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
A system has two charges qA = 2.5 × 10−7 C and qB = −2.5 × 10−7 C located at points A: (0, 0, −15 cm) and B: (0, 0, +15 cm), respectively. What are the total charge and electric dipole moment of the system?
An electric dipole of length 2 cm, when placed with its axis making an angle of 60° with a uniform electric field, experiences a torque of \[8\sqrt{3}\] Nm. Calculate the potential energy of the dipole, if it has a charge \[\pm\] 4 nC.
An electric dipole is placed in an electric field generated by a point charge.
On the axis and on the equator of an electric dipole for all points ____________.
Electric field on the axis of a small electric dipole at a distance r is E1 and at a distance of 2r on its perpendicular bisector, the electric field is E2. Then the ratio E2: E1 is ______.
Electric dipole consists of two charges of magnitude 0.1 µC separated by a distance of 2 cm. The dipole is in 5 an external field of 105 N/C. What maximum torque does the field exert on the dipole?
The electric field in a region is given by `vec"E" = 2/5"E"_0hat"i"+3/5"E"_0hat"j"` with `"E"_0 = 4.0xx10^3 "N"/"C"`. The flux of this field through a rectangular surface area 0.4 m2 parallel to the Y - Z plane is ______ Nm2C-1.
In an electric dipole, what is the locus of a point having zero potential?
