A flat circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are parallel
A) 0 T ? m2
B) 3.1 × 10-3 T ? m2
C) 5.5 × 10-3 T ? m2
D) 6.3 × 10-3 T ? m2
A
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A. upright, magnified, and real.
B. upright, diminished, and virtual.
C. inverted, diminished, and real.
D. inverted, magnified, and virtual.
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At point P the magnetic field due to a long straight wire carrying a current of 2.0 A is 1.2 µT. How far is P from the wire? (?0 = 4? × 10-7 T ? m/A)
A) 33 cm B) 22 cm C) 11 cm D) 55 cm E) 44 cm
When an inflated balloon is released with its end unsealed and takes off across the room, how is momentum conserved?
a. Momentum is conserved because the balloon is displacing atmosphere molecules from the air around it. b. Momentum is conserved because the balloon is getting smaller. c. Momentum is conserved because the balloon is getting larger. d. Momentum is conserved because the air molecules inside the balloon are moving out in the opposite direction from the balloon's movement. e. Momentum is conserved because the air from the balloon pushes the air behind it.