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# The circuit of Figure P559 models the charging circuit of an electronic flash for a camera As you know after the flash is used it takes some time for it to recharge a If the light that

The circuit of Figure P5.59 models the charging circuit of an electronic flash for a camera. As you know, after the flash is used, it takes some time for it to recharge.

a.    If the light that indicates that the flash is ready

10

8

6

4

2

0

–2

Figure P5.60

0.5                            1                               1.5                (s)

turns on when V= 0.99 × 7.5 V, how long will you have to wait before taking another

picture?

b.    If the shutter button stays closed for 1/30 s, how much energy is delivered to the flash bulb, represented by R2? Assume that the capacitor has completely charged.

c.    If you do not wait till the flash is fully charged and you take a second picture 3 s after the flash is first turned on, how much energy is delivered

to R2?

Jun 19 2020 View more View Less