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LED lights of chargers glow even after it is switched off. Which of the following causes this situation?
- a)LC Oscillations
- b)Phasors
- c)Power of the AC circuit
- d)Eddy currents
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
LED lights of chargers glow even after it is switched off. Which of th...
This situation is caused due to LC Oscillations. These circuits consist capacitors and inductors, thus the energy keeps oscillating in the circuit even after the electric connection is disconnected. The combination of a capacitor and an inductor constitutes an LC oscillator circuit.
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LED lights of chargers glow even after it is switched off. Which of th...
Reason: LC Oscillations
When the LED lights of chargers continue to glow even after they are switched off, the most likely cause is LC oscillations. LC oscillations occur when an inductor (L) and a capacitor (C) are present in a circuit.
Explanation:
1. LC Circuit:
An LC circuit consists of an inductor (L) and a capacitor (C) connected in parallel or series. These two components store energy in different forms. The inductor stores energy in the form of a magnetic field, while the capacitor stores energy in the form of an electric field.
2. Energy Storage and Discharge:
When a current flows through the circuit, energy is stored in the magnetic field of the inductor and the electric field of the capacitor. When the current stops flowing, the stored energy is discharged back into the circuit. This discharge can cause the LED lights to continue glowing even after the charger is switched off.
3. Inductor Behavior:
When the charger is switched off, the current through the circuit starts to decrease. However, the inductor opposes any change in current by generating a back electromotive force (EMF) proportional to the rate of change of current. This EMF can keep the current flowing for a short period even after the charger is turned off.
4. Capacitor Behavior:
The capacitor, on the other hand, tries to maintain a constant voltage across its terminals. As the current through the circuit decreases, the voltage across the capacitor remains relatively constant due to its energy storage. This constant voltage can keep the LED lights illuminated even when the charger is switched off.
5. LC Oscillations:
The combination of the inductor and capacitor in the circuit can lead to oscillations, where energy is continuously exchanged between the magnetic and electric fields. These oscillations can cause the LED lights to glow even after the charger is turned off.
Conclusion:
In conclusion, the LED lights of chargers continue to glow even after they are switched off due to LC oscillations in the circuit. The inductor and capacitor in the circuit store and discharge energy, causing the LED lights to stay illuminated.
When the LED lights of chargers continue to glow even after they are switched off, the most likely cause is LC oscillations. LC oscillations occur when an inductor (L) and a capacitor (C) are present in a circuit.
Explanation:
1. LC Circuit:
An LC circuit consists of an inductor (L) and a capacitor (C) connected in parallel or series. These two components store energy in different forms. The inductor stores energy in the form of a magnetic field, while the capacitor stores energy in the form of an electric field.
2. Energy Storage and Discharge:
When a current flows through the circuit, energy is stored in the magnetic field of the inductor and the electric field of the capacitor. When the current stops flowing, the stored energy is discharged back into the circuit. This discharge can cause the LED lights to continue glowing even after the charger is switched off.
3. Inductor Behavior:
When the charger is switched off, the current through the circuit starts to decrease. However, the inductor opposes any change in current by generating a back electromotive force (EMF) proportional to the rate of change of current. This EMF can keep the current flowing for a short period even after the charger is turned off.
4. Capacitor Behavior:
The capacitor, on the other hand, tries to maintain a constant voltage across its terminals. As the current through the circuit decreases, the voltage across the capacitor remains relatively constant due to its energy storage. This constant voltage can keep the LED lights illuminated even when the charger is switched off.
5. LC Oscillations:
The combination of the inductor and capacitor in the circuit can lead to oscillations, where energy is continuously exchanged between the magnetic and electric fields. These oscillations can cause the LED lights to glow even after the charger is turned off.
Conclusion:
In conclusion, the LED lights of chargers continue to glow even after they are switched off due to LC oscillations in the circuit. The inductor and capacitor in the circuit store and discharge energy, causing the LED lights to stay illuminated.
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LED lights of chargers glow even after it is switched off. Which of the following causes this situation?a)LC Oscillationsb)Phasorsc)Power of the AC circuitd)Eddy currentsCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about LED lights of chargers glow even after it is switched off. Which of the following causes this situation?a)LC Oscillationsb)Phasorsc)Power of the AC circuitd)Eddy currentsCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for LED lights of chargers glow even after it is switched off. Which of the following causes this situation?a)LC Oscillationsb)Phasorsc)Power of the AC circuitd)Eddy currentsCorrect answer is option 'A'. Can you explain this answer?.
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