Windermere

Which of the following choices is the SI unit for magnetic flux?

• Gauss (G)

• Tesla (T)

• Weber (Wb)

• Lumen (L)

The direction of induced e.m.f can be found by

• Laplac's law

• Lenz's law

• Fleming's right hand rule

• Kirchhoff’s voltage law

Complete the following statement: Faraday’s law indicates that a changing magnetic field produces

• an electric field

• an induced magnetic field

• a force field

• light

Which of the following is NOT an application of electromagnetic induction?

• Generating electricity

• Energy efficient cookers and burners

• Energy efficient motors

• Using a magnet to separate scrap metal parts

In a circuit containing an e.m.f, a resistor, and an inductor, where is the magnetic potential energy stored?

• in the inductance of the inductor

• in the resistor

• in the magnetic field

• in the magnetic flux

Thrust a magnet into a coil of wire. While the magnet is being moved toward the coil

• Becomes an electromagnet

• Has a current in it

• Both of these

• Neither of these

In the given figure current from A to B in the straight wire is decreasing. The direction of induced current in the loop is

• clockwise

• anticlockwise

• changing

• nothing can be said

A conductor carries 125 amperes of current under 60^o to a magnetic field of 1,1 Tesla. The force on the conductor will be nearly

• 50 N

• 120 N

• 240 N

• 480 N

Which one of the following actions will not result in an induced current?

• Drop a magnet through a closed metal ring

• Move a metal loop away from a current carrying wire

• Drop an iron sheet through a region with a constant magnetic field

• Hold a copper loop next to a current carrying wire

An ammeter is connected to a coil of wire. A magnet is sitting motionless next to the wire such that its south end is near the coil and perpendicular to the plane of the coil as shown. The meter indicates that a current is flowing through the wire from the left toward the right. What, if anything, is wrong with this picture?

• The current should be flowing from the right toward the left

• The needle should be slanted toward the right

• The needle should indicate that there is no current flowing

• There is nothing wrong with the picture