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#1 Class 12 Physics Electric Charges and Fields 2019 Short 3M CBSE
Two point charges q₁ and q₂ are located at points (a, 0, 0) and (0, b, 0) respectively. Find the electric field due to both these charges at the point (0, 0, c).
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#2 Class 12 Physics Electric Charges and Fields 2017 Short 3M CBSE
An electric dipole is placed in a uniform electric field <b>E</b> with its dipole moment <b>p</b> parallel to the field. Find:<br><br> (1) The work done in turning the dipole till its dipole moment points in the direc...
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#3 Class 12 Physics Electric Charges and Fields 2010 Short 2M CBSE
What is the nature of electrostatic force between two point electric charges q₁ and q₂ if (a) q₁ + q₂ &gt; 0 (b) q₁ × q₂ &lt; 0 ?
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#4 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
Two equal balls having equal positive charge q coulombs are suspended by two insulating strings of equal length. What would be the effect on the force when a plastic sheet is inserted between the two?
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#5 Class 12 Physics Electric Charges and Fields 2010 Short 2M CBSE
Compare the electric fields due to a monopole (single charge) and dipole.
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#6 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
Why do the electric field lines never cross each other?
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#7 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
Why do the electrostatic field lines not form closed loops?
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#8 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
Figure shows the field lines of a positive charge. Is the work done by the field in moving a small positive charge from Q to P positive or negative? Give reason.
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#9 Class 12 Physics Electric Charges and Fields 2024 Short 3M CBSE
A thin straight infinitely long conducting wire having charge density λ is enclosed by a cylindrical surface of radius r and length l, its axis coinciding with the length of the wire. Find the expression for the elect...
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#10 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
What is the electric flux through a cube of side 1 cm which encloses an electric dipole?
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#11 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
Define electric dipole moment. Is it a scalar or a vector quantity? What is its SI unit?
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#12 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
What is electrostatic shielding? Give one of its practical applications.
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#13 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
Why should electrostatic field be zero inside a conductor?
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#14 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
Why must electrostatic field at the surface of a charged conductor be perpendicular to every point on it?
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#15 Class 12 Physics Electric Charges and Fields 2024 Long 1M CBSE
<b>Assertion (A):</b> Work done in moving a charge around a closed path in an electric field is always zero.<br><br><b>Reason (R):</b> Electrostatic force is a conservative force.
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#16 Class 12 Physics Electric Charges and Fields 2024 Mcq 1M CBSE
The S.I. unit of electric field E is:
A. N/C
B. V/m
C. Both (a) and (b)
D. C/N
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#17 Class 12 Physics Electric Charges and Fields 2024 Mcq 1M CBSE
Two point charges each equal to 2 mC are 0.5 m apart. If both of them exist inside vacuum, then electrostatic force between them is:
A. 1.44 × 10⁵ N
B. 1.44 × 10⁴ N
C. 1.44 × 10³ N
D. 1.44 × 10² N
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#18 Class 12 Physics Electric Charges and Fields 2024 Mcq 1M CBSE
The electric field at a distance 2 cm from the centre of a hollow spherical conducting shell of radius 4 cm having a charge of 2 × 10⁻³ C on its surface is:
A. Zero
B. 4.5 × 10⁷ N/C
C. 2.25 × 10⁷ N/C
D. 9 × 10⁹ N/C
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#19 Class 12 Physics Electric Charges and Fields 2024 Mcq 1M CBSE
A charge q is placed at the centre of the line joining two equal point charges each equal to +Q. The system of three charges will be in equilibrium, if q is equal to:
A. +Q/2
B. -Q/2
C. +Q/4
D. -Q/4
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#20 Class 12 Physics Electric Charges and Fields 2024 Mcq 1M CBSE
An electric dipole placed in an electric field of intensity 2 × 10⁵ N/C at an angle of 30° experiences a torque equal to 4 N·m. The charge on the dipole of dipole length 2 cm is:
A. 7 µC
B. 8 mC
C. 2 mC
D. 5 mC
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