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:

Actual Authority

The express or implied power granted by a principal to its agent, allowing the agent to perform acts on the principal's behalf, which legally binds the principal with third parties.

Apparent Authority

The appearance or assumption of authority based on the actions, words, or deeds of the principal or because of circumstances the principal created.

Doctrine of Estoppel

A legal principle that prevents a person from asserting something contrary to what is implied by a previous action or statement by them, or by a previous relevant judicial determination.

Expressly Bind

To clearly, explicitly, or directly impose a legal obligation or duty.