Chapter 15 - Electromagnetic Induction - 4

Chapter 15 - Electromagnetic Induction - 4

1. The motional emf depends upon the :

a) the strength of conductor
b) All of the above
c) Speed of conductor
d) Length of conductor

2. A rod of unit length is moving at 30o through a 0.5 T magnetic field If velocity of rod is 1m/sec then the induced emf in the rod will be:

a) 0.25V
b) IV
c) 0.1V
d) 0.5V

3. The rate of change of magnetic flux is directly proportional to the induced emf in the statement of:

a) None
b) Lenz’s law
c) Fradays law
d) Oersted law

4. Lenz’s Law deals with the:

a) Both the direction and magnitude of emf
b) Direction of emf
c) Magnitude of emf
d) Direction of induced current

5. The direction of induced current in a certain coil can easily be found by using:

a) Newton’s third law
b) Right hand rule
c) Henry’s Law
d) Faraday’s Law

6. Lenz’s Law is in accordance with the:

a) Law of conservation of momentum
b) Faraday’s Law
c) Law of conservation of charge
d) Law of conservation of energy

7. The induced emf primarily produced at the cost of:

a) Internal energy
b) Electrical energy
c) Chemical energy
d) Mechanical energy

8. The phenomena in which a change of current in one coil induces an emf in another coil is called:

a) Electromagnetic Induction
b) Self induction
c) Electrification
d) Mutual induction

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