The time constant in an RC circuit is the time it takes   a. so that the current drops to zero.   b. so that the current reaches its maximum value   c. so that the capacitor is fully charged.   d. in which the current decreases to 37% of its initial value.

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Chapter21: Circuits And Dc Instruments
Section: Chapter Questions
Problem 33CQ: Draw two graphs of charge versus time on a capacitor. Draw one for charging an initially uncharged...
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The time constant in an RC circuit is the time it takes
 
a. so that the current drops to zero.
 
b. so that the current reaches its maximum value
 
c. so that the capacitor is fully charged.
 
d. in which the current decreases to 37% of its initial value.
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