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An RC Flasher circuit uses a neon lamp that becomes highly conducting when the voltage applied to it reaches Vc = 90.0 V. With the switch closed, you want the lamp to flash every 2.0 seconds. (E=180V)

1. What "RC-time-constant" should the circuit have?

2. If C= 0.50 microFarad, what value of resistance should be used?

3. Having already installed the correct R, now another capacitor C=1.50 MicroFarad is connected in parallel with C. What is the new time interval between flashes?

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