The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the f

The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. In one such unit, the potential difference between the plates of a 700 碌F capacitor is 360 V.


(a) Determine the energy that is used to produce the flash in this unit.


(b) Assuming that the flash lasts for 5.0E-3 s, find the effective power or ';wattage'; of the flash.The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the f
Here,


capacitance, C = 700 uF


or, C = 700 * 10 ^ - 6 F





potential difference, V = 360 V





Energy, E = ?





time, t = 5 * 10 ^ -3 s





Power, P = ?





(a)


We know,


E = 1/2 CV^2


or, E = 1/2 * 700 * 10 ^ -6 * (360)^2


so, E = 45.36 Joule (ans.)





(b)


We know,


P = E/t


or, P = 45.36/(5*10^-3)


so, P = 9072 Watt (ans.)





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