a. two equal charges Q are separated by some distance. charge number 3 in sitting exactly between the two so that the net force on each is 0, this means that the third charge must be which:
-Q, -Q/2, -Q/4, -Q/8
b: two resistors are connected in parallel with battery, resistor 1 is greater than resistor 2, so this must mean which:
potential diff. across 1 is greater than across 2
the current is same in each resistor
the potential diff of 2 is greater than 1
potential diff is same for both.
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