SATHEE: Electrostatics Question 773

Electrostatics Question 773

Question: A conducting disc of radius R rotating about its axis with an angular velocity $ω$ . Then the potential difference between the center of the disk and its edge is (no magnetic field is present)

Options:

A) zero

B) $\frac{m_{e} ω^{2} R^{2}}{2 e}$

C) $\frac{m_{e} ω^{2} R^{3}}{2 e}$

D) $\frac{e m_{e} ω R^{2}}{2}$

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $e E = m_{e} ω^{2} r$

$\Rightarrow \int_{}^{} E d r = \frac{m_{e} ω^{2} r}{e} \int_{0}^{R} r d r$

$\Rightarrow V = \frac{m_{e} ω^{2} R^{2}}{2 e}$

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Electrostatics Question 773

Question: A conducting disc of radius R rotating about its axis with an angular velocity ω . Then the potential difference between the center of the disk and its edge is (no magnetic field is present)

Options:

Answer:

Solution:

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Question: A conducting disc of radius R rotating about its axis with an angular velocity $ω$ . Then the potential difference between the center of the disk and its edge is (no magnetic field is present)