneous then the resistance remains the same.
Hope you find helpful . please thanks
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