Question

manganin wire of length L, and radius R has a resistance of 40 ohms. How would the resistance of the wire change when: (a) Only length of the wire becomes twice (b) Only diameter of the wire becomes half​

Answer 1

Answer:

case 1

resistance will be 40×4or 160 ohms

case 2

resistance will be 40×2×4 or320 ohms

Explanation:

volume is constant for each case

Answer 2

Answer:

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