The Figure Shows a Velocity Selector That Can Be Used

question 9

Multiple Choice

The figure shows a velocity selector that can be used to measure the speed of a charged particle. A beam of particles is directed along the axis of the instrument. A parallel plate capacitor sets up an electric field E, which is oriented perpendicular to a uniform magnetic field B. If the plates are separated by 2.0 mm and the value of the magnetic field is 0.60 T, what voltage between the plates will allow particles of speed 5.0 × 10⁵ m/s to pass straight through without deflection?

• A) 600 V
• B) 1900 V
• C) 3800 V
• D) 190 V
• E) 94 V

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Definitions:

Marginal Tax Rate

The rate at which an additional dollar of income is taxed, serving as a useful measure of the impact of taxes on incentives to earn more.

Average Tax Rate

The ratio of the total amount of taxes paid to the taxpayer's total taxable income.

Federal Income Tax

A tax levied by the federal government on individuals' and businesses' annual earnings, used to fund public services and government obligations.

Marginal Tax Rate

The rate at which the last dollar of income is taxed, indicating the taxation rate for each additional dollar earned.