SATHEE: Electrostatics Question 714

Electrostatics Question 714

Question: A pendulum bob of mass m carrying a charge q is at rest with its string making and angle $θ$ with the vertical in a uniform horizontal electric field E. The tension in the string is

Options:

A) $\frac{m g}{\sin θ} and \frac{q E}{\cos θ}$

B) $\frac{m g}{\cos θ} and \frac{q E}{\sin θ}$

C) $\frac{m g}{\cos θ} and \frac{q E}{\sin θ}$

D) $\frac{m g}{q E}$

Show Answer

Answer:

Correct Answer: B

Solution:

[b] In equilibrium,

$T \cos θ = m g$ ….(1)

$T \sin θ = q E$ ….(2)

From (1), $T = \frac{m g}{\cos θ}$ From (2), $T = \frac{q E}{\sin θ}$

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Electrostatics Question 714

Question: A pendulum bob of mass m carrying a charge q is at rest with its string making and angle θ with the vertical in a uniform horizontal electric field E. The tension in the string is

Options:

Answer:

Solution:

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Question: A pendulum bob of mass m carrying a charge q is at rest with its string making and angle $θ$ with the vertical in a uniform horizontal electric field E. The tension in the string is