Awire carries 15 a. you form it into a singleturn circular loop with magnetic field 80 µt at the loop center. what is the loop radius?

Radius of the loop, r = 0.12 m

Explanation:

It is given that,

Current flowing in the wire, I = 15 A

Magnetic field at the center of the loop, B = 80 μT = 80 × 10⁻⁶ T

The magnetic field at the center of the circular loop is given by :

R is the radius of loop

r = 0.12 m

So, the radius of the loop is 0.12 m

Hence, this is the required solution.

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2