NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Electromagnetic Waves
NEET · Physics · Electromagnetic Waves
Given below are two statements: Assertion (A): An electron moving...
Given below are two statements:
Assertion (A): An electron moving with a constant velocity in a straight line does not produce an electromagnetic wave.
Reason (R): A charge moving with a constant velocity produces both an electric field and a magnetic field in the surrounding space.
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion (A): An electron moving with a constant velocity in a straight line does not produce an electromagnetic wave.
Reason (R): A charge moving with a constant velocity produces both an electric field and a magnetic field in the surrounding space.
In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A)
- BBoth Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A)
- CAssertion (A) is true and Reason (R) is false
- DAssertion (A) is false and Reason (R) is true
Correct answer
B. Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A)
Step-by-step solution
Assertion (A) is true because an electromagnetic wave is produced only by an accelerating or oscillating charge. An electron moving with a constant velocity has zero acceleration and thus cannot radiate electromagnetic waves.
Reason (R) is also true because a moving charge constitutes a current, which produces a magnetic field, while its intrinsic charge produces an electric field.
However, Reason (R) does not explain Assertion (A). The correct explanation for the Assertion is that the generation of electromagnetic waves requires time-varying electric and magnetic fields that can regenerate each other, which is only possible when the charge is accelerating. Thus, both (A) and (R) are true, but (R) is not the correct explanation of (A).
Answer: Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A)
Reason (R) is also true because a moving charge constitutes a current, which produces a magnetic field, while its intrinsic charge produces an electric field.
However, Reason (R) does not explain Assertion (A). The correct explanation for the Assertion is that the generation of electromagnetic waves requires time-varying electric and magnetic fields that can regenerate each other, which is only possible when the charge is accelerating. Thus, both (A) and (R) are true, but (R) is not the correct explanation of (A).
Answer: Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A)