RC Time Constant in RC Circuits

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18 Questions

The instantaneous voltage across resistor R is eR = E – ______

ec

The instantaneous current passing through R and C is eR iC = R E - ______

eC

If the charge on the capacitor C is zero at the instant that the switch is closed, then at t = 0, the current passing through R and C is E - eC iC = R ______

10 v

This current causes the capacitor C to charge with the polarity illustrated, so that at time t1, the capacitor voltage eC could be ______ volts

3

This alters eR eR = E – ec = 10 v – 3 v = ______ v

7

Because C has accumulated some charge, eC is increased and the voltage across R is reduced; thus the charging current through R is also ______

reduced

The product RC is the time constant of the RC circuit. It is the time when the capacitor is charged to 63.2% E, regardless of the value of E, R, and C. At time 5 RC, the capacitor is charged to 99.3% E, regardless of the value of E, R, and C. For practical purposes, it is assumed that the capacitor is fully charged or discharged at t = ____ RC.

5

The exponential constant in the RC circuit operation equation is represented by the symbol ______

e

When the capacitor is discharged through a resistor without a supply voltage, the capacitor voltage at any time during discharge can be computed using the equation ec = E - (E - Eo)e^(-t/RC), where ec represents the ______

capacitor voltage

At t = RC, the current flowing through R and C is _____ % I. Where I is the initial charging current which is equal to E / R.

36.8

In an RC circuit, if the capacitor initially has a voltage of -3 volts and is charged from a 6V source through a 10kohm resistor, the capacitor voltage after 8 ms will be ______ volts

1.96

When a capacitor is charged from a DC voltage source through a resistor, the instantaneous level of the capacitor voltage may be calculated at any given time. There is a definite relationship between the time constant of the RC network and the time required for the capacitor to charge to approximately _____ % and 99% of the input voltage.

63

Regardless of the values of E, R, and C, the capacitor reaches 63.2% of the charging voltage when the time is equal to ______

RC

During the time that input voltage is positive, C is charged towards the peak voltage of the input signal. The output voltage across R is equal to the input V1 voltage minus the voltage across the _____.

capacitor

The initial charge on the capacitor in an RC circuit is denoted by the symbol ______

Eo

When the input signal becomes 0 V, the capacitor discharges through R, during which the current is in the reverse direction, causing a negative going pulse across _____.

R

RC Time Constant represents the time when the capacitor is charged to _____% of the input voltage, regardless of the specific values of E, R, and C.

63.2

The time constant in an RC circuit is given by the product of the resistance R and the capacitance C, represented as ______

RC

Learn about the concept of RC Time Constant in RC circuits, which is defined as the time it takes for the capacitor to charge to 63.2% and 99.3% of the total voltage, regardless of the values of resistance (R) and capacitance (C). The quiz also covers practical assumptions made in the charging and discharging processes of capacitors in RC circuits.

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