Question Part Points Submissions Used An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.50 T field with his fingers pointing in the direction of the field. His wedding ring has a diameter of 2.19 cm, and it takes 0.330 s to move it into the field. (a) What average current is induced in the ring if its resistance is 0.0100 Ω? (Enter the magnitude in amperes.) A (b) What average power is dissipated (in W)? W (c) What average magnetic field is induced at the center of the ring? (Enter the magnitude in teslas.) T (d) What is the direction of this induced magnetic field relative to the MRI's field? parallel antiparallel The magnitude is zero.
Given,
B1 = 0 ; B2 = 2.5 T ; d = 2.19 cm ; t = 0.33 s
r = 2.19/2 = 1.095 cm
a)R = 0.01 Ohm
because of the change in B field there will be a change of magentic flux and an emf will be induced
emf = -d(phi)/dt
emf = A (B2 - B1)/t
emf = 3.14 x 0.01095^2 (2.5 - 0)/0.33 = 0.0029 V
from Ohm's law, V = IR
I = V/R = emf/R
I = 0.0029/0.01 = 0.29 A
Hence, I = 0.29 A
b)P = I^2 R
P = 0.29^2 x 0.01 = 0.0008 W
Hence, P = 0.0008 W
c)B = u0 I/2 R
B = 4 pi x 10^-7 x 0.29/(2 x 0.01095) = 1.66 x 10^-5 T
Hence, B = 1.66 x 10^-5 T
d)Out of the page
Question Part Points Submissions Used An MRI technician moves his hand from a region of very...
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. His wedding ring has a diameter of 2.35 cm and it takes 0.475 s to move it into the field a. What average current is induced in the ring in A if its resistance is 0.0100 Ω? b. What average power is dissipated in mW? c. What magnetic...
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. (a) Find the average emf induced in his wedding ring, given its diameter is 2.38 cm and assuming it takes 0.275 s to move it into the field. (Enter the magnitude only.) _____________________ mV (b) If the resistance of the ring is 1.00 mΩ, how much heat will...
An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scammer's 2.00 T field with his fingers pointing in the direction of the field. His wedding ring has a diameter of 2.05 cm and it takes 0.35 s to move it into the field. Randomized Variables d=2.05 cm t=0.35s Part (a) What average current is induced in the ring in A if its resistance is 0.0100 Ω? Part (b) What average power is dissipated in mW? Part...
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. His wedding ring has a diameter of 2.05 cm and it takes 0.375 s to move it into the field. Randomized Variables d=2.05 cmt= 0.375 s ?Part (a) What average current is induced in the ring in A if its resistance is 0.0100Ω.Part (b) What average power is dissipated in...
I cannot figure out this one. can someone help? (10%) Problem 7: 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. His wedding ring has a diameter of 2.35 cm and it takes 0.475 s to move it into the field. Randomized Variables d=2.35 cm t = 0.475 s 33% Part (a) What average current is induced...
A technician wearing a circular metal band on his wrist moves his hand (from a region where the magnetic field is zero) into a uniform magnetic field of magnitude 1.8 T in a time of 0.20 s. If the diameter of the band is 7.0 cm and the field is at an angle of 45° with the plane of the metal band while the hand is in the field, find the magnitude of the average emf induced in the band....
A technician wearing a circular metal band on his wrist moves his hand into a uniform magnetic field of magnitude 3.5 T in a time of 0.14 s. If the diameter of the band is 3.5 cm and the field is at an angle of 30° with the plane of the metal band while the hand is in the field, find the magnitude of the average emf induced in the band. .0074V .0833V 2.083V .0208V
of an electromagnetic wave propagating in a vacuum is 65 x 10 Hz. See the table for problem 1 1) To what part of the electromagnetic spectrum does this wave a) blue light 2) The electromag a)perpendicular to b) parallel to the the magnetic field b) green light netic field of the electromagnetic wave is d) violet light c) antiparallel to the d) paralel to the wave velocity magnetic field magnetic field The speed of light in a medium is...