Methods of producing induced emf

In 1831 who discovered electromagnetic induction?

• Thomas Edison
• Nikola Tesla
• Michael Faraday

Passing a current through a solenoid will produce

• a magnetic field
• an electric field
• a current field
• nothing is produced

The production of electric current by a changing magnetic field is called ____________________________________.

• induced current

• electromotive force

• electromagnetic induction

• internal resistance

In Fleming's Right Hand Rule, First finger and center finger represent

• current, magnetic field

• magnetic field, current

• force, current

• magnetic field, force

Faraday’s Law states that the magnitude of the induced e.m.f. is _________________ to the rate of change of magnetic flux linkage with the solenoid.

• equal

• inversely proportional

• directly proportional

No EMF is induced when?

• When the wire is not moving

• When the wire is parallel to magnetic field direction

• When no lines are cut by the wire

• all of the above

A conducting bar of length L is sliding with a constant velocity V along two conducting rails in the presence of a uniform magnetic field directed into the page. According to Faraday’s law, the emf induced across the ends of the bar is due to

• The resistance of the circuit

• The change in magnetic field strength

• The change in the enclosed area in the magnetic field

• The change in the current

Summary of the given simulation

• Only motion of magnet induce emf

• Only Motion of coil induce emf

• Relative motion between coil and magnet induce emf

• without any movement between them we can get induce emf

Magnetic flux depends on

• Magnetic Field

• Area

• Angle between Magnetic Field and Area Vector

• All of the above

in a closed circuit, electric currents are induced so as to oppose the changing magnetic flux as per

• Law of conservation of mass

• Law of conservation of charge

• Law of conservation of energy

• Law of conservation of current