A Beam of Electrons Is Undeflected When It Passes Simultaneously

question 56

Multiple Choice

A beam of electrons is undeflected when it passes simultaneously through an electric field of 10 N/C perpendicular to its path and a magnetic field of 2 × 10^-4 T perpendicular both to its path and to the electric field. The speed of the electrons is approximately

• A) 2 × 10^-4 m/s.
• B) 1 × 10⁴ m/s.
• C) 5 × 10^-4 m/s.
• D) 2 × 10⁴ m/s.
• E) 5 × 10⁴ m/s.

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Definitions:

Consumer Surplus

The variance between the total price consumers are ready and able to fork over for a good or service and the sum they ultimately pay.

Deadweight Loss

A loss of economic efficiency that can occur when the equilibrium for a good or a service is not achieved or is not achievable.

Consumer Surplus

The difference between the total amount that consumers are willing to pay for a good or service and the total amount they actually do pay.

Consumer Surplus

The difference between what consumers are willing to pay for a good or service and what they actually pay, indicating the economic benefit to consumers.