The number of complete oscillations per unit time is called the\ \ \ \ \ \ \ - RRB Nsg. Superintendent-20 July 2019 (Shift-2)

RRB Nsg. Superintendent-20 July 2019 (Shift-2)

Anatomy and Physiology

Easy

Appeared in: RRB Nsg. Superintendent-20 July 2019 (Shift-2)

Explanation

Frequency is the physical term for the number of repeating events, such as oscillations or waves, that occur per unit of time.
The standard unit for frequency is the Hertz (Hz), which is equivalent to one cycle per second.
This concept is fundamental to describing any periodic motion, from simple pendulums to electromagnetic waves.
The question asks for the term describing 'oscillations per unit time', which is the exact definition of frequency.

Option A: The time period is the duration required to complete one single oscillation. It is the reciprocal of frequency (Time = 1/Frequency), not the number of oscillations over time.
Option C: Amplitude refers to the maximum displacement or intensity of the wave from its equilibrium (center) position. It describes the wave's energy, not its rate of oscillation.
Option D: Wavelength is the spatial period of the wave, meaning the distance over which the wave's shape repeats. It is a measure of distance (e.g., from crest to crest), not of oscillations per time.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition of Frequency in Wave Motion as background academic context rather than a clinical decision trigger.
Understanding frequency is crucial in nursing for interpreting various medical technologies. For example, an Electrocardiogram (ECG) displays the heart's electrical activity, and its frequency (heart rate) is a primary vital sign.
Ultrasound imaging uses high-frequency sound waves to create images of internal body structures. The frequency chosen affects the penetration depth and resolution of the image.
What if? - If a patient's heart rate on an ECG is 150 beats per minute, the frequency is 2.5 Hz (150 cycles / 60 seconds). A low frequency (bradycardia) or a very high frequency (tachycardia) indicates a pathological condition requiring nursing intervention.

How to Approach the Question

This is a factual recall question that tests your knowledge of basic physics definitions.
First, carefully read the definition provided in the question stem: 'the number of complete oscillations per unit time'.
Analyze each option and compare it to the given definition.
Recall the specific definition for each term: frequency, time period, amplitude, and wavelength.
Identify that 'frequency' is the term that exactly matches the description of oscillations per unit of time.
Eliminate the other options by confirming their definitions relate to time per oscillation (time period), displacement (amplitude), or distance (wavelength).

Concept Tested & Keywords

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