BB N S Induced Current N REPEL!! must There must be an Electric Field in the metal that is pushing the current!!
You said that there is a conducting loop. You said that there is therefore a current induced around the loop if the flux through the loop changes. But the beginning and end point of the loop are the same so how can there be a voltage difference around the loop? Or a current??? ‘tis a puzzlement!
Electric fields that are created by static charges must start on a (+) charge and end on a (–) charge as I said previously. Electric Fields created by changing magnetic fields (NON-Coulombic) can actually be shaped in loops.
Because you said that an emf is a voltage so if I put a voltmeter from one point on the loop around to the same point, I will get ZERO volts, won’t I? How can there be a current??
That’s Strange ….. These two coils are perpendicular to each other
All Involve Changing The Magnetic Flux through the Loops
Remember the Definition of TOTAL ELECTRIC FLUX through a CLOSED surface:
Magnetic Flux Applies to an OPEN SURFACE only. “Quantity” of magnetism that goes through a surface. surface
In the figure below a 120-turn coil of radius 1.8 cm and resistance 6.8 is coaxial with a solenoid with 209 turns/cm and diameter 3.2 cm. The solenoid current drops from 1.5 A to zero in time interval Δ t = 25 ms. What current is induced in the coil during Δ t? 0.0224 A