A densly wound cylindrical coil has 210 turns per meter, a 5 cm radius, and carries 38 mA. What is the magnitude of the uniform
magnetic field it creates inside the coil in μT? Now a straight wire is inserted into the coil that carries 500 mA. It travels down the central axis of the coil (meaning the center of the circular cross section of the coil). What is the magnitude of the total magnetic field created half way between the straight wire and the inner coil walls in μT? Hint: think about each magnetic field's direction.
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The expected measurements should range as follows: 5, 10, 15, 20, and 25 meters.
Answer:
R=V/I=6/2=3 ohm
time = 5 minutes = 5*60=300 seconds
I=2 A
Energy = I²Rt=(2)²*3*300=4*900=3600 J
