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Which of these mechanisms can be used to produce electromagnetic waves?
- a)point charge oscillating in simple harmonic motion
- b)point charge travelling in a circle at constant velocity
- c)point charge travelling in a straight line with constant velocity
- d)point charge drifting slowly
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Which of these mechanisms can be used to produce electromagnetic waves...
Electromagnetic waves are produced by the acceleration of charged particles. When a charged particle accelerates, it creates a changing electric field, which in turn creates a changing magnetic field. These two fields then interact with each other and propagate away from the source as an electromagnetic wave.
Explanation of options:
a) Point charge oscillating in simple harmonic motion: When a point charge oscillates back and forth in a simple harmonic motion, it accelerates back and forth, creating a changing electric field. This changing electric field then creates a changing magnetic field, which in turn creates an electromagnetic wave.
b) Point charge travelling in a circle at constant velocity: When a point charge travels in a circle at a constant velocity, it is not accelerating. Therefore, it does not create a changing electric field, and hence does not produce electromagnetic waves.
c) Point charge travelling in a straight line with constant velocity: When a point charge travels in a straight line at a constant velocity, it is also not accelerating. Therefore, it does not create a changing electric field, and hence does not produce electromagnetic waves.
d) Point charge drifting slowly: When a point charge drifts slowly, it is not accelerating significantly. Therefore, it does not create a changing electric field, and hence does not produce electromagnetic waves.
Conclusion: Thus, the correct answer is option 'A' as only a point charge oscillating in simple harmonic motion can create a changing electric field and hence produce electromagnetic waves.
Explanation of options:
a) Point charge oscillating in simple harmonic motion: When a point charge oscillates back and forth in a simple harmonic motion, it accelerates back and forth, creating a changing electric field. This changing electric field then creates a changing magnetic field, which in turn creates an electromagnetic wave.
b) Point charge travelling in a circle at constant velocity: When a point charge travels in a circle at a constant velocity, it is not accelerating. Therefore, it does not create a changing electric field, and hence does not produce electromagnetic waves.
c) Point charge travelling in a straight line with constant velocity: When a point charge travels in a straight line at a constant velocity, it is also not accelerating. Therefore, it does not create a changing electric field, and hence does not produce electromagnetic waves.
d) Point charge drifting slowly: When a point charge drifts slowly, it is not accelerating significantly. Therefore, it does not create a changing electric field, and hence does not produce electromagnetic waves.
Conclusion: Thus, the correct answer is option 'A' as only a point charge oscillating in simple harmonic motion can create a changing electric field and hence produce electromagnetic waves.
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Community Answer
Which of these mechanisms can be used to produce electromagnetic waves...
The electromagnetic waves are produced by vibration of an electric charge. This creates a wave which is both as electric and magnetic components. This ways oscillate in perpendicular planes with respect to each other and in a phase.This creates of all electromagnetic waves begin with an oscillating charged particle which creates oscillating electric and magnetic field.
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Which of these mechanisms can be used to produce electromagnetic waves?a)point charge oscillating in simple harmonic motionb)point charge travelling in a circle at constant velocityc)point charge travelling in a straight line with constant velocityd)point charge drifting slowlyCorrect answer is option 'A'. Can you explain this answer?
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