Two long parallel wires separated by 5.0 mm each carry a current of 60 A. These two currents are oppositely directed. What is the magnitude of the magnetic field at a point that is between the two wires and 2.0 mm from one of the two wires?
a. 2.0 mT
b. 10 mT
c. 8.0 mT
d. 1.6 mT
e. 7.2 mT
b
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Does an electric field exert a force on a moving charged object? Assume the motion of the charged object is along the x axis and the field is in the y direction
1.yes 2.no
The pressure in the oil (S = 0.86) pipe is 12 kPa. The pressure in the water pipe is nearest:
(A) -34.8 kPa
(B) -28.8 kPa
(C) -18.8 kPa
(D) -13.1 kPa
A parallel plate capacitor has the voltage applied to it doubled. Is the force between the plates attractive or repulsive, and what happens to the force between the plates when the voltage is doubled?
a. The force is attractive and it quadruples. b. The force is attractive and it doubles. c. The force is repulsive and it halves. d. There is no force between the plates since the net charge is zero on the capacitor.