Advertisements
Advertisements
प्रश्न
What are the factors that govern the magnitude of force acting on a current carrying conductor which is freely suspended in a magnetic field?
Advertisements
उत्तर
The magnitude of force acting on a current carrying conductor placed in a magnetic field depends on the following factors:
(i) The force F is directly proportional to the strength of the current flowing in the conductor,
i.e., F ∝ i.
(ii) The force F is directly proportional to the strength of the magnetic field, i.e., F ∝ B; and
(iii) The force F is directly proportional to the length of the conductor, i.e., F ∝ l.
संबंधित प्रश्न
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.
Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the 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.
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.
The magnetic flux through a coil having 100 turns decreases from 5 milli weber to zero in 5 second. Calculate the e.m.f. induced in the coil.
State two factors on which the strength of induced e. m.f. depends.
How does a magnetic field set up by a solenoid change when a soft iron core is inserted inside solenoid?
State the position of armature coil relative to the direction of magnetic field, in a D. C. motor when the deflecting couple acting an the coil is maximum.
