When a 24 V input pulse with a width equal to five time constants is applied to

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Question
When a 24 V input pulse with a width equal to five time constants is applied to an RC integrator, the capacitor charges to
Options
A. 24 V
B. 15.12 V
C. 20.64 V
D. 12 V

Correct Answer

24 V

Time Response of Reactive Circuits problems

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1. In an RL differentiator, when the input pulse goes from its low level to its high level,
Options
A. the inductor prevents a sudden change in voltage
B. the inductor prevents a sudden change in current
C. voltage across the inductor instantly reaches 63% of input voltage
D. voltage across the inductor is zero

2. A steady-state condition is reached when
Options
A. the output voltage reaches the average value of the input voltage
B. the output voltage reaches the input voltage
C. the output voltage reaches approximately 63% of the input voltage
D. the output voltage reaches the effective value of the input voltage

3. In an RC differentiator, the sum of the capacitor voltage and the resistor voltage at any instant
Options
A. must be zero
B. must be equal to the applied voltage
C. is less than the applied voltage but greater than zero
D. cannot be determined

4. In an RC differentiator, the capacitor
Options
A. charges exponentially at a rate depending on the RC time constant
B. charges exponentially at a rate depending on the input voltage
C. charges when the input voltage is decreasing
D. charges to approximately one time constant

5. If the RC time constant of an integrator is increased, as the time constant is increased
Options
A. the capacitor charges more during a pulse and discharges less between pulses
B. the capacitor charges less during a pulse and discharges more between pulses
C. the capacitor charges more during a pulse and discharges more between pulses
D. the capacitor charges less during a pulse and discharges less between pulses

6. To understand how the output voltage is shaped by a differentiator, you must consider
Options
A. the response to the rising pulse edge
B. the response between the rising and falling edges
C. the response to the falling pulse edge
D. all of the above

7. Referring this figure, on the falling edge,
Options
A. the resistor voltage drops to ?5 V and then goes back to zero exponentially
B. the resistor voltage jumps to ?5 V and then goes back to zero exponentially
C. the capacitor voltage remains constant
D. the resistor voltage jumps to +5 V and then decreases exponentially to zero

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