- [Medium]A parallel-plate capacitor with plate separation 4 mm is fully filled with a dielectric of relative permittivity \(\varepsilon_r = 5\). By what factor...
- [Medium]A parallel-plate capacitor of capacitance 5 μF is charged to a potential of 200 V. After charging, the battery is disconnected. What is the energy sto...
- [Easy]A proton is accelerated from rest through a potential difference of 1500 V in vacuum. What is the final kinetic energy acquired by the proton?...
- [Easy]A parallel-plate capacitor has plate area \(0.02\) m² and plate separation \(2\) mm. What is its capacitance in vacuum?...
- [Medium]Three point charges of \(+2\) μC, \(-4\) μC, and \(+2\) μC are placed in a straight line with equal spacing of 20 cm. What is the net force on the mid...
- [Easy]A point charge of \(+5\) nC is located at the origin. What is the magnitude of the electric field at a point 50 cm from the origin?...
- [Easy]Two identical point charges each of magnitude 6 \(\mu C\) are placed 30 cm apart in vacuum. What is the magnitude of the electrostatic force between t...
- [Easy]What is the electric potential at a point 40 cm from a point charge of \(+8\) nC in vacuum?...
- [Medium]Equipotential surfaces for a uniform electric field directed along the positive x-axis are best described as planes that are oriented in which directi...
- [Easy]A spherical Gaussian surface of radius 15 cm is drawn around a point charge. How does the total electric flux through this surface change if the radiu...
- [Medium]An infinite plane sheet of charge has surface charge density \(\sigma = 4 \times 10^{-6}\) C/m². What is the magnitude of the electric field at a poin...
- [Medium]Three capacitors of capacitances 3 μF, 6 μF, and 9 μF are connected in series across a 90 V battery. What is the charge stored on each capacitor?...
- [Medium]A charge of \(+3\) μC is moved from a point where the electric potential is 200 V to a point where the potential is 500 V. What is the work done by th...
- [Easy]A point charge of +2 μC creates an electric field. What is the magnitude of the field at a distance of 0.1 m from the charge? (k = 9 × 10⁹ N·m²/C²)...
- [Easy]Three capacitors of 2 μF, 3 μF, and 5 μF are connected in parallel. What is the equivalent capacitance?...
- [Easy]What is the electric potential at a distance of 0.3 m from a point charge of +6 nC? (k = 9 × 10⁹ N·m²/C²)...
- [Easy]Two capacitors of 4 μF and 6 μF are connected in series. What is the equivalent capacitance?...
- [Medium]An electric dipole consists of charges +q and -q separated by distance 2a. What is the electric field at a point on the axial line at distance r from ...
- [Easy]What is the work done in moving a charge on an equipotential surface?...
- [Medium]A charge Q is placed at the center of a cube. What is the electric flux through one face of the cube?...
- [Medium]A parallel plate capacitor has plates of area 0.02 m² separated by 1 mm in air. What is its capacitance? (ε₀ = 8.85 × 10⁻¹² F/m)...
- [Easy]Two point charges of +3 μC and +5 μC are separated by a distance of 0.3 m in air. What is the magnitude of the force between them? (k = 9 × 10⁹ N·m²/C...
- [Medium]Work to move charge q between two points at same potential is:...
- [Hard]Inserting dielectric (K>1) fully into isolated charged capacitor (battery disconnected) causes potential difference to:...
- [Medium]Energy density in electric field is (in vacuum):...
- [Easy]Potential energy of two point charges q and q separated by r is:...
- [Hard]Field at center of uniformly charged ring is:...
- [Medium]Inside a charged conductor electrostatic field is:...
- [Easy]Energy stored in capacitor is:...
- [Easy]Electrostatic force between two point charges q1, q2 distance r apart is proportional to:...
- [Easy]Electric field at a point is defined as force per unit:...
- [Easy]Gauss's law relates flux through closed surface to:...
- [Easy]Potential at distance r from point charge q (zero at infinity) is:...
- [Medium]Electric field lines intersect equipotential surfaces at:...
- [Easy]Capacitance C defined as:...
- [Hard]Two capacitors C and 2C in series net capacitance is:...
- [Easy]Potential difference between plates separated by d in uniform field E is:...
- [Easy]The electric potential at the centre of a charged hollow metal sphere is:...
- [Easy]A charge q is placed at the center of a cube of side a. The electric flux passing through one face of the cube is:...
- [Medium]Two point charges +q and -4q are placed at x=0 and x=L respectively. At what point on the x-axis is the electric field zero?...
- [Medium]A parallel plate capacitor has capacitance C. If a dielectric slab of dielectric constant K is inserted filling half the space between plates parallel...