Question

A wire of resistance 10 ohms is doubled on itself. What is the new resistance?
1) 5 ohm
2) 20 ohm
3) 40 ohm
4) 80 ohm
Class 10
Only tell the option no

Answer 1

Answer:

You will increase the resistance by a factor of four, having doubled its length (double the resistance) and reduced the cross sectional area to half (doubling it again).

Explanation:

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