TS EAMCET · Physics · Magnetic Effects of Current
Consider the charged cylindrical capacitor. The magnitude of electric field in its annular region
- A Varies as where is the distance from its axis
- B Zero
- C Is same throughout and
- D Varies as where is the distance from its axis
Answer & Solution
Correct Answer
(A) Varies as where is the distance from its axis
Step-by-step Solution
Detailed explanation
Considering the annular region of the cylindrical capacitor as the Gaussian surface, we have, E×A=Qε. The surface area is given by, A=2πr×L,⇒E×2πr×L=Qε. Considering Q’as the charge per unit length, we get, Q'=QL⇒E=Q'2πrε⇒E∝1r.
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