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Electric Charges And Fields

Question

An electric dipole with dipole moment 4 x 10^–9 C m is aligned at 30° with the direction of a uniform electric field of magnitude 5 x 10⁴ NC–¹. Calculate the magnitude of the torque acting on the dipole.

Solution

Given,

$Dipole moment, p = 4 \times 10^{- 9} Cm; θ = 30 ° Eelectric field, E = 5 \times 10^{4} {NC}^{- 1}$

Torque is given by

   $τ = p \times \vec{E} = p . E \sin θ = 4 \times 10^{- 9} \times 5 \times 10^{4} \times \sin 30 °$

   $τ = 4 \times 10^{- 9} \times 5 \times 10^{4} \times \frac{1}{2}$
$τ = 10^{- 4} Nm$

Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point?

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Electric Charges And Fields

An electric dipole with dipole moment 4 x 10^–9 C m is aligned at 30° with the direction of a uniform electric field of magnitude 5 x 10⁴ NC–¹. Calculate the magnitude of the torque acting on the dipole.

Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

Electric Charges And Fields

An electric dipole with dipole moment 4 x 10–9 C m is aligned at 30° with the direction of a uniform electric field of magnitude 5 x 104 NC–1. Calculate the magnitude of the torque acting on the dipole.

Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?b) Explain why two field lines never cross each other at any point?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

An electric dipole with dipole moment 4 x 10^–9 C m is aligned at 30° with the direction of a uniform electric field of magnitude 5 x 10⁴ NC–¹. Calculate the magnitude of the torque acting on the dipole.

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point?