10th science physics Formative Assessment MAGNETIC EFFECTS OF ELECTRIC CURRENT

Q. PAPER II  MARKS-30 TIME- 70 MINUTES

Instructions:

Questions : 1 to 5 – 1 Mark each              Questions : 6 to 9 – 2 Marks each

Questions : 10 to 13 – 3 Marks each        Question 14 – 5 Marks

1. State two uses of electromagnet.

2. An electron moving along X – axis in a magnetic field along Y – axis. In which direction will the electron deflected.

3. State Fleming’s left hand rule.

4. What is the importance of earth wire?

5. Should a copper wire be used as a fuse wire? If not, why?

6. Give two points of difference between and electromagnet and permanent magnet.

7. Draw the lines of force indicating field direction of the magnetic field through and around

i) Single loop of wire carrying electric current.  ii) A solenoid carrying electric current.

8. What id magnetic field? How is the direction of magnetic field at a point determined?

9. Give four features of domestic electric wiring.

10. Draw a schematic diagram of domestic wiring system and write its main features.

11. Match the following:

                 A                                                                    B

i) Right hand thumb rule                       a) Force on a conductor in a magnetic  field

ii) Fleming’s left hand rule                    b) Direction of magnetic field of straight conductor

iii) Fleming’s right hand rule                 c) Direction of induced current in conductor

                                                              d) Polarity of any end of a solenoid.

12. a) Draw a labelled diagram to show how electro – magnet is made.

b) What is the purpose of soft iron core in making electromagnet?

13. Write two differences between AC and DC current and draw diagram also.

14. a) Write principle of electric generator.

b) Explain construction and working of generator.

c) Draw labelled diagram of electric generator.
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