Moving Charges ...

A wire of length $$1m$$ is moving at a speed of $$2m{ s }^{ -1 }$$ perpendicular to its length in a homogeneous magnetic field of $$0.5T$$. If the ends of the wire are joined to a circuit of resistance the $$6 \Omega $$, then the rate at which work is being done to keep the wire moving at constant speed is

The force $$F$$ acting on charge $$q$$ moving with velocity $$v$$ perpendicular to magnetic field $$B$$ is:

A particle with certain charge enters a region of constant, uniform and mutually orthogonal fields E and B with a velocity u perpendicular to both E and B and comes out without any change in magnitude or direction u. This means that

Which one of the following is not correct about Lorentz Force?

The net magnetic flux through any closed surface, kept in a magnetic field is

A particle with a specific charge s is fired with a speed v towards a wall at a distance d, perpendicular to the wall. What minimum magnetic field must exist in this region for the particle not to hit the wall?

In an inertial frame of reference, the magnetic force on a moving charged particle is $$\bar{F}$$. Its value in another internal frame of reference will be

$$r=\frac{mv}{qB}$$
Time spent in magnetic field
$$t=\frac{\pi m}{qB}$$

Imagine yourself to be swimming in the wire in the direction of the current and facing a magnetic needle, then the north pole of the needle is deflected towards your left hand. Which is this rule?

Two free parallel wires carrying currents in opposite directions.