Pictures
True / False
Short Answer
100
Do all of these items above represent capacitors?
Yes
100
In parallel grouping:
Voltage across each capacitor is the same as the equivalent voltage of the capacitors.
True
100
what is a capacitor?
It is an electronic component that constitutes of two close conducting plates and is separated by an insulator.
200
What does this symbol represent?
A fixed value capacitor.
200
The current passing through capacitors connected in series have the same voltage across each capacitor.
False.
The current passing through capacitors connected in series have the same "current" across each capacitor.
200
What is the electric energy stored by a capacitor, of capacitance 1.2 mF, when it is subjected to a voltage of 6V?
We = ½ CU2 = ½ (1.2x10-3) x 62 = 0.0216 J = 21.6x10-3 J
300
Do the above two symbols mean the same? What does each symbol represent?
Yes they are the same; they represent the symbol of a variable capacitor.
300
In series grouping:
The equivalent capacitance is greater than the smallest individual capacitance value.
False.
The equivalent capacitance is "less" than the smallest individual capacitance value.
300
What can we say about the capacitor's voltage once the capacitor is fully charged?
Once the capacitor is fully charged, Its voltage Vc becomes equal to the power supply voltage V.
400
What kind of capacitor is this? What special characteristic does it have?
This is a trimmer capacitor. It is a variable capacitor where capacitance value can be changed by a mechanical adjustment and are mainly used in tuning circuits.
400
C1=0.1uF, C2=0.2uF, C3=0.3uF
The total equivalent capacitance of the grouping above is equal to 55nF.
True.
1/Ceqv. = 1/C1 + 1/C2 +1/C3
= 1/0.1uF + 1/0.2uF + 1/0.3uF
= 1/18.33 * 106
Ceqv = 0.055uF = 55nF
400
What is a time constant in an RC circuit?
In RC (resistive & capacitive) circuits, a time constant is the time in seconds required to charge a capacitor to 63% of the applied voltage.