Physics WebAssign Ch20 #8

For more Chapter 20 physics problems, see:

A square, single-turn wire loop = 1.00 cm on a side is placed inside a solenoid that has a circular cross section of radius r = 3.00 cm, as shown in the end view of the figure below. The solenoid is 21.0 cm long and wound with 90 turns of wire.

(a) If the current in the solenoid is 4.00 A, what is the magnetic flux through the square loop?
_____T · m2

(b) If the current in the solenoid is reduced to zero in 4.00 s, what is the magnitude of the average induced emf in the square loop?
_____V

[ameliasaidwhat]

SO helpful and the answers were correct, thanks!

[cynthiamessina]

How do you know that the angle between the Area vector and the magnetic field is 90?