Question

A physician is using a device with a thin circular coil of current-carrying wire of radius 3.30 cm to stimulate neurons in a patient's brain. The coil is placed directly against the patient's skull, and everywhere within the area of the coil, the magnetic field changes at a rate of 1.10 X 104 T/s. (a) What is the magnitude of the emf (in V) induced around the circumference of this circular area in the brain? (Assume the magnetic field is perpendicular to this circular area in the brain.) V (b) What magnitude of electric field (in V/m) is induced on the circumference of this circular area? V/m

Answer 1

given R = 3.3cm R = 3.3x10²m dB = 1.4 x 104 T/sec dt iel Emf induced E= do dt E = d (BA) dt E = A dB dt 2. at E=TR .dB € = 11 (3.3x162;? (1-1x104] &= 37.6 V (Answee] using Principle E = E. 27 R = induced electric field 37.6 21[3.3) (0) b Emf induced E - Electric field 2 TIR E- 181.5 NE [Answer).