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In my lab, I have a solenoid with length 150 mm composed of 1400 loops of copper wire. The diameter of the solenoid is 5 cm, and its resistance is 2.6 ohms. I also have a ring of steel wire composed of 2 loops (like a keychain ring), each with diameter 2 cm and total resistance 0.12 ohms The steel ring is placed inside the solenoid at its center. After this is done, at one moment in time, the solenoid has a current of 1.0 A flowing through it. The current through the solenoid increases linearly, so that one second later the solenoid has a current of 4.0 A flowing through it. For the questions below, write answers in appropriate SI units. What are the initial and final magnetic field strengths (Bsol i and Bsol) at the center of the solenoid?
Sagot :
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