What is the maximum value of the magnetic field at a distance of 2.5 m from a light bulb that radiates 100 w of single-frequency sinusoidal electromagnetic waves uniformly in all directions? (ε0 = 8.85 × 10-12 c2/n ∙

T

Explanation:

 = Power of the bulb = 100 W

 = distance from the bulb = 2.5 m

= Intensity of light at the location

Intensity of the light at the location is given as

= 1.28 W/m²

= maximum magnetic field

Intensity is given as

T

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

choosing tennis and golf balls is your inde choice.

their mass and volume are dep