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प्रश्न
Name the material used for making the armature of an electric bell. Give a reason for your answer.
What material is used for making the armature of an electric bell? Give a reason for using this material.
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उत्तर
The material used for making the armature of an electric bell is soft iron, which can induce magnetism rapidly.
संबंधित प्रश्न
Name two factors on which the strength of magnetic field of an electromagnet depends and state how does it depend on the factors stated by you.
principle of an electric motor ?
Name the material of core in (a) an electric bell, (b) electromagnet, (c) a d.c. motor, (d) an a.c. generator and (e) a transformer.
State two factors on which the magnitude of an induced e.m.f. in the secondary coils of a transformer depends.
Answer the following in short.
Name a few common appliances that use electromagnets.
How does a magnetic field set up by a solenoid change when number of turns are increased?
How does a magnetic field set up by a solenoid change when a soft iron core is inserted inside solenoid?
What will be the effect on the working of an electric bell if instead of a direct current an alternating current is used?
What energy conversion takes place during the working of a d c motor?
State the factors, on which depends the magnitude of the force acting on current carrying conductor, when it is kept in a magnetic field perpendicular to it.
