A Single Circular Loop of Radius 1

question 24

Multiple Choice

A single circular loop of radius 1.00 m carries a current of 10.0 mA. It is placed in a uniform magnetic field of magnitude 0.500 T that is directed parallel to the plane of the loop as suggested in the figure. What is the magnitude of the torque exerted on the loop by the magnetic field?

• A)1.57 × 10^-2 N . m
• B)3.14 × 10^-2 N . m
• C)6.28 × 10^-2 N . m
• D)9.28 × 10^-2 N . m
• E)zero N . m

Understand the basic structure of the atom and the periodic table, including atomic number and mass number.

Identify the role of electrons in chemical bonding and reactions.

Understand the significance of molecular properties such as electronegativity and how they influence chemical bonds.

Describe energy changes in chemical reactions and the principles underlying them.

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Definitions:

Biological Magnification

The increased concentration of toxic chemicals, such as PCBs, heavy metals, and certain pesticides, in the tissues of organisms at higher trophic levels in food webs.

Bioconcentration

The accumulation of a substance in the tissues of living organisms at higher concentrations than in the surrounding environment.

Pesticide Treadmill

A situation where farmers must continuously use more and different chemicals to control pests that have developed resistance to pesticides.

Net Primary Productivity

The rate at which all the plants in an ecosystem produce net useful chemical energy; essentially, it is the amount of energy that is available to the primary consumers in an ecosystem.