Consider a long coil of wire (a solenoid) in which a current flows.
PHYSICS · Multi-part · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
Consider a long coil of wire (a solenoid) in which a current flows.
(a) Sketch a diagram to show the magnetic field pattern produced by the current flowing in the solenoid.
(b) What would happen to the strength of the magnetic field if the coil
- i had more turns per metre length?
- ii carried a larger current?
- iii had a smaller cross-sectional area?
(c) State the equation for the magnetic flux density inside a solenoid of length l, with N turns, carrying a current I. Assume that there is only air inside the solenoid.