An Electron Passes Through a Region Where There Is an Electric

question 17

Multiple Choice

An electron passes through a region where there is an electric field E = 4.0 $\times$ 10⁵ V/m and a magnetic field B = 0.090 T.The directions of the electric field,the magnetic field,and the electron velocity are mutually perpendicular.If the electron is not deflected from its straight-line path through these fields,its velocity must be

• A)3.6 \(\times\) 10⁴ m/s
• B)5.0 \(\times\) 10⁵ m/s
• C)2.2 \(\times\) 10^-7 m/s
• D)1.2 \(\times\) 10⁴ m/s
• E)4.4 \(\times\) 10⁶ m/s

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Definitions:

Evacuation system

A mechanism or infrastructure designed for the safe and efficient removal of people from a dangerous or potentially dangerous area.

Plasma

The liquid component of blood, comprising about 55% of its volume, in which cells and other components are suspended.

Liquid portion

The liquid component of a substance, often referred to in contexts such as blood, where it is the part not containing cells.

Blood cells

Cells that circulate in the bloodstream, comprising red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).