A Circular Coil (Radius = 0

question 12

Multiple Choice

A circular coil (radius = 0.40 m) has 160 turns and is in a uniform magnetic field.When the orientation of the coil is varied through all possible positions,the maximum torque on the coil by magnetic forces is 0.16 N . m when the current in the coil is 4.0 mA.What is the magnitude of the magnetic field?

• A)0.37 T
• B)1.6 T
• C)0.50 T
• D)1.2 T
• E)2.5 T

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Definitions:

Standard Error

A measure of the dispersion or variability of a sampling distribution.

Slope

The measure of the steepness or incline of a line, defined as the ratio of the vertical change to the horizontal change between two points on the line.

True Slope

The actual slope of the relationship between two variables in the population, as opposed to an estimated slope.

Least-Squares Regression

A statistical method that estimates the best-fitting line through a set of points by minimizing the sum of the squares of the vertical distances from the points to the line.