Advertisements
Advertisements
प्रश्न
An electric dipole is placed at an angle of 30° with an electric field intensity of 2 × 105 N/C. It experiences a torque equal to 4 Nm. The charge on the dipole, if the dipole length is 2 cm, is ______.
विकल्प
7 μC
8 mC
2 mC
5 mC
उत्तर
An electric dipole is placed at an angle of 30° with an electric field intensity of 2 × 105 N/C. It experiences a torque equal to 4 Nm. The charge on the dipole, if the dipole length is 2 cm, is 2 mC.
Explanation:
We know,
τ = pE.sinθ
∴ p = `tau/("E".sintheta)`
q × 2l = `4/(2 xx 10^5 xx 0.5)` ............(∵ p = q × 2l)
∴ q = `4/(2 xx 10^5 xx 0.5 xx 0.02)` ....(∵ 2l = 0.02m given)
= 2 × 10-3 C
q = 2 mC
APPEARS IN
संबंधित प्रश्न
Depict the orientation of the dipole in (i) stable, (ii) unstable equilibrium in a uniform electric field.
Derive the expression for the electric potential due to an electric dipole at a point on its axial line.
Derive an expression for the intensity of electric field at a point in broadside position or on [4)
an equatorial line of an electric dipole.
Find the resultant electric field due to an electric dipole of dipole moment, 2aq, (2a being the separation between the charges ±± q) at a point distant 'x' on its equator.
Three charges are arranged on the vertices of an equilateral triangle, as shown in the figure. Find the dipole moment of the combination.
Answer the following question.
What is the unit of dipole moment?
A short electric dipole bas a dipole moment of 16 x 10-9 C m. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of 60° with the dipole axis is: ____________. `(1/(4piepsilon_0) = 9 xx 10^9 "Nm"^2// "C"^2)`
An electric dipole is placed at an angle of 30° to a non-uniform electric field. The dipole will experience ________.
