Answer: Electronic flash units for cameras contain a

Chapter 24, Problem 47P

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QUESTION:

Problem 47P

Electronic flash units for cameras contain a capacitor for storing the energy used to produce the flash. In one such unit, the flash lasts for \(\frac{1}{675}\)S with an average light power output of \(2.70 \times 10^{5}\) W. (a) If the conversion of electrical energy to light is 95% efficient (the rest of the energy goes to thermal energy), how much energy must be stored in the capacitor for one flash? (b) The capacitor has a potential difference between its plates of 125 V when the stored energy equals the value calculated in part (a). What is the capacitance?

Equation Transcription:

Text Transcription:

1/675

2.70x10^5

Questions & Answers

QUESTION:

Problem 47P

Electronic flash units for cameras contain a capacitor for storing the energy used to produce the flash. In one such unit, the flash lasts for \(\frac{1}{675}\)S with an average light power output of \(2.70 \times 10^{5}\) W. (a) If the conversion of electrical energy to light is 95% efficient (the rest of the energy goes to thermal energy), how much energy must be stored in the capacitor for one flash? (b) The capacitor has a potential difference between its plates of 125 V when the stored energy equals the value calculated in part (a). What is the capacitance?

Equation Transcription:

Text Transcription:

1/675

2.70x10^5

ANSWER:

Solution 47P

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