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Important formulas of electric field in electrostatics Video Lecture | Basic Physics for IIT JAM

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FAQs on Important formulas of electric field in electrostatics Video Lecture - Basic Physics for IIT JAM

1. What is the formula for electric field due to a point charge?
Ans. The formula for electric field due to a point charge is given by Coulomb's Law, which states that the electric field (E) created by a point charge (Q) at a distance (r) from it is given by E = kQ/r^2, where k is the electrostatic constant.
2. How do you calculate the electric field between two parallel plates?
Ans. The electric field between two parallel plates is calculated by dividing the potential difference (V) between the plates by the distance (d) separating them. Mathematically, it can be expressed as E = V/d.
3. What is the formula for electric field due to a uniformly charged ring?
Ans. The formula for electric field due to a uniformly charged ring at a point on the axis of the ring is given by E = (kQz)/(z^2 + R^2)^(3/2), where Q is the charge on the ring, z is the distance between the point and the center of the ring, R is the radius of the ring, and k is the electrostatic constant.
4. How can electric field be calculated using Gauss's Law?
Ans. Electric field can be calculated using Gauss's Law by integrating the electric field over a closed surface and equating it to the total charge enclosed by that surface divided by the permittivity of the medium. Mathematically, it can be expressed as ∮ E · dA = Qenc/ε0, where E is the electric field, dA is the area vector, Qenc is the total charge enclosed by the surface, and ε0 is the permittivity of free space.
5. What is the formula for electric field due to a uniformly charged sphere?
Ans. The formula for electric field due to a uniformly charged sphere at a point outside the sphere is given by E = (kQ)/r^2, where Q is the charge on the sphere, r is the distance between the center of the sphere and the point, and k is the electrostatic constant. Inside the sphere, the electric field is zero.
210 videos|156 docs|94 tests
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