Question
Asked Nov 10, 2019
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Exercise:
For the circuit of Figure 2 with the parameters of Table 2, what is the time constant
associated with the opening of the switch?
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Exercise: For the circuit of Figure 2 with the parameters of Table 2, what is the time constant associated with the opening of the switch?

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ww
С
R2
4 V
Figure 2: Second RC circuit
Table 2: Component values for Figure 2
R2
3 kΩ
R1
1 k2
С
0.1 μF
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ww С R2 4 V Figure 2: Second RC circuit Table 2: Component values for Figure 2 R2 3 kΩ R1 1 k2 С 0.1 μF

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Expert Answer

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Step 1

For RC circuits, time constant is defined as the product of the capacitance with the equivalent resistance of the circuit. Unit of time constant is second (s). This is expressed by equation (1).

7=RxCs > (1)
R=Value of the equivalent resistance in Q
C Value of the capacitance in F
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7=RxCs > (1) R=Value of the equivalent resistance in Q C Value of the capacitance in F

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Step 2

After the switch has been opened, the effective circuit can be represented in the following way:

C
R2
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C R2

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Step 3

Since no current will be flowing through the resistor R1, the value ...

RR3 k = 3000
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RR3 k = 3000

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