For figure 1, what must be the other two charges? (Include sign.) q 1 = µC. q 3

Question

For figure 1, what must be the other two charges? (Include sign.)
q1 =  µC.
q3 =  µC.

For figure 2, what must be the other two charges? (Include sign.)
q5 =  C
q6 =  C

Fig 1:q2 = -10.4 µC.

Fig 2:q4 = +5 C. The electric field maps of two independent charge configurations are shown below. (Take each to be a self-consistent scale drawing at a particular moment in time.) E field lines 12 13 Fig 2:94 = +5 c. Fig 1:q210.4 HC. For figure 1, what must be the other two charges? (Include sign.) q1 = q3 = For figure 2, what must be the other two charges? (Include sign.) q5 =

Explanation / Answer

no. of lines is directly propotional to the electric field strength.

lines through q2 = 16

lines through q1 = 8

lines through q3 = 8

so q1 = q3 = q2/2 = 10.4/2 = 5.2 uC

lines are going away from q1 and q3. so these are positively charged.

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line through q4 = 14

through q5 = 10

through q6 = 14

q5 = - (10 x 5 / 14) = - 3.57 C

q6 = 5 C

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