What is the SI unit of frequency?
Hertz (Hz)
Joule (J)
Newton (N)
Pascal (Pa)
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Units of Frequency – Definition, List, Formulas, Conversion chart
Units of Frequency – Definition, List, Formulas, Conversion chart
What are Units of Frequency?
Units of frequency measure how often an event occurs in a specific amount of time, typically in seconds. The base unit of frequency is the hertz (Hz), which represents one cycle per second.
List of Frequency Units
- Hertz (Hz)
- Kilohertz (kHz)
- Megahertz (MHz)
- Gigahertz (GHz)
- Terahertz (THz)
- Petahertz (PHz)
- Exahertz (EHz)
- Zettahertz (ZHz)
- Yottahertz (YHz)
Hertz (Hz)
Definition: The base unit of frequency in the International System of Units (SI), representing one cycle per second. It measures how often an event happens over time.
Common Use: Used for describing the frequencies of audible sounds, and electrical signals.
Kilohertz (kHz)
Definition: Equivalent to 1,000 hertz.
Common Use: Often used in radio frequency equipment, audio signals, and lower frequency electromagnetic waves.
Megahertz (MHz)
Definition: Equal to 1,000,000 hertz or 1,000 kHz.
Common Use: Commonly used to describe the frequencies used in FM and TV broadcasting, as well as in the field of telecommunications like mobile phone frequencies.
Gigahertz (GHz)
Definition: Equal to 1,000,000,000 hertz or 1,000 MHz.
Common Use: Typically used to describe the clock speeds of computer processors and the frequencies of microwave frequencies, including those used for cellular telephone signals.
Terahertz (THz)
Definition: Equal to 1 trillion hertz (1,000,000,000,000 Hz).
Common Use: Terahertz radiation is utilized in scientific research, particularly in imaging and spectroscopy for materials science, security scanning, and biomedical applications.
Petahertz (PHz)
Definition: Equal to 1 quadrillion hertz (1,000,000,000,000,000 Hz).
Common Use: These frequencies are primarily of interest in ultrafast science where researchers study the extremely fast processes such as the dynamics of chemical reactions and quantum physics phenomena.
Exahertz (EHz)
Definition: Equal to 1 quintillion hertz (1,000,000,000,000,000,000 Hz).
Common Use: Not commonly used in practical applications but can describe theoretical studies and high-energy physics, including some forms of gamma radiation.
Zettahertz (ZHz)
Definition: Represents frequencies in the order of 10^21 hertz.
Common Use: Like exahertz, this unit is not used in everyday applications but can relate to frequencies observed in astrophysical phenomena and some theoretical models.
Yottahertz (YHz)
Definition: The largest frequency unit, representing 10^24 cycles per second.
Common Use: This unit is mainly theoretical and used in scientific research that explores the highest possible frequencies, far beyond the electromagnetic spectrum commonly used in technology today.
Conversion of Frequency Units
| Frequency Unit | Equivalent in Hertz (Hz) |
|---|---|
| Kilohertz (kHz) | 1 kHz = 1,000 Hz |
| Megahertz (MHz) | 1 MHz = 1,000,000 Hz |
| Gigahertz (GHz) | 1 GHz = 1,000,000,000 Hz |
| Terahertz (THz) | 1 THz = 1,000,000,000,000 Hz |
| Petahertz (PHz) | 1 PHz = 1,000,000,000,000,000 Hz |
| Exahertz (EHz) | 1 EHz = 1,000,000,000,000,000,000 Hz |
| Zettahertz (ZHz) | 1 ZHz = 1e21 Hz |
| Yottahertz (YHz) | 1 YHz = 1e24 Hz |
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Practice Test
Which unit is equivalent to one cycle per second?
Joule
Hertz
Newton
Watt
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What does the unit "Hertz" measure?
Force
Energy
Frequency
Pressure
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If a wave has a frequency of 50 Hz, how many cycles occur in one second?
5 cycles
50 cycle
500 cycles
5000 cycl
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Which of the following is not a unit of frequency?
Hertz (Hz)
Cycles per second (cps)
Kilohertz (kHz)
Newton (N)
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Convert 1000 Hz to kilohertz.
1 kHz
10 kHz
100 kHz
1000 kHz
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What is the unit for frequency in the CGS (centimeter-gram-second) system?
Dyne
Erg
Hertz
Gauss
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If the frequency of a sound wave is 0.5 kHz, what is it in Hertz?
50 Hz
500 Hz
5000 Hz
0.5 Hz
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Which unit of frequency is commonly used to describe radio waves?
Hertz
Kilohertz
Megahertz
Gigahertz
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What is the frequency of a wave with a period of 0.01 seconds?
100 Hz
10 Hz
1 Hz
0.1 Hz
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