Calculate the work done by a 5.0- V battery as it charges a 7.3- ? F capacitor i

Question

Calculate the work done by a 5.0-V battery as it charges a 7.3-?F capacitor in the flash unit of a camera. Express your answer using two significant figures.   W =                                                          ?J   Calculate the work done by a 5.0-V battery as it charges a 7.3-?F capacitor in the flash unit of a camera. Express your answer using two significant figures.   W =                                                          ?J     W =                                                          ?J     W =                                                          ?J     W =                                                          ?J  

Explanation / Answer

First of all charge Q= CV = 7.8 x 10^-6 F * 5 V= 39* 10^-6

Now W= VQ= (39* 10^-6) * 5= 195 * 10^-6 = 19*10^-5 J (two significant figures)

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