A thin plastic rod is bent into a circular ring of radius R. It is uniformly charged with…
Physics · Class 12 · CBSE — Electric Charges and Fields
A thin plastic rod is bent into a circular ring of radius R. It is uniformly charged with charge density \(\lambda\) . The magnitude of the electric field at its centre is:
- \(\frac{\lambda}{2 \varepsilon_0 R}\)
- Zero
- \(\frac{\lambda}{4 \pi \varepsilon_0 \mathrm{R}}\)
- \(\frac{\lambda}{4 \varepsilon_0 \mathrm{R}}\)
Answer
(B) Zero
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