Electromagnetic Induction

Uju Precious Ezeamama First three questions for Faraday’s law 1. Faraday’s law states that an electric field is induced in any system in which a magnetic

field is changing with time. 2. The first experiment is done by wrapping pieces of wire around opposite sides of a piece

of soft iron with on piece of wire wrapped around a compass and the other piece connected to switch at one end and a battery at the other end. The significance of this experiment is to show that changes in a magnetic field could induce an electromotive force and current in a nearby circuit, which is called electromagnetic induction. The second experiment is done by creating a coil and connecting it to a voltmeter. A magnet is moved through the coil repeatedly to see the movement on the voltmeter. The significance of this experiment is to show that a moving magnetic field is necessary in order for electromagnetic induction to occur. 3. The voltmeter reads zero when the magnet stops moving. This is because a moving

magnetic field is needed to for electromagnetic induction to occur.