Question: Pls help thanks 7. Two charges q, = -25 C and 93 = 4.0 C are placed 0.012 m apart. A third negative charge 92

Pls help thanks

7. Two charges q, = -25 C and 93 = 4.0 C are placed 0.012 m apart. A third negative charge 92 is placed a distance L from 9 , as shown. If the net electric force on 42 is 0 N, what is the value of L? (4 marks) 93 8. Sketch the electric field lines for the charges. Indicate the field direction with arrows. (2 marks) +29 +1q Suggest a reason why the aurora borealis moves and swirls, instead of remaining fixed. (2 marks) 9

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