In a long uniform coil of inductance 2L and associated resistance 2R ohms is physically cut in to two exact halves which are rewound in parallel. The resistance and inductance of the combination are
- A. R and L
- B. 2R and 2L
- C. R/2 and L/2
- D. R/4 and L/4
Answer: C. R/2 and L/2
Explanation: Cutting a uniform coil of (2L, 2R) into two equal halves gives each half turns N/2 and length l/2, so each has L' = L and R' = R. Connecting them in parallel gives Leq = L/2 and Req = R/2.