NEET Physics MCQ Quiz
Test your understanding of fundamental concepts
Question 1 of 1
Example 14.1: On an average a human heart is found to beat 75 times in a minute. Calculate its frequency and period.
Hint: Frequency is the number of oscillations per second, and period is the time for one complete oscillation. Remember to convert minutes to seconds.
Explanation:
Correct Answer: C) Frequency = 1.25 Hz, Period = 0.8 s
The beat frequency of heart = 75 beats / (60 s) = 1.25 s⁻¹ = 1.25 Hz.
The time period T = 1/frequency = 1/(1.25 s⁻¹) = 0.8 s.
Why other options are incorrect:
- A) Incorrectly swaps frequency and period values.
- B) Uses the same value for both frequency and period, which is impossible since they are reciprocals.
- D) Uses the beats per minute value directly as frequency in Hz without conversion, and calculates period incorrectly from this wrong frequency.
Key Concept: Frequency (f) is the number of oscillations per unit time, measured in Hertz (Hz). Period (T) is the time for one complete oscillation, measured in seconds. They are related by T = 1/f.
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