In 1954,the American Scientist Jonas Salk Developed a Vaccine for the Prevention

question 66

Multiple Choice

In 1954,the American scientist Jonas Salk developed a vaccine for the prevention of

• A) polio.
• B) tuberculosis.
• C) influenza.
• D) yellow fever.
• E) typhoid.

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Definitions:

Phase Angle

A measurement, often in degrees or radians, indicating the difference in phase between two waveforms.

Parallel Circuit

An electrical circuit configuration where components are connected alongside each other, leading to the same voltage across all components but different current through each.

Inductive Reactance

The opposition that inductors present to current change in AC circuits, measured in Ohms.

Power Factor

A dimensionless number between -1 and 1 that represents the phase difference between the voltage and current in an alternating current (AC) electrical circuit.