The magnetic field at a distance r_0 from a long straight wire carrying a curren
ID: 1453970 • Letter: T
Question
The magnetic field at a distance r_0 from a long straight wire carrying a current I is given by B = mu_0I/2pi r_0. For the statements below, circle the word or phrase that correctly completes the sentence. For a fixed current of 3.00 A in the wire, the magnetic field sensed by a Hall probe will___if the distance r_0 is changed from 0.6 cm to 1.2 cm. (double. triple, reduce to half, reduce by 0.6 mT) If the current I is reduced from 3.00 A to 1.50 A for a fixed value of r_0 = 2.00 cm, the magnetic field sensed by a Hall probe will___. (double, triple, reduce to half, reduce by 1.5 mT) If B is plotted against several values of r_0 for a fixed current I, the graph will be a___. (straight line of positive slope, straight line of negative slope, curve decreasing with increasing r (positive curvature), curve increasing with increasing r (negative curvature) Regions of constant magnetic field around a current carrying wire form___when viewed in cross section. (straight lines, triangles, circles, squares, hyperbolas) If B is plotted against several values of I for a fixed distance r_0, the graph will be a___. (straight line of positive slope, straight line of negative slope, curve upwards of positive curvature, curve downwards of negative curvature).Explanation / Answer
a) reduces to half ( inversely poportional)
b) reduces to half ( from above equatin)
c)curve decreasing with increasing r
d) circles
e ) straight line with positive slope
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