Advertisements
Advertisements
प्रश्न
State important properties (or characteristics) of magnetic lines of force around a straight conductor.
Advertisements
उत्तर
The main properties are:
(i) The magnetic lines of force are in the form of concentric circles around the conductor but as their distance from the conductor increases, the curvature of lines of force decreases.
(ii) The direction of the magnetic lines of force reverses if the direction of the flow of current in the conductor reverses.
(iii) With the increase of current in the conductor, the number of lines of force or the intensity of the magnetic field also increases.
संबंधित प्रश्न
State two differences between an electromagnet and a permanent magnet.
Describe briefly one way of producing an induced current in a coil. State one factor that determines the magnitude of induced e.m.f.
State the purpose of the iron core.
Why is soft iron generally used as the core of the electromagnet?
What energy conversion takes place during the working of a d c motor?
State the factors that can increase the speed of rotation of the coil in a D.C. motor.
State the position of armature coil relative to the direction of magnetic field, in a D. C. motor when the deflecting couple acting and the coil is minimum.
State and explain Maxwell’s Cork Screw Rule.
State the function of a split ring in D.C. motor.
Write the answer in your words.
How is an electromagnet made?
