Question

plz note significant figures :) and units plz

Constants A 16-cm-diameter circular loop of wire is placed in a 1.38-T magnetic field. When the plane of the loop is perpendicular to the field lines, what is the magnetic flux through the loop? Express your answer to two significant figures and include the appropriate units. μΑ ? B = Value Units Submit Request Answer Part B The plane of the loop is rotated until it makes a 39° angle with the field lines. What is the angle in the equation B = BA cos for this situation? Express your answer using two significant figures. IVO AE ? 0 =

Answer 1

(A) Expression for magnetic flux: = BAcos e 16x10 m Here area, A=7 = = 2.01x107 m2 2 2 Angle between area vector and field vector is 0° Substitute the numerical values ®=(1.38T)(2.01x10^ m^) cos 0° = 2.77x10-2 Wb Round off the result to 2 significant digits 0= 2.8x102 Wb (B) If the plane of loop rotated 39° with field lines then the angle O in the equation is A = 90° – 39° = 51°