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 ______.
पर्याय
7 μC
8 mC
2 mC
5 mC
Advertisements
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
An electric dipole of length 4 cm, when placed with its axis making an angle of 60° with a uniform electric field, experiences a torque of `4sqrt3`Nm. Calculate the potential energy of the dipole, if it has charge ±8 nC
(i)Obtain the expression for the torque `vecτ` experienced by an electric dipole of dipole moment `vecP` in a uniform electric field, `vecE` .
(ii) What will happen if the field were not uniform?
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.
An electric dipole of moment p is placed parallel to the uniform electric field. The amount of work done in rotating the dipole by 90° is ____________.
In an electric dipole, what is the locus of a point having zero potential?
At a point P on the equatorial line of a dipole, both charges are at equal distances. This distance is expressed as:
In the derivation of the electric field at the equatorial line, why do the components perpendicular to the dipole axis cancel out?
A configuration consists of charges +q, −2q, and +q at the vertices of an equilateral triangle with side length 2l. Treating this as a combination of two dipoles, what is the net dipole moment?
