Moving Charges ...

Assertion : If an electron is not deflected while passing through a certain region of space, then only possibility is that there is no magnetic region.
Reason : Force is directly proportional to the magnetic field applied.

A proton (or charged particular) moving with velocity $$v$$ is acted upon by electric field $$E$$ and magnetic field $$B$$. The proton will move undeflected if

The pole piece of the magnet used in a pivoted coil galvanometer are

Which of the following statement is true.

A proton and an electron both moving with the same velocity $$v$$ enter into a region of magnetic field directed perpendicular to the velocity of the particles. They will now move in circular orbits such that

If a proton, deutron and $$\alpha-$$particle or being accelerated by the same potential difference enters perpendicular to the magnetic field, then the ratio of their kinetic energy is

Two parallel conductors $$A$$ and $$B$$ equal length carry currents $$I$$ and $$10\ I$$, respectively, in the same direction. Then

If a particle of charge $$10^{-12}$$ coulomb moving along the $$\hat x-$$direction with a velocity $$10^5 m/s$$ experiences a force of $$10^{-10}$$ newton in $$\hat y-$$direction due to magnitude field, then the minimum magnitude field is

A long wire $$A$$ carries current of $$10\ amp$$. Another long wire $$B$$. Which is parallel to $$A$$ and separated by $$0.1\ m$$ from $$A$$, carries a current of $$5\ amp$$, in the opposite direction to that in $$A$$. What is the magnitude and nature of the force experiment per unit length of $$B$$ $$(\mu_0=4 \pi \times 10^{-7}\ weber/amp-m)$$

A straight conductor carries a current of $$5\ A$$ An electron travelling with a $$10^6 ms^{-1}$$ parallel to the wire at a distance of $$0.1\ m$$ from the conductor, experience a force of