Physics Electromagnetic Induction

Question 1

What is Faraday’s First Law

Answer 1

In a closed coil,if Magnetic flux changes(If B,A or Theta changes),a potential difference is created, this potential difference is called EMF.

Question 2

What is the main setting of Faraday’s 1st law

Answer 2

Emf or potential difference is created only in a “CLOSED CIRCUIT”:)

Question 3

Faradays 1st law in terms of magnet

Answer 3

Whenever there is A RELATIVE MOTION BETWEEN A CLOSED COIL AND MAGNET,AN EMF IS INDUCED OR POTENTIAL DIFFERENCE IS CREATED AS number of field lines with magnet to the coil increases

Question 4

Till when does EMF LASTS

Answer 4

When the change in flux becomes 0

Question 5

What is Lenz Law

Answer 5

The direction of induced emf is always opposite to cause producing it like magnetic flux

Question 6

What if B is increasing, according to Lenz law what happens

Answer 6

A magnetic opposing the magnetic field increases

Question 7

What if in a closed circuit Area vector increases according to Lenz law

Answer 7

An induced current flows in a direction which creates a Magnetic field opposing the change in area in the direction opposite to change in area

Question 8

What is Ac generator

Answer 8

It is a machine which converts mechanical energy into electrical energy