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Module 3. Electrical fundamentals

A 20 Picofarad capacitor with a 1 Megohm resistor takes how long to charge?

  • 100 microseconds.
  • 20 milliseconds.
  • 1 second.

sasna asking:

pls solve

Community Comments (1)

D
dimky Posts: 513 27.07.2013 / 13:31
Full Charge = 5 * Time constant
Time Constant = R * C = (20 / 10000000000000000) * 1000000 = 20 us
Full Charge = 5 * 20 us = 100 us
http://www.electronics-tutorials.ws/rc/rc_1.html

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