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Test: Electric Dipole(30 Oct) - JEE MCQ
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Test: Electric Dipole(30 Oct) - Question 1
The electric intensity due to a dipole of length 
and having a charge of 
, at a point on the axis at a distance 
from one of the charges in air, is
and having a charge of , at a point on the axis at a distance from one of the charges in air, is
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 1
Test: Electric Dipole(30 Oct) - Question 2
Intensity of an electric field (E) depends on distance r, due to a dipole, is related as
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 2
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Test: Electric Dipole(30 Oct) - Question 3
If the dipole of moment 2.57 × 10−17 Cm is placed into an electric field of magnitude 3.0 × 104 N/C such that the fields lines are aligned at 30∘ with the line joining P to the dipole, what torque acts on the dipole?
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 3
Test: Electric Dipole(30 Oct) - Question 4
An electric dipole is placed at an angle of 
with an electric field of intensity 
, It experiences a torque of 
. Calculate the charge on the dipole if the dipole length is 
.
with an electric field of intensity , It experiences a torque of . Calculate the charge on the dipole if the dipole length is .
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 4
Test: Electric Dipole(30 Oct) - Question 5
On decreasing the distance between the two charges of a dipole which is perpendicular to electric field and decreasing the angle between the dipole and electric field, the torque on the dipole
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 5
on decreasing the distance between the two charges, and on decreasing angle 
between the dipole and electric field, 
decreases therefore torque decreases.
Test: Electric Dipole(30 Oct) - Question 6
Two point dipoles of dipole moment p1 and p2 are at a distance x from each other and 
. The force between the dipoles is:
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 6
Test: Electric Dipole(30 Oct) - Question 7
An electric dipole, consisting of two opposite charges of 
each separated by a distance 
is placed in an electric field of 
. Torque acting on the dipole is
each separated by a distance is placed in an electric field of . Torque acting on the dipole is
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 7
, Distance 
and electric field (E) 
. Torque 
q.d.
Test: Electric Dipole(30 Oct) - Question 8
In the figure, the net electric flux through the area 
when the system is in air. On immersing the system in water the net electric flux through the area
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 8
decreases inside water, therefore flux 
also decreases.
Test: Electric Dipole(30 Oct) - Question 9
A charge 
is placed at the centre of the open end of a cylindrical vessel. The flux of the electric field through the surface of the vessel is
is placed at the centre of the open end of a cylindrical vessel. The flux of the electric field through the surface of the vessel is
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 9
is placed at the center of open end of a cylindrical vessel then only half of the charge will contribute to the flux, because half will lie inside the surface and half will lie outside the surface. so, flux through the surface of vessel is 
Test: Electric Dipole(30 Oct) - Question 10
A hollow cylinder has a charge 
coulomb within it. If 
is the electric flux in units of voltmeter associated with the curved surface 
, the flux linked with the plane surface 
in units of voltmeter will be
Detailed Solution for Test: Electric Dipole(30 Oct) - Question 10
,
is the total charge. As shown in the figure, flux associated with the curved surface 
is 
and 
be 
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