A Metal Rod of Length 2

question 21

Multiple Choice

A metal rod of length 2.0 m is moved at 6.0 m/s in a direction perpendicular to its length. A 5.0 mT magnetic field is perpendicular to both the rod and its velocity. If the resistance of the rod is 15 mΩ, what is the current in the rod?

• A) 0.0 A
• B) 1.0 A
• C) 2.0 A
• D) 4.0 A
• E) 8.0 A

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Definitions:

Average Tax Rate

The proportion of total income that is paid in taxes, calculated by dividing the total amount of taxes paid by the taxpayer's total income.

Marginal Tax Rate

The rate at which the last dollar of income is taxed, indicating how much tax will be paid on an additional dollar of income.

Average Tax Rate

The percentage of total income that is paid as tax, calculated by dividing the total tax amount by the total income.

Marginal Tax Rate

The rate at which the next dollar of taxable income is taxed; refers to the percentage of tax applied to the last dollar earned.