Question

1. An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner’s 2.00 T field with his fingers pointing in the direction of the field.

Find the average emf induced in his wedding ring in mV, given its diameter is 2.05 cm and assuming it takes 0.325 s to move it into the field.

2. An emf is induced by rotating a 1000 turn, 25 cm diameter coil in the Earth’s 5.00 × 10-5 T magnetic field.

Randomized Variables
d = 25 cm

What average emf is induced, given the plane of the coil is originally perpendicular to the Earth’s field and is rotated to be parallel to the field in 11 ms?

3. Consider a generator that rotates its 200 turn, 0.11 m diameter coil at 3300 rpm in a 0.75 T field.

Randomized Variables
d = 0.11 m
f = 3300 rpm
B = 0.75 T

Calculate the peak voltage of the generator.

Answer 1

Comment

1) The induced emf is the wedding ring was found to be 2.03mV