Question 11: The diagram below shows three point charges: which make a right angle. -q d H: o d O I Suppose that q = 18 n0 and d = 0.83 mm. What is the magnitude of the net eleetrie force on the charge in the upper right corner? Question 12: A +8.00 point charge is at the origin. A 6.0C point charge is at :L' = 1.5 n1, on the 9: axis. \"Where on the 1:: axis is the electric eld 0? Question 13: At a certain point \"P, the electric eld due to a nearby proton is: E = (3.9, 2.2,0) N/C How far away is the proton from point 73? Question 14: Let's approximate a neuron's axon as a long charged line, with charge-per-length -4.5x10-16 C/m. What is the mag- nitude of the electric field 8.0 um from the axon? (a) 0.17 N/C (b) 0.50 N/C (c) 1.0 N/C (d) 1.3 N/C (e) 2.0 N/CQuestion 15: The diagram below shows three point charges, which make a right angle. -q d H: . d O H: Suppose that q = 18 HC and d = 0.831n1n. Note that this is the same setup as Question 11. 'What is the total electric potential energy of this congu ration? (a ~25 mi] (b ~36 mi] 0.20 MJ ) ) (c) ~21] ) ) 42.40 MJ