Answer :
Final answer:
The lighting and power equipment used on an emergency scene generally operate at 110 volt AC. This is the standard voltage for electrical outlets in many parts of the United States. Electric power generation involves voltages much higher for efficiency, then stepped down using transformers for safer usage.
Explanation:
The lighting and power equipment used on an emergency scene generally operate at 110 volt AC. This is because typical electrical outlets in United States homes operate at around 120V. However, the voltage fluctuates in a sinusoidal pattern between -170V and +170V around 60 times per second, giving us an average value of around 120V.
For efficiency, electric power is generated at voltages greater than 10kV and transmitted at voltages ranging from 120kV to 700kV to minimize energy losses. This voltage is then stepped down at various points in power distribution systems to approximately 120V, 240V, or 480V for safety reasons when distributed to the user site. This is achieved using transformers, which can step up or step down voltage levels to cater to various applications such as emergency response equipment and house appliances.
The lighting and power equipment used on an emergency scene generally operate at 110 volt AC.
This means that the AC voltage swings from 170 V to -170 V and back 60 times every second. An equivalent DC voltage is a constant 120 V.
In power distribution systems, voltages ranging from 120 to 700 kV are used for transmitting power over long distances. However, at the individual user site, the voltage is typically stepped down to 120, 240, or 480 V for safety.
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