1at\' im\'s enters a region with a unidorm electric field as shown in the fligwe

Question

1at' im's enters a region with a unidorm electric field as shown in the fligwe.-23 1'mwh mageitude of the electric field so that the electron esits this region with velocity at an le of 35, below positive Nis? "gone gravity and air resistance A 428.7 NC B. 283NG C 11.1NC D. 051 NC E 3.54NC hould he the so. 10. A nonconducting sphere of radias a-02m bas a net charge O-30 C distrined unisornsly over is volume It is surrounded by a thin conducting shell of radius 04 m and aero net charge The electric field at dir lancer-1.0 m ceele' or Necaduting E-854 NCF E--270NCF E. E-70 NCP I1. A charged invelating rod in shaped as a semicinale. The upper halr (ahove the danhed line) has a sotal changs-2 uniformly disaributed ovr i, whereas the lower halif (below the dashed linc) has a otal charge O uniformly disributed over it. Which of the following statments best describes electric field E at the point O? A. E points horizontally to the right B. E points horinontally to the left C E points verticalty upward D. E points vernically dowsward E. E is zeo 2 In the figure.-36 C and d 3, What charge would you choose for g to ensure that ,is in oquilibriam? -320C B 64pC C -112p D. -800 pC E 0.7pC -a

Explanation / Answer

only the values of last question is clearly visible so i will solve that for you.

For q1 to be in equilibrium net force on it should be zero.

Force on q1 due to q2 is in negative direction whereas due to q3 is in positive direction

Thus

kq1*q2/d1^2 =kq1*q3/(d1+d2)^2

q2*(d1+d2)^2=q3*d1^2

q3=q2*(d1+d2)^2/d1^2

q3=q2(3d2+d2)^2/(3d2)^2

q3=16*q2/9

Thus

q3=16*36*10^{-6}/9=64*10^{-6}C

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