46 C 2. Two identically charged balls are separated from each other by some dist

Question

46 C 2. Two identically charged balls are separated from each other by some distance between the two balls is haived, by what factor does the electric force chang A) 1/4 8) 1/2 c) 2 D) 4 E) 8 the 3. Two identically charged balls are separated from each other by some distance t.it the charg o one object is doubled, by what factor does the electric force change? A) 1/4 B) 1/2 c) 2 D) 4 E) 8 4. Two charges lie on the +x axis: 12 nC at x 0.24 m and 12 nC at x o.64 m. Where on the could a third charge be placed so that the net force on it is zero? A) There is no such place. B) x-0.47 m C) x-0.44 m D) x-0.34 m E) x-0.29 m Three identical charges are placed at the vertices of an equilateral triangle (san side). What is the direction of the net force on the charge at the top corner (S A) In the +y direction B) In the -y direction C) In the +x direction D) In the -x direction E) None of the above 5. q1 q3

Explanation / Answer

2. Fe = k q1 q2 / r^2

r' = r/2

then Fe' = 4 Fe

Ans(D)

3. q1' = 2 q1

then Fe' = 2 Fe

Ans(C)

4. zero field point will be in between charges.

both charges have same magnitude charge.

hence point will be middle point.

x = (0.24 + 0.64)/2 = 0.44 m

Ans(C)

5. (A) in +y direction

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