Asolenoid with 33 turns per centimeter carries a current i. an electron moves within the solenoid in a circle that has a radius of 2.1 cm and is perpendicular to the axis of the solenoid. if the speed of the electron is 3.6 ✕ 105 m/s, what is i (in a)?

To develop this problem it is necessary to match the concepts related to electromagnetic force and the centripetal Force.

By definition we have that the centripetal Force is equivalent to

Where,

m = Mass (of a electron)

v = Velocity

R = Radius

At the same time we have that magnetic force is equal to

Where,

q = Charge

V = Velocity

B = Magnetic Field

Equating both we have,

Re-arrange to find B,

Replacing with our values we have,

Now for Faraday's law the Magnetic field in a solenoid is defined as,

Re-arrange to find I

Where,

B = Magnetic Field

Permeability constant

N = Number of loops per meter

Replacing with our values

Therefore the Current is 0.235115A

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.