Q26.The volume charge density of a sphere of radius 6 m is 2 μC cm-3. The number of lines of force per unit surface area coming out from the surface of the sphere is _____ × 1010 N C-1 . [Given : Permittivity of vacuum 𝜖0 = 8 . 85 × 10-12C2 N-1 - m-2]
What This Question Tests
This question tests the application of Gauss's Law to find the total electric flux and relate it to the electric field (number of lines of force per unit area) at the surface of a uniformly charged sphere.
Concepts Tested
Formulas Used
Φ = Q_enc / ε₀
Φ = E * A
Q = ρ * V
📚 NCERT Sections This Tests
1.19 — A Point Charge Causes An Electric Flux Of –1.0 × 103 Nm2/C To Pass
Physics Class 11 · Chapter 1
1.19 A point charge causes an electric flux of –1.0 × 103 Nm2/C to pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. (a) If the radius of the Gaussian surface were doubled, how much flux would pass through the surface? (b) What is the value of the point charge?
1.18 — A Point Charge Of 2.0 Mc Is At The Centre Of A Cubic Gaussian
Physics Class 11 · Chapter 1
1.18 A point charge of 2.0 mC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?
2.4 — A Spherical Conductor Of Radius 12 Cm Has A Charge Of 1.6 × 10–7C
Physics Class 11 · Chapter 2
2.4 A spherical conductor of radius 12 cm has a charge of 1.6 × 10–7C distributed uniformly on its surface. What is the electric field (a) inside the sphere (b) just outside the sphere (c) at a point 18 cm from the centre of the sphere?
📋 Question Details
- Chapter
- Electrostatics
- Topic
- Gauss's Law
- Year
- 2022
- Shift
- 25 Jul Shift 1
- Q Number
- Q26
- Type
- Numerical
- NCERT Ref
- Class 12 Physics Ch 1: Electric Charges and Fields
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