4. A coil is kept perpendicular to the page. At P, current flows into the page and at Q it comes out of the page as shown in fig-Q3. What is the direction of magnetic field due to the coil?(AS1)

1. The direction of current flowing in a coil is shown in fig-Q. What type of magnetic pole is formed at the face that has flow of current as shown in fig-Q? (AS1)

2. Why does the picture appear distorted when a bar magnet is brought close to the screen of a television? Explain (AS1)

3. Symbol ‘X’ in fig.Q3 indicates the direction of a magnetic field into the page. A straight long wire carrying current along its length is kept perpendicular to the magnetic field. What is the magnitude of force experienced by the wire? In what direction does it act? (AS1)

4.Explain the working of electric motor with a neat diagram. (AS1 )

5.Explain the working of AC electric generator with a neat diagram. (AS1 )

6.Explain the working of DC generator with a neat diagram. (AS1 )

7.How do you appreciate Faraday’s law, which is the consequence of conservation of energy?(AS6 )

8.The value of magnetic field induction which is uniform is 2T. What is the flux passing through a surface of area 1.5m2 perpendicular to the field? (AS1 )

9. An 8N force acts on a rectangular conductor 20cm long placed perpendicular to a magnetic field. Determine the magnetic field induction if the current in the conductor is 40A. (Ans: 1tesla) (AS1)

10. As shown in the fig-Q5, both coil and bar magnet moves in the same direction. What happens? (AS2)

11. Give a few applications of Faraday’s law of induction in daily life. (AS7)

12.Which of the various methods of current generation protects nature well? Give examples to support your answer. (AS7)

1. Which of the following converts electrical energy into mechanical energy[ ]
a) motor       b) battery       c) generator       d) switch