PHYS 1202 : Physics 2 EXAM 3 REVIEW
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Ans: b: what happens to the magnetic field inside a solenoid if the current is doubled, it is doubled, it is cut in half, it stays the same, there is no magnetic field inside, it reverses. Ans: a: a wire carries a current of 30 a along the x-axis from x = 0 to x = +3 0. cm . Determine the magnitude in t of the magnetic field at the point y = 4 0. cm on the y-axis: 57, 51, 45, 63, 75. Ans: c: three long wires parallel to the x-axis carry currents as shown. If i = 20 a, what is the magnitude of the magnetic field at the origin in t? y. I y = +2 m x y = 1 m y = 3 m: 37, 28, 19, 47, 12. Ans: c: two long parallel wires carry unequal currents in the same direction. The ratio of the currents is 3 to 1.
