Electric Charges and Fields
CBSE Class 12 Physics · every board question from this chapter, 2023–2026 · 19 of them repeated across years
- Two small identical metallic balls having charges q and - 2q are kept far at a separation r. They are brought in contact and then…2026
- An electric dipole P=2 qa i is placed in x-y plane, centred at the origin. Let E 1 and E 2 be the magnitudes of electric field at…2026
- Two point charges - Q and Q are located at points (d, 0) and (0, d) respectively, in x-y plane. The electric field E at the…2026
- An electron is moving with velocity v 0 i. If a uniform electric field E=E 0 j is set up in the region, the electron will:2026
- The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges,…2026
- An electric dipole consists of two point charges +1 μ C and -1 μ C, held 10 cm apart. It is subjected to a uniform electric field…2026asked 3×
- Using Gauss's law, deduce an experession for electric field at a point due to a uniformly charged infinite plane thin sheet. Two…2026asked 3×
- Two point charges q 1=2 · 5 × 10^-7 C and q 2=-2 · 5 × 10^-7 C are located at points (0, 0, - 15 cm) and (0, 0, 15 cm)…2026
- An electric dipole consists of two point charges q and -q separated by a distance 2a. Derive an expression for the electric field…2026asked 3×
- An electric dipole of dipole moment 1.0 × 10^-12 Cm lies along x -axis. An electric field of magnitude 2.0 × 10^4 NC^-1 is…2025
- Consider two identical dipoles D 1 and D 2. Charges -q and q of dipole D 1 are located at (0,0) and (a, 0) and that of dipole D 2…2025
- A body acquires charge 8.0 × 10^-12 C. The mass of the body:2025
- Two charges -q each are placed at the vertices A and B of an equilateral triangle ABC. If M is the mid-point of AB, the net…2025
- Two point charges Q and -q are held ' r ' distance apart in free space. A uniform electric field E is applied in the region…2025
- Figure shows variation of Coulomb force (F) acting between two point charges with 1/(r^2), r being the separation between the two…2025
- A charge Q is fixed in position. Another charge q is brought near charge Q and released from rest. Which of the following graphs…2025
- Two identical point charges are placed at the two vertices A and B of an equilateral triangle of side l. The magnitude of the…2025
- The electric field at a point in a region is given by E=α r r ^3, where α is a constant and r is the distance of the point from…2025asked 2×
- Which one of the following statements is correct? Electric field due to static charges is2025asked 3×
- Which of the following is an electrical conductor at room temperature?2025asked 3×
- An electric field E given by: exists in a region. A right circular cylinder of length 10 cm and radius 2 cm, is placed in the…2025
- Two small solid metal balls A and B of radii R and 2 R having charge densities 2 σ and 3 σ respectively are kept far apart. Find…2025asked 3×
- (i) A small conducting sphere A of radius r charged to a potential V, is enclosed by a spherical conducting shell B of radius R.…2025asked 3×
- (i) The electric field in a region is given by E=40 x i N / C. Find the amount of work done in taking a unit positive charge from…2025asked 3×
- (i) Two point charges +q and -q are held at (a, 0) and ( -a, 0 ) in x-y plane. Obtain an expression for the net electric field…2025asked 3×
- Coulomb force F versus (1/(r^2)) graphs for two pairs of point charges ( q 1 and q 2 ) and ( q 2 and q 3 ) are shown in the…2024
- A thin plastic rod is bent into a circular ring of radius R. It is uniformly charged with charge density λ. The magnitude of the…2024asked 3×
- An electric dipole of dipole moment p is kept in a uniform electric field → E. The amount of work done to rotate it from the…2024
- Three point charges, each of charge q are placed on vertices of a triangle ABC, with AB=AC=5 L, BC=6 L. The electrostatic…2024
- Three small charged spheres X, Y and Z carrying charges +q,-q and +q respectively are placed equidistant from each other, as…2024
- The Coulomb force (F) versus (1 / r^2) graphs for two pairs of point charges (q 1. and q 2 ) and ( q 2 and q 3 ) are shown in…2024
- Two identical small conducting balls B 1 and B 2 are given -7 pC and +4 pC charges respectively. They are brought in contact with…2024
- A charged sphere of radius r has surface charge density σ. The electric field on its surface is E. If the radius of the sphere is…2024
- An infinite long straight wire having a charge density λ is kept along y^′ y axis in x -y plane. The Coulomb force on a point…2024
- Assertion: Equal amount of positive and negative charges are distributed uniformly on two halves of a thin circular ring as shown…2024asked 3×
- Four point charges of 1 μ C,-2 μ C, 1 μ C and -2 μ C are placed at the corners A, B, C and D respectively, of a square of side 30…2024asked 3×
- A cube of side 0 · 1 m is placed, as shown in the figure, in a region where electric field E=500 × i exists. Here x is in meters…2024
- Define the term 'electric flux' and write its dimensions. A plane surface, in shape of a square of side 1 cm is placed in an…2024
- A charge Q is placed at the centre of a cube. The electric flux through one if its face is2023
- An electric dipole of length 2 cm is placed at an angle of 30^° with an electric field 2 × 10^5 N / C. If the dipole experiences…2023asked 2×
- An electron experiences a force (1 · 6 × 10^-16 N) i in an electric field E. The electric field E is:2023
- The magnitude of the electric field due to a point charge object at a distance of 4.0 m is 9 N / C. From the same charged object…2023
- A point P lies at a distance x from the mid point of an electric dipole on its axis. The electric potential at point P is…2023
- An infinitely long uniformly charged wire produces an electric field of 18 × 10^4 NC^-1 at a distance of 1 · 0 cm. The linear…2023
- An isolated point charge particle produces an electric field E at a point 3 m away from it. The distance of the point at which…2023
- A point charge q is kept at a distance r from an infinitely long straight wire with charge density λ. The magnitude of the…2023
- An electric dipole of dipole moment 2 × 10^-8 C-m in a uniform electric field experiences a maximum torque of 6 × 10^-4 N-m. The…2023
- A point charge situated at a distance ' r ' from a short electric dipole on its axis, experiences a force F. If the distance of…2023asked 3×
- Two identical dipoles are arranged in x-y plane as shown in the figure. Find the magnitude and the direction of net electric…2023
- Use Gauss's law to obtain the expression for electric field due to a thin infinitely long straight uniformly charged wire.2023
- Depict the orientation of an electric dipole in stable and unstable equilibrium in an external uniform electric field. Write the…2023
- An electric dipole of dipole moment ( p) is kept in a uniform electric field E. Show graphically the variation of torque acting…2023
- Use Gauss's law to obtain the expression for electric field due to a uniformly charged infinite plane thin sheet.2023
- Twelve negative charges of same magnitude are equally spaced and fixed on the circumference of a circle of radius R as shown in…2023
- (i) Define electric flux and write its SI unit. (ii) Use Gauss' law to obtain the expression for the electric field due to a…2023asked 3×
- (i) Use Gauss' law to obtain an expression for the electric field due to an infinitely long thin straight wire with uniform…2023asked 3×
- (i) State Coulomb's law in electrostatics and write it in vector form, for two charges. (ii) 'Gauss's law is based on the…2023asked 3×
- Electrostatics deals with the study of forces, fields and potentials arising from static charges. Force and electric field, due…2023asked 3×
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