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solenoid is initially carrying zero current, which increases at 3. An electromagnet is made of an iron core inside an ideal solenoid that is connected to a DC emf source. The solenoid has length 6.00 cm and consists of 1000 loops of radius r₂ 1.50 cm. The F2 a constant rate until the current is 3.00 A after 2.00 seconds. The iron.core inside the solenoid increases the magnetic field produced by the solenoid by a factor of 1500. Around 2.50 cm. The aluminum ring has a rectangular cross-section the solenoid, there is an aluminum ring with outer radius r with area 7.20 x 10 m² and is at a temperature of -30.0°C.. The central axis of the solenoid, iron core, and the aluminum ring are all aligned with the x-axis. 0 (This answer is 1500X larger than if the solenoid was empty.) a) Calculate the magnitude of the final (when current is 3.00 A) magnetic field inside the iron core. b) Calculate the magnitude of the final magnetic flux through the ring. c) Calculate the magnitude of the induced emf in the ring. d) Calculate the resistance of the ring (Hint: length of "wire" circumference). e) Find the direction and magnitude of the induced current in the ring. Direction, as viewed from the left: Magnitude: