A high power line carries a current of 1.0 kA. What is the strength of the magnetic field this line produces at the ground, 10 m away? (?0 = 4? × 10-7 T ? m/A)
A) 4.7 µT B) 20 µT C) 6.4 µT D) 56 µT
B
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Which of these planets is approximately the same size as Earth?
a. Venus b. Mars c. Saturn d. Mercury e. Pluto
A closed loop conductor that forms a circle with a radius of is located in a uniform but changing magnetic field
If the maximum emf induced in the loop is what is the maximum rate at which the magnetic field strength is changing if the magnetic field is oriented perpendicular to the plane in which the loop lies? A) 0.40 T/s B) 2.5 T/s C) 0.080 T/s D) 5.0 T/s
Earth's third largest ocean is the ______________ Ocean
Fill in the blank(s) with correct word
The direction of the force on a current-carrying wire in a magnetic field is described by which of the following?
A) parallel to the current only B) parallel to the magnetic field only C) perpendicular to the current only D) perpendicular to the magnetic field only E) perpendicular to both the current and the magnetic field