Resistance que.???

Question

A wire of resistance 10 ohm is bent in the middle at 18 degree .Its two halves are mutually connected.Its new resistance will be
1. 10 ohm
2. 30 ohm
3. 5 ohm
4. 2.5 ohm

Answer 1

You can think of it logically and arrive at the conclusion.

A wire is 10 ohms
If you take half of it, it's 5 ohms
If you make two of them in parallel, it's half of 5 ohms, which is 2.5 ohms.

Answer 2

This sounds like your basic trick question to me. Lets see if I understand what you are asking: take a straight wire of any length and its measured resistance is 10 ohms, as measured from one end of the wire to the other. You are asking what would the resistance of this wire be if I bent it in the middle by 18 degrees? If nothing else is done to the wire at this point, the resistance would still be 10 ohms, because the length of the wire, nor its diameter, has changed as a result of bending the wire. However, by mutually connected, you mean that the two wire ends are connected together in parallel, then the resistance would be 5 ohms as measured from the end to the bend in the wire.