Electric flux and Gauss's law applications
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See all →- If _S E· dS=0 over a surface, then : Answer: 2. the number of flux lines entering the surface must be equal to the number of flux lines leaving it. oint vec E· dvec S = q_enc/ε₀... 1
- A spherical conductor of radius 10 cm has a charge of 3.2×10^-7 C distributed uniformly. What is the magnitude of electric field at a point 15 cm from the centre of the sphere ?≤ft(1/4πε_0 = 9×10^9\ N m^2/C^2) Answer: 2. 1.28×10⁵ N/C Outside a uniformly charged sphere, the field is the same as that of a point charge at the centre. E=1/4πε₀Q/r²=frac... 1
- A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre : Answer: 2. zero as r increases for r < R, decreases as r increases for r > R For a uniformly charged hollow sphere, by Gauss's law: Inside (... 1