The explanation for option C: The induced emf in a coil is given by ε = - N d ϕ d t where is the number of turns, d ϕ d t is a change in flux in a certain time interval. The negative sign indicates that the emf induced in the coil acts to oppose any change in the magnetic flux.
Induced emf in a stationary coil in a changing magnetic field
answer : 1]The magnetic flux is a measure of the number of magnetic field lines passing through an area.
2]If the magnetic flux through a coil is changed, a voltage will be produced. This voltage is known as the induced emf.
3]If a loop of wire with an area A is in a magnetic field B, the magnetic flux is given as where is a magnetic field, is an area of the coil and is the angle between and .
4]Induced emf is directly proportional to the area of the coil.
Answers & Comments
Explanation:
The explanation for option C: The induced emf in a coil is given by ε = - N d ϕ d t where is the number of turns, d ϕ d t is a change in flux in a certain time interval. The negative sign indicates that the emf induced in the coil acts to oppose any change in the magnetic flux.
Induced emf in a stationary coil in a changing magnetic field
answer : 1]The magnetic flux is a measure of the number of magnetic field lines passing through an area.
2]If the magnetic flux through a coil is changed, a voltage will be produced. This voltage is known as the induced emf.
3]If a loop of wire with an area A is in a magnetic field B, the magnetic flux is given as where is a magnetic field, is an area of the coil and is the angle between and .
4]Induced emf is directly proportional to the area of the coil.
i hope it would help you