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CBSE Questions

Total Questions 9982
What is meant by rating of a fuse? Why should a fuse of proper rating be used ?
State two factors on which the strength of induced current depends ?
What is meant by magnetic effect of current ?
What is the function of commutator rings in the electric motor ?
List the factors affecting the strength of an electromagnet ?
When is the maximum force exerted on a current carrying conductor while it is kept in a magnetic field ?
How can the direction of force on a current -carrying conductor ,kept in a magnetic field ,be changed ?
What is a solenoid ?
What is the function of a galvanometer ?
Give some differences between electric motor and generator ?
Give some advantages of electromagnets over permanent magnets ?
What are direct and alternating currents ?
Distinguish between the terms ‘overloading’ and ‘short-circuiting’ as used in domestic circuits ?
Give some uses of electromagnets ?
What is electromagnetic induction ?
What are the characteristics of a political party ?
What is a political party ?
Suggest some reforms to strengthen parties so that they perform their functions well ?
What are the various challenges faced by political parties ?
State the various functions perform by political parties in a democracy ?