A Bird Can Safely Land on a Bare, High-Voltage Power

question 36

Multiple Choice

A bird can safely land on a bare, high-voltage power line because

• A) if both feet are touching the bare wire, they are at approximately the same potential, and therefore little or no current flows through the bird's body.
• B) its internal resistance is very high, so very little current will flow.
• C) the line cannot deliver enough current to harm it.
• D) its feet are good insulators, and therefore it is protected.

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Definitions:

Total Product

The total quantity of goods or services produced by a firm or economy at a given time, a measure of overall output or production performance.

Profit-maximizing Output

The level of production at which a firm achieves the highest possible profit, determined where marginal cost equals marginal revenue.

Marginal Product

The additional output that is produced by adding one more unit of a specific input, holding all other inputs constant.

Purely Competitive Market

A market structure characterized by many buyers and sellers, free entry and exit, and a homogeneous product, leading to price taking behavior.