Moving Charges ...

The force between two parallel conductors, each of length $$50\ cm$$ and distant $$20\ cm$$ apart is $$100$$ N. If the current in one conductor is double that in another one then the values will respectively be(Given $$\mu_0=4\pi\times 10^{-7}$$)

The force per unit length between two long straight conductors carrying currents 3 A each in the same direction and separated by a distance of 2.0 cm is :

A proton, a deuteron and an $$\alpha $$ particle are accelerated through same potential difference and then they enter in a normal uniform magnetic field, the ratio of their kinetic energies will be:

Two long straight wires of length $$l$$ lie parallel to one another and carry currents opposite to one another of magnitudes $$i_{1}$$ and $$i_{2}$$ respectively. The force experienced by each of the straight wires is ( r is the distance of their separation)

Two long parallel copper wires carry currents of $$5A$$ each in the opposite direction . If the wires are separated by a distance of $$0.5 m$$, then the force between the two wires is

A charged particle, moving at right angle to a uniform magnetic field, starts moving along a circular arc of radius of curvature $$r$$. In the field it now penetrates a layer of lead and loses $${\dfrac{3}{4} }^{th}$$ of it's initial kinetic energy. The radius of curvature of it's path now will be :

Two particles $$X$$ and $$Y$$ having equal charges, after being accelerated through the same potential differences, enter in a region of uniform magnetic field and describe circular paths of radii $$R_{1}$$ and $$R_{2}$$ respectively. The ratio of the mass of $$X$$ to that of $$Y$$ is :

A long horizontal rigidly supported wire carries a current $$i_{a}=96A$$. Directly above it and parallel to it at a distance, another wire of $$0.144N$$ weight per metre is carrying a current $$i_{b}=24A$$, in a direction same as the lower wire. If the weight of the second wire is balanced by the force due to magnetic repulsion, then its distance (in mm) from the lower wire is :

A proton of energy $$8eV$$ is moving in a circular path in a uniform magnetic field. The energy of an alpha particle moving in the same magnetic field and along the same path will be

A deutron of kinetic energy $$50 keV$$ is describing a circular orbit of radius $$0.5 m$$ in a plane perpendicular to magnetic field $$\vec{B}$$ . The kinetic energy of the proton that describes a circular orbit of radius $$0.5 m$$ in the same plane with the same $$\vec{B}$$ is :