A wire loop carrying a current l is placed in XY plane as shown below

The extremities M and N of the current loop subtends an angle `120^@` at the centre P of the circular part of the loop.
If a particle with charge +Q and mass m is placed at the centre P and given a velocity `oversetrarrv` along NP, find the instantaneous acceleration.

A circular loop of radius R is bent a long a diameter and given a shape as shown below. One of the semicircles (KNM) lies in XZ plane and the other one (KLM) lies in YZ plane with their centres at origin. Current l is flowing through each of the semicircles. A particle of charge q is released at the origin with a velocity oversetrarrV=-v_0uarr . Find the instantaneous force oversetrarrF on the particle. Assume the space is gravity free.

Magnetic field intensity H at the centre of a circular loop of radius r carrying current I e.m.u is

A current carrying circular loop of radius R is placed on the xy place with centre at the origin . Half of the loop with xgt0 is now bent so that it now lies on the yz plane .

Two long parallel wires carrying current 2.5 ampere and I ampere in the same direction (directed into the plane of the paper) are held at P and Q respectively, such that they are perpendicular to the plane of the paper. The point P and Q are located at a distance of 5 metres and 2 metres respectively from collinear point R as shown below. (i) an electron moving with velocity 4xx10^5m/s along positive X direction experiences a force of magnitude 3.2xx10^(-20)N at the point R. Find the value of I.

A rectangular loop of size lxxb carrying a steady current I is placed in a uniform magnetic field vec(B) . Prove that the torque vec(tau) acting on the loop is given by vec(tau)=vec(m)xxvec(B) , "when " vec(m) is the magnetic moment of the loop .

An electric current i enters and leaves a uniform circular wire of radius a through diametrically opposite points. A particle carrying a charge q moves along the axis of the circular wire with speed v. What is the magnetic force experienced by the particle when it passes through the centre of the circle ?

Two long parallel wires carrying current 2.5 ampere and 1 ampere in the same direction (directed into the plane of the paper) are held at P and Q respectively, such that they are perpendicular to the plane of the paper. The point P and Q are located at a distance of 5 metres and 2 metres respectively from collinear point R as shown below. (ii) Find all the positions at which a third long parallel wires carrying of magnitude 2.5 ampere may be placed, so that the magnetic induction at R be zero