Consider two situations:
1) Loop moves to right with speed |v|
2) Magnet moves to left with (same) speed |v|
What will the ammeter read in each case? (Assume that CCW current => positive ammeter reading)
Faraday found that EMF is proportional to the negative time rate of change of B. EMF is also the line integral of a force/charge. The force is fq in the expression:
E=∮fq⋅dl
That force is:
A stationary rectangular metal loop is in a region of uniform magnetic field B, which has magnitude B decreasing with time as B=B0−kt. What is the direction of the field induced B-field created by the induced current in the loop, in the plane region inside the loop?
A rectangular metal loop is moving thru a region of constant uniform magnetic field B, out of page, with constant speed v, as shown. Is there a non-zero emf around the loop?
A loop of wire is near a long straight wire which is carrying a large current I, which is decreasing. The loop and the straight wire are in the same plane and are positioned as shown. The current induced in the loop is: