03 July 2014

X Science Questions From CBSE Examination Papers Ch: Magnetic Effect of currents

1. Q. What is solenoid? Draw the pattern 0f magnetic field line of a solenoid through which steady current flows
2 Marks
2. Q. What are permanent magnet and electromagnet? Give two use of each.
2 Marks
3. Q. Differentiate short circuit and over loading?
2 Marks
4. Q. Draw the pattern of magnetic field lines of produce by current carrying circular loop
2 Marks
5. Q. What is role of fuse in domestic circuit? Why we use the fuse of defined rating not be replaced by one with large rating?
2 Marks
6. Q. How will deflection of compass get affected if current in straight wire is increased? support your answer with reason?                                        
2 Marks
7. Q. No two field line intersect each other . Explain?                          
2 Marks
8. Q. What is the direction of thumb indicates in right hand thumb rule? In what way this rule is different from Fleming’s left hand rule?  
2 Marks
9. Q. Why does a current carrying conductor kept in a magnetic field experience force? On what factor does the direction of this force depend? Name and state the rule used determination of direction of current?
2 Marks
10. Q. Two circular coil A and B placed closed to each other If the current in coil A is changed, will some current be induced in the coil B? Give reason?
2 Marks
11. Q. What do you mean by term magnetic field line? List any two properties?
2 Marks
12. Q. Give an activity to show magnetic field produce by current carrying circular loop?
2 Marks
13. Q. What precautions should be taken to avoid the overloading of domestic circuit? 
2 Marks
14. Q. Why do we connect earth wire in house give two reason?
2 Marks
15.Q. Write four properties of magnetic field lines?
2 Marks

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