Two tightly wound solenoids have the same length and circular cross-sectional area, but the wire of solenoid 1 is half as thick as solenoid 2. The ratio of their inductances is
A. \(\frac{1}{4}\)
B. \(\frac{1}{2}\)
C. 2
D. 4
Answer:D
Two tightly wound solenoids have the same length and circular cross-sectional area, but the wire of solenoid 1 is half as thick as solenoid 2. The ratio of their inductances is
A. \(\frac{1}{4}\) B. \(\frac{1}{2}\) C. 2 D. 4