On increasing the current through a solenoid, the magnetic field produced by it at its centre.

When current is passed through a circular wire prepared from a conducting material, the magnetic field produced at its centre is B. Now a loop having two turns is prepared from the same wire and the same current is passed through it. The magnetic field at its centre will be :

A solenoid has 20 turns per cm. What is the value of the current that should be passed through the solenoid, to produce a magnetic field of 4 mT at its center?

A straight long solenoid produces magnetic induction Bat its centre. If it is cut into two equal parts and same number of turns wound on one part in double layer. Calculate magnetic field produced by new solenoid at its centre.

A circular segment of radius 20cm subtends an angle of 60^@ at its centre. Figure A current of 10A is flowing through it. Find the magnitude and direction of the magnetic field produced at the centre.

If a ferromagnetic material is inserted in a current carring solenoid, the magnetic field of solenoid

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. . a straight current carrying conductor I. The magnetic field produced by the solenoid is inversely proportional to the current II. The magnetic field produced by the solenoid is directly proportional to the current. III. The magnetic field produced by the solenoid is directly proportional to square of the current. IV. The magnetic field produced by the solenoid is independent of the current. Choose from the following which of the following would be the correct statement(s).

The magnetic field inside a toroidal solenoid of radius R is B. If the current through it is doubled and its radius is also doubled, keeping the number of turns same, the magnetic field produced by it will be