Moving Charges ...

A proton enters a magnetic field of flux density 1.5 T velocity of $$20 \times 10^2 ms ^{-1}$$ at an angle of $$30 ^\circ$$ with the field. The force on the position is $$[e_p = 1.6 \times 10^{-19} C]$$

When a charged particle enters in a uniform magnetic field, then its kinetic energy 

Two parallel wires on of length $$1\ m$$ and other is infinitive, are lying at a distance of $$2m$$. If the current flowing in each wire is $$1$$ ampere then the force between them will be-

A particle of mass 0.5 gm and charge $$2.5\times  10^{-8} C$$ is moving with velocity $$6\times 10^4 m/s$$. What should be the minimum value of magnetic field acting on it, so that the particle is able to move in a straight line ? $$ (g=9.8 m/sec^2)$$

The maximum energy of a deuteron coming out a cyclotron is $$20\ MeV$$. The maximum energy of proton that can be obtained from this accelerator is:

Which of the following particles will have  minimum frequency of revolution when projected with the same velocity perpendicular to a magnetic field?

Two conducting coils are placed co-axially now a cell is connected in one coil then they will :-

A particle of mass m, charge $$q$$ and kinetic energy $$t$$ enters a transverse uniform magnetic field of induction B. After 3 s, the kinetic energy of the particle will be

Two parallel wires in free space are $$10\ cm$$ apart and each carries a current of $$10A$$ in the same direction. The force exerted by one wire on other per metre of length of the wire is

$${\vec B_1},{\vec B_2}$$ and $${\vec B_3}$$ are the magnetic field due to $$I_1 , I_2$$ and $$I_3$$. Ampere's circuital law is given by $$\oint {\vec B} .d\vec l = {\mu _0}I$$, here $$\vec B$$ is_____.