Q3 Find the electric field a distance y above the midpoint between two equal and opposite charges, q and-q, that are a distance d apart as shown in Fig. 1 below. Consider ONLY case where (y >> d). (i) E= 1 qd Απες 33 1 qd (ii) E= 4780 ° [y² + ( 2+(4) 21³/2 1 qd 4TEO y ²³/₂ (iv) None of the above (iii) Ē= x (i) E (ii) Ē – = -9 1 qd x 4περ y3 d/2 1 Απερ ¹²0 32 Fig. 1 d/2 qd [y² + (4) ²] 3/2 +q x X

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Q3 Find the electric field a distance y above the midpoint between two equal and opposite
charges, q and-q, that are a distance d apart as shown in Fig. 1 below. Consider ONLY
case where (y >> d).
(i) Ē=
(ii) E
1 qdx
Απε, y3
1
4πEO
qd
-
° [y²+(99²] *¹²
(iii) Ē=
1 qd
Απεο y/2
(iv) None of the above
-x
(1) E
(ii)
Ē
=
-9
=
1 qd
4περ y3
d/2
12
Fig. 1
d/2
+q
1
qd
Απερ
3/2
* *
[y² + (9²]
Transcribed Image Text:Q3 Find the electric field a distance y above the midpoint between two equal and opposite charges, q and-q, that are a distance d apart as shown in Fig. 1 below. Consider ONLY case where (y >> d). (i) Ē= (ii) E 1 qdx Απε, y3 1 4πEO qd - ° [y²+(99²] *¹² (iii) Ē= 1 qd Απεο y/2 (iv) None of the above -x (1) E (ii) Ē = -9 = 1 qd 4περ y3 d/2 12 Fig. 1 d/2 +q 1 qd Απερ 3/2 * * [y² + (9²]
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