NEET 2008
- Exam
- NEET
- Year
- 2008
- Subject
- Physics
- Chapter
- Electrostatics
NEET 2008 · Physics · Electrostatics
A thin conducting ring of radius R is given a charge +Q . The...
A thin conducting ring of radius is given a charge . The electric field at the centre of the ring due to the charge on the part of the ring is . The electric field at the centre due to the charge on the part of the ring is
Options
- A along
- BE along
- C along
- D along
Correct answer
B. E along
Step-by-step solution
Key Idea: It is given that the ring is conducting. As the ring is conducting, so electric field at its centre is zero, ie,
\overrightarrow{\mathbf{E}_{\text{total }}=0\begin{aligned}
\overrightarrow{\mathbf{E}_{A K B}+\overrightarrow{\mathbf{E}_{A C D B} & =0 \\
\overrightarrow{\mathbf{E}_{A C D B} & =-\overrightarrow{\mathbf{E}_{A K B} \\
\overrightarrow{\mathbf{E}_{A C D B} & =-\overrightarrow{\mathbf{E}} \text{ (along } K O \text{ ) }
\end{aligned}$ of the ring is along .
lternative :
The fields at due to A C and B DC DO KE$ due to A K B.