2. The magnetic field inside a 4.0 cm diameter superconducting solenoid varies sinusoidally between 8.0 T and 12.0 T at a frequency of 10 Hz. a. What is the maximum electric field strength at a point 1.5 cm from the solenoid axis?

The maximum electric field strength is  

Explanation:

Substitute 4.0 cm for D

r = D / 2

r = 4 / 2 = 2cm

= 2 × 10⁻²m

Now, according to the question, the expression for the magnetic field is as follows:

B = 10T + 2T sin(2π(10Hz) t )

Now, calculate

Therefore, the electric field expression is as follows:

Substitute 0 for t in the above equation

Now substitute 1.5 cm for r in the above equation

The maximum electric field strength is  

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.