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The electric mains in a house are marked...

The electric mains in a house are marked 220V-50Hz. Write down the equation for instantaneous voltage.

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To find the equation for the instantaneous voltage from the given information about the electric mains, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the given information**: - The electric mains voltage is given as 220V (RMS) and the frequency is 50Hz. 2. **Identify the formula for instantaneous voltage**: ...
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