Physics Moving Charges and Magnetism

In Moving Charges and Magnetism, what is SI Unit of magnetic field?

According to chapter 4 physics class 12 Moving Charges and Magnetism, what are the types of magnetism?

Two long straight conductors carry currents $3A$ and $1A$ into the plane of paper. A circular path is imagined to enclose these currents. The value of $\oint \vec{B}.\overrightarrow{dl}$ is

A rectangular coil of wire of $500$ turns of area $10\times 5c{m}^2$ carries a current of $2A$ in a magnetic field of induction $2\times {10}^{-3}T$ . If the plane of the coil is parallel to the field. The torque on the coil is $\left(inNm\right)$  

A current 1 flows along the length of an infinitely long, straight and thin?walled pipe. Then:

Two long conductors, separated by a distance d carry current $I_1$ and $I_2$ in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its directions is reversed. The distance is also increased to 3 d. The new value of the force between them is

A neutral point is obtained at the Centre of a vertical circular coil carrying current. The angle between the plane of the coil and the magnetic meridian is

Two long straight conductors carry currents $3A$ and $1A$ into the plane of paper. A circular path is imagined to enclose these currents. The value of $\oint \vec{B}.\overrightarrow{dl}$ is

The magnetic induction at the centre O in the figure shown is:

 

A proton moving with velocity v along the axis approaches a circular current carrying loop as shown in figure. The magnitude of magnetic force on proton at this instant is