80. FIGURE 21-54 shows a simplified circuit for a photographic flash unit. This circuit consists of a 9.0-V battery, a 50.0-k resistor, a 140-μF capacitor, a flashbulb, and two switches. Initially, the capacitor is uncharged and the two switches are open. To charge the unit, switch S₁ is closed; to fire the flash, switch S₂ (which is connected to the camera's shutter) is closed. How much time does it take to charge the capacitor to 5.0 V? ●● 9.0 V S₁ 50.0 ΚΩ 140 με FIGURE 21-54 Problem 80 S₂
80. FIGURE 21-54 shows a simplified circuit for a photographic flash unit. This circuit consists of a 9.0-V battery, a 50.0-k resistor, a 140-μF capacitor, a flashbulb, and two switches. Initially, the capacitor is uncharged and the two switches are open. To charge the unit, switch S₁ is closed; to fire the flash, switch S₂ (which is connected to the camera's shutter) is closed. How much time does it take to charge the capacitor to 5.0 V? ●● 9.0 V S₁ 50.0 ΚΩ 140 με FIGURE 21-54 Problem 80 S₂
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Transcribed Image Text:80. FIGURE 21-54 shows a simplified circuit for a photographic flash
unit. This circuit consists of a 9.0-V battery, a 50.0-k resistor,
a 140-μF capacitor, a flashbulb, and two switches. Initially, the
capacitor is uncharged and the two switches are open. To charge
the unit, switch S₁ is closed; to fire the flash, switch S₂ (which is
connected to the camera's shutter) is closed. How much time does
it take to charge the capacitor to 5.0 V?
H
9.0 V
S₁
50.0 ΚΩ
140 μF
FIGURE 21-54 Problem 80
S2
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