A Beam of Electrons Moving at a Speed of 8 $\times$

question 3

Multiple Choice

A beam of electrons moving at a speed of 8 $\times$ 10⁴ m/s is undeflected when it passes through an electric field of 5 N/C perpendicular to its path and a magnetic field that is perpendicular to its path and also to that of the electric field.Calculate the strength of the magnetic field.

• A)1.60 \(\times\) 10⁴ T
• B)6.25 \(\times\) 10^-5 T
• C)7.81 \(\times\) 10^-10 T
• D)3.13 \(\times\) 10^-5 T
• E)1.25 \(\times\) 10^-4 T

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Definitions:

U.S. Cigarette Industry

The industry comprising companies operating within the United States that manufacture, distribute, and sell cigarettes and related products.

Oligopoly

A market structure characterized by a small number of firms that dominate the market, leading to limited competition and potentially higher prices for consumers.

Perfectly Competitive

describes a market structure where there are many buyers and sellers, products are homogeneous, and there are no barriers to entry or exit, leading to optimal distribution and resource allocation.

Contestable Markets

Markets in which entry and exit are easy enough to hold prices to a competitive level even if no entry actually occurs.