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- A magnetic field of strength 0.29 T is directed perpendicular to a plane circular loop of wire of radius 29 cm. Find the magnetic flux through the area enclosed by this loop.Can you help with subquestions 9a and 9b 9a. A very long solenoid with a circular cross section and radius r= 5.10 cm with n= 1.10E+4 turns/m has a magnetic energy density uB= 6.60 mJ/m3. What is the current in the solenoid? 9b. What is the total energy stored in the solenoid if its length is 0.620 meters? (Neglect end effects.) This is not and will not be gradedThe magnetic flux through the loop shown in the accompanying figure varies with time according to -3 Φm Poe at sin(wt), where Do 3.5 × 10-³ Tm², a = 3 s¹, and w = 120 rad/s. What are = B the direction and magnitude of the current through the 5-№ resistor at (a) t = 0; (b) t = 2.17 × 10-² S, and (c) t = 3.00 s? 04 = a. Current flows down b. Current Select an answer c. Current Select an answer Hints Review Section 13.2 Lenz's Law for Lenz's Law, an intuitive rule for determining the direction of induced current flow. For the given description of this problem (positive direction for magnetic field is defined as pointing out of page), what does positive dom/dt mean for direction of current flow in the loop? What does negative døm/dt mean? Take care in taking derivative of m(t) and review Section 13.1 for induced voltage if needed. ' 5.0 Ω O with 263.9 ✓ with ✓ with mA at t = 0. mA at t = 2.17 × 10-² S. mA at t = 3.00 s.