# 5 cm concentric with the wire is a long thick

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Unformatted text preview: cting hollow sphere. How much charge will be induced on the Q inner and outer surfaces of the sphere? outer A) inner = –Q, outer = +Q Qinner B) inner = –Q/2 , outer = +Q/2 Q C) inner = 0, outer = 0 D) inner = +Q/2, outer = ­Q/2 E) inner = +Q, outer = ­Q Since E=0 in conductor • Gauss’ Law: 11 r r Qenc dA ∫ Eg = ε0 Qenc = 0 P h ys ic s 2 1 2 Le c tu re 4 , S lid e 9 Infinite C y lind e rs BB A long thin wire has a uniform positive charge density of 2.5 C/m. Concentric with the wire is a long thick conducting cylinder, with inner radius 3 cm, and outer radius 5 cm. The conducting cylinder has a net linear charge density of -4 C/m. What is the linear charge density of the induced charge on the inner surface of the conducting cylinder? A) -6.5 C/m B) -4 C/m C) -2.5 C/m D) -1.5 C/m E) 0 What is the linear charge density of the induced charge on the outer surface of the conducting cylinder? A) -4 C/m 15 B) -2.5 C/m C) -1.5 C/m D) 0 C/m E) +2.5 C/m P h y s ic s 2 1 2 Le c tu re 4 , S lid e 1 0 G a us s ’ La w r r Qenc dA ∫ Eg = ε0 ALWAY S T R UE! In c a s e s with s ym m e try c a n p u...
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