(a) aircraft sometimes acquire small static charges. suppose a supersonic jet has a 0.500 - μc charge and flies due west at a speed of 660 m/s over the earth’s south magnetic pole, where the 8.00 10 -t 5  magnetic field points straight up. what are the direction and the magnitude of the magnetic force on the plane? (b) discuss whether the value obtained in part (a) implies this is a significant or negligible effect.

(a) north

We can treat the aircraft as a single point charge moving in a magnetic field. In this case, the magnetic force exerted on the plane is

where

is the charge on the plane

v = 660 m/s is the velocity

is the magnitude of the magnetic field

is the angle between the direction of motion of the jet and of the magnetic field

Substituting,

The direction can be found by using Fleming's left hand rule. We have:

- index finger: magnetic field direction (straight up)

- middle finger: velocity of the plane (due west)

- force: thumb --> north

(b) Not negligible

As we can see from part (a), the magnitude of the force is not really big, so the effects are negligible.

For instance, we can compare this force with the weight of a plane. If we take a Boeing 737, its mass is about 80,000 kg, so its weight is

As we can see, this is several orders of magnitude bigger than the magnetic force calculated at point (a), so the effects of the magnetic force are negligible.

2b2t

explanation:

2b2t

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia