A loop is pulled with a force F to the right to maintain a constant speed of 8.0 m/s. The loop has a length of 0.15m, a width of 0.08m, and a resistance of 200.0. The magnitude of the field Is 1.2T. (a) what is the magnitude of the emf induced in the loop? (b) what is the induced current in the loop? (c) determine the magnitude of the force F requires to pull the loop.

Explanation:

The emf induced in a straight conductor of length l moving with velocity v perpendicular to a magnetic field B is

E = Blv

where B, l and v are perpendicular. The emf, E is in volts

Magnetic field, B is in webers/m2

= 1.2 T

length is in meters

= 0.15 m

velocity, v is in m/sec

= 8 m/s

E = 1.2 × 0.15 × 8

= 1.44 V

B.

Using ohm's law,

V = I × R

I = 1.44/200

= 0.0072 A

C.

F = B × I × L

= 1.2 × 0.0072 × 0.15

= 0.001296 N

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.