Choose the One Alternative That Best Completes the Statement or Answers

question 158

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-A spotlight has a parabolic cross section that is 6 ft wide at the opening and 2.5 ft deep at the vertex. How far from the vertex is the focus? Round answer to two decimal places.

• A) 0.21 ft
• B) 0.52 ft
• C) 0.26 ft
• D) 0.90 ft

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Definitions:

Voltage Drop

The decrease in electrical potential along the path of a current flowing in an electrical circuit, affecting the circuit's performance.

Power Consumed

The total amount of energy used by a device or system during its operation.

Lightbulb

A device that emits light when an electrical current passes through it, available in various types for differing lighting applications.

Dead Short

An electrical fault characterized by a direct current path that allows a surge of electrical current, potentially causing damage or fire.