(14%) Problem 4: A loop of wire with radius r =0.025 m is placed in a region of uniform magnetic field with magnitude B. As shown in the figure, the field direction is perpendicular to the plane of the loop. The magnitude of the magnetic field changes at a constant rate from B1 =0.35 T to B2 =8.5 T in time At =4.5 s. The resistance of the wire is R =16 9. A 13% Part (a) Enter an expression for the magnitude of the magnetic flux through the loop using the symbols in the palette below. Your expression must be valid at all times described in the problem statement. Grade Summary D = Deductions 0% Potential 100% ( 7 8 9 HOME Submissions HO 4 5 6 Attempts remaining: 50 (0% per attempt B B1 1 2 3 detailed view B2 e + 0 END r R NO BACKSPACE DEL CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback. A 13% Part (b) Enter an expression for the change in the magnitude of the magnetic flux through the loop using the symbols in the palette below. A 13% Part (c) Calculate the numerical value, in tesla squared meters, of the change in the magnitude of the flux. 4 13% Part (d) Enter an expression for the magnitude of the induced emf in the loop using the symbols in the palette. A 13% Part (e) Calculate, in volts, the numerical value of the magnitude of the emf. 13% Part (f) Enter an expression for the magnitude of the current induced in the loop using the symbols in the palette. 4 13% Part (g) Calculate the numerical value, in amperes, of the magnitude of the induced current. A 13% Part (h) If you are looking down at the loop from above, so that the magnetic field is directed towards you, what is the direction of the induced current