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**[SOLVED] calculate RMS current!?**

**1. Homework Statement**

The maximum potential difference across certain heavy-duty appliances is 240 V. Assume that the total resistance of an appliance is 190 ohms.

(a) Calculate the rms potential difference.

169.68V <--CORRECT

but for

(b) calculate the RMS current,

i have no idea what to do!?