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SubjectsPhysics
गाउस का नियम और इसके अनुप्रयोग
In this Class 12 Physics topic from Chapter 1, Electric Charges and Fields, students learn how electric flux is related to the net charge enclosed by a closed surface through Gauss’s law. The topic develops the idea of Gaussian surfaces, uses symmetry to simplify electric-field calculations, and applies the law to charged spherical shells, uniformly charged spheres, infinite line charges, and plane sheets. It also helps students understand the electric field inside conductors and choose suitable surfaces for solving electrostatic problems.
TOPIC PRACTICE
Up to 11 questions from this page. Select your focus, then start.
Step 1: Gauss's law remains true for every closed surface. Step 2: But in an asymmetric distribution, field magnitude and direction can be complex on the surface. Step 3: Therefore calculation is not simple.
Step 1: Gauss's law gives total flux. Step 2: To find field, it is helpful to take field out simply over the surface. Step 3: Therefore symmetry is very useful.
Step 1: Field at a conductor surface is related to surface charge density. Step 2: Sharp regions can have higher surface charge density. Step 3: Hence the electric field can be stronger there.
Step 1: Total flux depends on net enclosed charge. Step 2: Changing the position of charge inside does not change its value. Step 3: Therefore total flux remains unchanged.
Step 1: In electrostatic equilibrium, electric field inside any conductor is zero. Step 2: Spherical shape only makes symmetry simpler. Step 3: Hence field inside a spherical conductor is zero.
Step 1: In the conducting material, field is zero in electrostatic equilibrium. Step 2: An empty cavity has no internal charge source. Step 3: Therefore the field inside the cavity is zero.
Step 1: In electrostatic equilibrium, excess charge resides on the conductor surface. Step 2: A surface entirely inside the conducting material does not enclose that surface charge. Step 3: Hence net enclosed charge is zero.
Step 1: The sign of outward flux is linked to the sign of enclosed charge. Step 2: Negative flux means net field lines are inward. Step 3: Therefore net enclosed charge is negative.
Step 1: Point charge field decreases as inverse square of distance. Step 2: Line charge field decreases inversely with distance. Step 3: Infinite sheet field is independent of distance.
Step 1: Gauss's law connects total flux with a closed surface. Step 2: A Gaussian surface may be imaginary and can have many shapes. Step 3: But it must be closed.
Step 1: Gauss's law counts only net charge enclosed by the closed surface. Step 2: Charges outside the surface do not change total flux. Step 3: Always check which charges are inside first.
QUIZ COMPLETE
