PHYS 1502Q Chapter Notes - Chapter 18: Time Constant, Rl Circuit, Solenoid
Document Summary
Induced emf can be used in electrical circuits. Inductor voltage d b = dt d(li) = l dt di dt. Tells how difficult it is to change the current through the device. A large inductance means it will very difficult to change the current quickly. Solenoid - and inductor that is a uniform cylindrical coil of wire, carrying current i, having n turns per unit length ( n = number of turns length. Magnetic field produced by the solenoid where the length is much larger than its radius: Binside = u and niform, directed along the axis. B d + a b b. Proportional to the square of the number of turns. Higher potential side is specified by the labeled direction of the positive current. Closing switch (outer loop with battery in circuit) Without the inductor, the current in the circuit would immediately attain. With the inductor, the current cannot go from 0 to v/r.
