NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Electromagnetic Waves
NEET · Physics · Electromagnetic Waves
Given below are two statements: one is labelled as Assertion (A)...
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): For a charging circular parallel plate capacitor, the induced magnetic field at the central axis connecting the plates is zero.
Reason (R): The displacement current density is zero at the central axis of the capacitor.
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion (A): For a charging circular parallel plate capacitor, the induced magnetic field at the central axis connecting the plates is zero.
Reason (R): The displacement current density is zero at the central axis of the capacitor.
In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
C. (A) is correct but (R) is not correct
Step-by-step solution
Assertion (A) is correct: According to the Ampere-Maxwell law, . At the central axis (), an Amperian loop encloses zero area, meaning the enclosed displacement current is zero. Hence, the induced magnetic field is zero.
Reason (R) is incorrect: The changing electric field is uniform across the entire area of the plates. Therefore, the displacement current density is uniform and non-zero everywhere between the plates, including at the central axis.
Thus, (A) is correct but (R) is not correct.
Answer: (A) is correct but (R) is not correct
Reason (R) is incorrect: The changing electric field is uniform across the entire area of the plates. Therefore, the displacement current density is uniform and non-zero everywhere between the plates, including at the central axis.
Thus, (A) is correct but (R) is not correct.
Answer: (A) is correct but (R) is not correct