What are the advantagges of using soft iron as a core, instead of steel, in the coils of galvanometers?

A tightly-wound, long solenoid having 50 turns cm^(-1) , carris a current of 4.00 A . Find the magnetic intensity H and the magnetic field B at the centre of the solenoid. What will be the values of these quantities if an iron core is inserted in the solenoid and the magnetization I in the core is 4.00 xx 10^6 A m^(-1) ?

Soft iron is used in many parts of electrical machines for

If Mendel had studied the 7 traits using a plant with 12 chromosomes instead of 14, in what way would the interpretation have been different ?

If two coil are wound on a soft iron core the mutual induction is

Why the Phoshor - bronze wire is used as the suspension wire in moving coil galvanometer ?

Kumar is going to build a house. To purchase the iron rods required for construction, he visited an Iron & steel shop nearby. The seller showed him some Iron rods which are fresh and good. He also showed him little older Iron rods which are brownish in appearance. The price of fresh rods are costlier than the older ones, the seller also gave some offer to older ones. Kumar's friend Ramesh advised him not to buy the cheaper rods. (c) What are the values shown by Ramesh?

Answer the following questions a. Explain qualitatively on the basis of domain picture the irreversibility in the magnetisation curve of a ferromagnet. b. The hysteresis loop of soft iron piece has a much smaller area than that of a carbon steel piece. If the material is to go through repeated cycles of magnetisation , which piece will dissipate greater heat energy ? c. 'A system displaying a hysteresis loop such as a ferromagnet , is a device for storing memory ? ' Explain the meaning of this statement. d. What kind of ferromagnetic material is used for coating magnetic tapes in a cassette player , or for building ' memory stores ' in a modern computer ? e. A certain region of space is to be shielded from magnetic fields . Suggest a method.

The coefficient of thermal conductivity of copper is nine times that of steel. One end of copper is maintained at 100°C and the other end of steel is maintained at 0°C. If the corresponding lengths of the copper and iron are 18cm and 6cm respectively, What will be the temperature at the junction of copper and steel ?