What is the CGS and SI Unit of Power?
Power is the rate at which work is done or energy is transferred. In physics, power is typically measured in watts (W), which is the SI unit of power. However, there is another system of units, known as the CGS system, which uses a different unit of power, the erg per second (erg/s).
The CGS Unit of Power: Erg per Second
- The CGS unit of power is the erg per second.
- One erg per second is the rate at which energy is transferred when one erg of work is done in one second.
- The erg is a very small unit of energy, so the erg per second is a very small unit of power.
The SI Unit of Power: Watt
- The SI unit of power is the watt.
- One watt is the rate at which energy is transferred when one joule of work is done in one second.
- The joule is a larger unit of energy than the erg, so the watt is a larger unit of power than the erg per second.
Conversion Between CGS and SI Units of Power
- 1 watt = 107 ergs per second
- 1 erg per second = 10-7 watts
Applications of CGS and SI Units of Power
- The CGS unit of power, the erg per second, is commonly used in fields such as physics and astronomy, where very small amounts of power are involved.
- The SI unit of power, the watt, is commonly used in everyday applications, such as measuring the power consumption of electrical appliances.
Conclusion
The CGS and SI units of power are two different ways of measuring the rate at which energy is transferred. The CGS unit of power is the erg per second, while the SI unit of power is the watt. One watt is equal to 107 ergs per second. The choice of which unit to use depends on the application. For very small amounts of power, the erg per second is more convenient. For everyday applications, the watt is more convenient.
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