If a current-carrying wire is in a magnetic field, in what direction will a force be exerted on the wire?
a. perpendicular to the magnetic field and parallel to the current direction
b. parallel to both the current direction and the magnetic field
c. perpendicular to the current direction and parallel to the magnetic field
d. perpendicular to both the magnetic field and the current direction

Answer : Perpendicular to both the magnetic field and the current direction

Explanation :

If a current-carrying wire is in a magnetic field, the magnetic force exerted on the wire is given by :

.............(1)

Where

q is the electric charge

v is the velocity with which the particle is moving

B is the magnetic field

The direction of magnetic force is can be find by using right hand rule.

From equation (1), it is clear that the direction of force exerted on the wire is perpendicular to both the magnetic field and the direction of current.

Hence, the correct option is (d).

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it