A wire's resistance is 8 ohms. If it's stretched to twice its length, what is its new resistance?
Q1. A wire's resistance is 8 ohms. If it's stretched to twice its length, what is its new resistance?
Answer: 32 ohms
Explanation: Resistance is proportional to length squared when volume is conserved, so doubling length quadruples resistance. Option B is incorrect as resistance changes.