Q7 Suppose a long wire solid metal cylindrical rod of radius a is surrounded by a thin cylindrical metal shell of radius b (see Fig. 1). The inner cylinder carries positive charge per unit length + and the outer shell carries a negative charge per unit length -. Calculate the electric field and the electric potential at the region a ≤r≤b. (i) (ii) (iii) (iv) O (1) O O E = - 2²³² & V = = In (²) 2mEr 2mE, E = 0 & V=0 E=V None of the above O Ē = λ 2πε r · & V = Fig. 2 (iii) E = V (iv) None of the above λ 1272, In (²) 2πε. (ii) E= 0 & V= 0 =
Q7 Suppose a long wire solid metal cylindrical rod of radius a is surrounded by a thin cylindrical metal shell of radius b (see Fig. 1). The inner cylinder carries positive charge per unit length + and the outer shell carries a negative charge per unit length -. Calculate the electric field and the electric potential at the region a ≤r≤b. (i) (ii) (iii) (iv) O (1) O O E = - 2²³² & V = = In (²) 2mEr 2mE, E = 0 & V=0 E=V None of the above O Ē = λ 2πε r · & V = Fig. 2 (iii) E = V (iv) None of the above λ 1272, In (²) 2πε. (ii) E= 0 & V= 0 =
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Transcribed Image Text:Q7 Suppose a long wire solid metal cylindrical rod of radius a is surrounded by a thin
cylindrical metal shell of radius b (see Fig. 1). The inner cylinder carries positive charge per
unit length + and the outer shell carries a negative charge per unit length -. Calculate the
electric field and the electric potential at the region a <r<b.
(i)
(iv)
O
E =
O (1)
○
2
-* & V = 2 * In (²)
2mEr
E = 0 & V = 0
E = V
None of the above
E
λ
2πε η
-F & V =
Fig. 2
(iii) E = V
(ii) E= 0 & V=0
(iv) None of the above
λ
2A/5. In (²)
2πε.
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