Each of two long straight parallel wires separated by a distance of 16 cm carries a current of 20 A in the same direction. What is the magnitude of the resulting magnetic field at a point that is 10 cm from each wire?
a. 57 mT
b. 80 mT
c. 64 mT
d. 48 mT
e. 40 mT
D
You might also like to view...
As atmospheric pressure increases, what happens to the velocity of sound? (Assume that all other factors remain constant.)
A) It increases. B) It decreases. C) It does not change. D) It increases on warm days and decreases on cold days.
A beam of unpolarized light in air strikes a flat piece of glass at an angle of 57.3°. If the reflected beam is completely polarized, what is the index of refraction of the glass?
A) 1.50 B) 1.52 C) 1.54 D) 1.56 E) 1.58
Lenz's Law: As shown in the figure, a metal bar is in contact with a pair of parallel rails. A steady, uniform, magnetic field B is present directed to the right. The bar is moving upward with velocity of magnitude ?. What is the polarity of the induced emf in terminals X and Y?
A. X and Y are at the same potential. B. X is positive and Y is negative. C. Y is positive and X is negative.
About 15% by mass of Earth's core is composed of the element(s)
a. iron b. nickel c. oxygen. d. silicon. e. iron and nickel.