A Circular Coil (Radius = 0

question 70

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:

Raw Material

The basic substances or components that are processed or used in the manufacturing of goods.

Direct Labor-Hours

The cumulative number of labor hours directly engaged in manufacturing goods or services.

Materials Price Variance

The difference between the actual cost of materials and the standard cost, multiplied by the quantity of materials purchased.

Variable Manufacturing

Costs in manufacturing that change in proportion to the volume of production, such as materials and labor.