Two Particles Have Charges Q and -Q (Equal Magnitude and Opposite

question 12

Multiple Choice

Two particles have charges Q and -Q (equal magnitude and opposite sign) .For a net force of zero to be exerted on a third charge it must be placed:

• A)midway between Q and -Q
• B)on the perpendicular bisector of the line joining Q and -Q, but not on that line itself
• C)on the line joining Q and -Q, to the side of Q opposite -Q
• D)on the line joining Q and -Q, to the side of -Q opposite Q
• E)at none of these places (there is no place)

Explain the criteria for goods being rivalrous and excludable, and how these properties influence their classification.

Understand the implications of goods that are non-excludable and/or non-rival in terms of potential market failures.

Assess externalities and their impacts on social welfare.

Evaluate the role of public policy in addressing free-rider problems and externalities.

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