An electric bulb is designed to operate at `12 volts DC`. If this bulb is connected to an AC source and gives normal brightness, what would be the peak voltage of the source?

Explanation

To solve the problem, we need to find the peak voltage of an AC source that allows a bulb designed for 12 volts DC to operate at normal brightness. Here’s a step-by-step solution:

### Step 1: Understand the relationship between AC and DC voltage
The bulb operates normally at 12 volts DC. When connected to an AC source, it gives normal brightness, which indicates that the root mean square (RMS) voltage of the AC source is equal to the DC voltage.

**Hint:** Remember that the RMS value of an AC voltage is what determines the effective voltage that can do work, similar to a DC voltage.

### Step 2: Set the RMS voltage equal to the DC voltage
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