what will happen to a reading of a voltmeter if it is attached to a charged capacitor
a) it will go up slowly
b) it will remain constant
c) it will go down slowly
d) it will drop abruptly to zero
2007-06-12 07:54:58 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
C) it will go down slowly.
The internal resistance of the voltmeter will discharge the capacitor, but since the internal resistance is very high, it will discharge "slowly"
.
2007-06-12 08:01:54 · answer #1 · answered by tlbs101 7 · 1⤊ 0⤋
Voltage reading will go down slowly because the internal resistance of the VOM enables it to discharge slowly. If the internal resistance is very low, say a piece of wire (in effect shorting the capacitor leads), the discharge time is so rapid that a spark will ensue. This is dictated by the RC Time constant---the time it takes to charge or discharge a capacitor: R being the resistance and C the capacitance.
2007-06-12 17:27:03 · answer #2 · answered by cant_help_but_wonder 1 · 0⤊ 0⤋
c
2007-06-12 15:02:37 · answer #3 · answered by The engineer 2 · 0⤊ 0⤋