1. There are two identical capacitors A and B. A initial has 4 Coulomb charge, w
ID: 1446265 • Letter: 1
Question
1. There are two identical capacitors A and B. A initial has 4 Coulomb charge, while B only has 2 Coulomb. When they discharge through two identically resistors, THEORETICALLY, A needs twice as much time as B does to fully discharge. true or false?
2. A capacitor is connected to a power supply with fixed voltage. The net charge found on either plate of the capacitor is proportional to its capacitance. true or false?
3. The time constant of an RC ciruit is 5 seconds, which means that it takes 5 seconds to fully charge the capacitor. trueor false?
Explanation / Answer
1.
There are two identical capacitors A and B.
A initial has 4 Coulomb charge,
B only has 2 Coulomb
the time constant of RC - Circuit is T = R X C
if capacitor A takes 10 sec to discharge then B only takes 5 sec
because Time is proportional to the resistance and capacitance
so answer is : TRUE
2 .
A capacitor is connected to a power supply with fixed voltage.
The net charge found on either plate of the capacitor is proportional to its capacitance.
so answer is : TRUE
3.
The time constant of an RC ciruit is 5 seconds,
which means that it takes 5 seconds to fully charge the capacitor.
so answer is : FALSE
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