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The inductance of a solenoid with 450 turns and a length
Chapter 23, Problem 49P(choose chapter or problem)
Problem 49P
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?
Questions & Answers
QUESTION:
Problem 49P
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?
ANSWER:
Step 1 of 3
Here, we have to calculate the cross sectional area and induced emf in the coil.
The inductance of a coil,
-----------------------------(1)
Where, - Permeability of free space
- Number of turns of the coil
- Length of the coil
- Area of the coil
The change in magnetic flux, ----------(2)
Where, - Change in current
The equation for the induced emf is, --------(3)
Where, - Change in time
a)