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The flash unit in a camera uses a special circuit to "step up" the 3.0 V...

The flash unit in a camera uses a special circuit to "step up" the 3.0 V from the batteries to 270 V , which charges a capacitor. The capacitor is then discharged through a flashlamp. The discharge takes 11 μs , and the average power dissipated in the flashlamp is 1.0×10^5 W .

What is the capacitance of the capacitor?

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