49. ** The inductance of a solenoid with 450 turns and a length of 24 cm is 7.3 mH . (a) What is the cross-sectional area of the solenoid? (b) What is the induced emf in the solenoid if its current drops from 3.2 A to 0 in 55 ms ?
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24 \, \text{m} \) - Inductance, \( L = 7.3 \, \text{mH} = 7.3 \times 10^{-3} \, \text{H} \) Show more…
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The inductance of a solenoid with 450 turns and a length of 24 $\mathrm{cm}$ is 7.3 $\mathrm{mH}$ (a) What is the cross-sectional area of the solenoid? (b) What is the induced emf in the solenoid if its current drops from 3.2 A to 0 in 55 $\mathrm{ms}$?
Assume that the length of the solenoid is much larger than the solenoid's radius and that the core of the solenoid is air. Calculate the inductance of a uniformly wound solenoid having 300 turns if the length of the solenoid is 42 cm and its cross-sectional area is 3 cm^2. Answer in units of mH. Calculate the self-induced emf in the solenoid described in the first part if the current through it is decreasing at the rate of 56 A/s. Answer in units of mV.
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