What are the three ways in which voltage can be induced in a loop of wire?

1. Changing the magnetic field intensity

2. Changing the area enclosed by the loop

3. Changing the orientation of the loop of wire with respect to the magnetic field

Explanation:

Electromagnetic induction occurs when there is a variation of magnetic flux through a coil of wire: as a result, an emf (electromotive force) is induced in the coil, according to the equation

where

is the variation of magnetic flux through the coil

is the time elapsed

The magnetic flux through a coil of wire is given by:

where

B is the magnetic field intensity

A is the area enclosed by the coil

is the angle between the direction of B and the perpendicular to the area enclosed by the coil

As we can see, the magnetic flux depends on these three factors, so changing any of them will change the magnetic flux, and an electromotive force will be induced in the coil as a result.

iron would move it is magnetic there is a mag field around the current in the wire

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.