A wire carrying a current of 2.85 A has a straight segment of 2.35 m. Determine the magnitude of the magnetic field due to this segment of wire at a point P which is at the midpoint of the straight segment of wire and a distance of 0.275 m perpendicular to the wire.

Explanation:

We are given that

Current,I=2.85 A

Length of segment=l=2.35 m

d=0.275 m

We have to find the magnitude of magnetic field due to this segment of wire at a point P which is at midpoint of the straight wire.

Magnetic field,B=

Where

Using the formula

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.