Advertisements
Advertisements
प्रश्न
State two factors on which the strength of induced e. m.f. depends.
Advertisements
उत्तर
(i) The time of change of magnetic flux, (ii) The strength of magnetic field.
संबंधित प्रश्न
State two ways of magnetising an iron piece?
You are given an iron nail, a torch cell, and a long piece of insulated copper wire. With the help of a labelled neat diagram, describe in steps how you will make the nail, an electromagnet.
State three uses of an electromagnet?
Name the material used for making the armature of an electric bell. Give a reason for your answer.
principle of an electric motor ?
Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.
Electric bell ______.
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 a soft iron core is inserted inside solenoid?
What energy conversion takes place during the working of a d c motor?
State and explain Maxwell’s Cork Screw Rule.
