[ R' = 9 \times 20 \ \Omega = 180 \ \Omega ]
If the new length ( L' = 3L ) (three times original length), then to keep volume constant, the new area ( A' ) must satisfy:
Original resistance: [ R = \rho \frac{L}{A} = 20 \ \Omega ]
[ \boxed{180 \ \Omega} ] If you have a specific NCERT chapter, class, and subject (e.g., Class 10 Science Ch 12 Electricity, or Class 12 Physics Ch 1 Electric Charges), I can create a complete, accurate, and original set of solutions for all the exercises. Just tell me the details.
[ R' = 9 \times 20 \ \Omega = 180 \ \Omega ]
If the new length ( L' = 3L ) (three times original length), then to keep volume constant, the new area ( A' ) must satisfy:
Original resistance: [ R = \rho \frac{L}{A} = 20 \ \Omega ]
[ \boxed{180 \ \Omega} ] If you have a specific NCERT chapter, class, and subject (e.g., Class 10 Science Ch 12 Electricity, or Class 12 Physics Ch 1 Electric Charges), I can create a complete, accurate, and original set of solutions for all the exercises. Just tell me the details.