To read the magnetic strip on an ID or credit card, you must swipe it quickly past a tiny coil of wire. Why must the card be moving for the coil system to read it

#See solution for details

Explanation:

--The coil needs current for it to be able to read the strip.

-On a moving magnet or changing magnetic field will provide the electric field required to push induce the current needed.

-A moving magnet will induce a current in the coil so that the magnetic strip can be read.

true

explanation:

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.