Name ____________________________________________________________For full credit, show your calculations, beginning with a formula and including units in all calculationsand answers.1. (10 points) Camera Electronic Flash An electronic flashgun has a 1000-F capacitor that is chargedto 100 V. (Remember that 1000 F = 1000 x 106 F.(a) How much energy is stored by the capacitor? = = ( ) 1 2 = (/) = ( )2 0OR1 211 = ( ) = = 22 221 = 1000106 (100)2 = 52(b) What is the charge on the capacitor? = = 1000106 100 = 0.1(c) When the photographer takes a picture, the flash fires for 1/2000 s. What is the average currentthrough the flash tube?==0.1== 20012000(d) Find the power delivered to the flashtube. = = 200100 = 20000(e) After a picture is taken, the capacitor has to be recharged by a power supply that delivers amaximum current of 10 mA. How long will it take to charge the capacitor?==0.1= 100.01Name ____________________________________________________________2. (3 points) Computer Keyboard In one kind of computer keyboard, each key is attached to oneplate of a parallel-plate capacitor; the other plate is fixed in positio ...
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