Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > A square wave is fed to an R-C circuit. Thena...
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A square wave is fed to an R-C circuit. Then
- a)voltage across R is square and across C is not square
- b)voltage across C is square and across R is not square
- c)voltage across both R & C is square
- d)voltage across both R & C is not square
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
A square wave is fed to an R-C circuit. Thena)voltage across R is squa...
**Explanation:**
The R-C circuit consists of a resistor (R) and a capacitor (C) connected in series. When a square wave is fed to this circuit, the voltage across each component will be affected differently.
**Voltage across the Resistor (R):**
- The resistor is a passive element that simply resists the flow of current. It does not store or release energy like a capacitor.
- When a square wave is applied, the resistor will allow the flow of current without any significant change.
- As a result, the voltage across the resistor will closely follow the input square wave, maintaining its square waveform.
**Voltage across the Capacitor (C):**
- The capacitor is an active element that can store and release electrical charge over time.
- When a square wave is applied, the capacitor will charge and discharge according to the changes in the input waveform.
- At the rising edge of the square wave, the capacitor will start charging, causing the voltage across it to rise gradually.
- At the falling edge of the square wave, the capacitor will start discharging, causing the voltage across it to decrease gradually.
- As a result, the voltage across the capacitor will not maintain a square waveform like the input. It will exhibit a more gradual change, resembling a curve.
**Conclusion:**
Based on the behavior of the R-C circuit, the correct answer is option D. The voltage across both the resistor and the capacitor will not be square. The voltage across the resistor will maintain a square waveform, while the voltage across the capacitor will exhibit a more gradual change.
The R-C circuit consists of a resistor (R) and a capacitor (C) connected in series. When a square wave is fed to this circuit, the voltage across each component will be affected differently.
**Voltage across the Resistor (R):**
- The resistor is a passive element that simply resists the flow of current. It does not store or release energy like a capacitor.
- When a square wave is applied, the resistor will allow the flow of current without any significant change.
- As a result, the voltage across the resistor will closely follow the input square wave, maintaining its square waveform.
**Voltage across the Capacitor (C):**
- The capacitor is an active element that can store and release electrical charge over time.
- When a square wave is applied, the capacitor will charge and discharge according to the changes in the input waveform.
- At the rising edge of the square wave, the capacitor will start charging, causing the voltage across it to rise gradually.
- At the falling edge of the square wave, the capacitor will start discharging, causing the voltage across it to decrease gradually.
- As a result, the voltage across the capacitor will not maintain a square waveform like the input. It will exhibit a more gradual change, resembling a curve.
**Conclusion:**
Based on the behavior of the R-C circuit, the correct answer is option D. The voltage across both the resistor and the capacitor will not be square. The voltage across the resistor will maintain a square waveform, while the voltage across the capacitor will exhibit a more gradual change.
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A square wave is fed to an R-C circuit. Thena)voltage across R is square and across C is not squareb)voltage across C is square and across R is not squarec)voltage across both R C is squared)voltage across both R C is not squareCorrect answer is option 'D'. Can you explain this answer?
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