[" For protecting a sensitive equipment from "],[" the external magnetic field,it should be "],[" (a) surrounded with fine copper sheet "],[" (b) placed inside an iron can "],[" (c) wrapped with insulation around it "],[" when passing current through it "],[" (d) placed inside an aluminium can "(1998)]

A sensitive magnetic instrument can be shielded very effectively from outside magnetic fields by placing it inside a box of

Assertion : Any instrument can be protected from external magnetic field by putting inside a wooden box. Reason : Iron is a magnetic substance.

A uniform magnetic field, parallel to the plane of the paper existed in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by

A small flat coil carrying current has magnetic moment mu . It is placed in an external magnetic field B . The maximum potential energy of the system can be

An iron rod of volume 10^(-4) m^(3) and relative permeability 900 is placed inside a long solenoid wound with 6 turns/cm. If a current of 0.4 A is passed through the solenoid, the magnetic moment of the rod is

A solenoid is a long helical coil of wire through which a current is run in order to create a magnetic field. The magnetic field of the solenoid is the superposition of the fields due to the current through each coil. It is nearly uniform inside the solenoid and close to zero outside and is similar to the field of a bar magnet having a north pole at one end and a south pole at the other depending upon the direction of current flow. The magnetic field produced in the solenoid is dependent on a few factors such as, the current in the coil, number of turns per unit length etc. The following graph is obtained by a researcher while doing an experiment to see the variation of the magnetic field with respect to the current in the solenoid. The unit of magnetic field as given in the graph attached is in milli-Tesla (mT) and the current is given in Ampere. What will happen if a soft iron bar is placed inside the solenoid?