Three electric charqes are arranaed on a straight line as shown in the figur. Se
ID: 250158 • Letter: T
Question
Three electric charqes are arranaed on a straight line as shown in the figur. Select True or False for the following statements. If Q_1 is positive, Q_2 is negative and Q_3 is positive, then Q_2 MUST feel a net force to the right. If Qi is negative, Q_2 is negative and Q_3 is positive, then Q_2 MUST feel a net force to the right. If Qi is positive, Q_2 is negative and Q_3 is positive, then Q_2 MIGHT feel a net force to the right. If Qi is positive, Q_2 is negative and Q_3 is negative, then Q_2 MUST feel a net force to the right. Tries 0/5 In the above figure, R = 1.48 m, Q_1 = 1.92 times l0^_6 C, Q_2 = - and Q_3=-Q_1. Calculate the total force on Q_2. Give your answer with a positive number for a force directed to the right. Tries 0/5Explanation / Answer
a) If Q1 is positive, Q2 is negative and Q3 is positive:
Q2 feels an attraction from Q1
Q2 feels an attraction from Q3
If they have the same magnitude of charge, the net force is zero.
False
b) If Q1 is negative, Q2 is negative and Q3 is positive then:
Q2 feels a repulsion from Q1
Q2 feels an attraction from Q3
then Q2 feels a force to the right.
True
c) If Q1 is positive, Q2 is negative and Q3 is positive, then
Q2 feels an attraction from Q1
Q2 feels an attraction from Q3
If they have the same magnitude of charge, the net force is zero.
False
d) If Q1 is positive, Q2 is negative and Q3 is negative, then
Q2 feels an atrraction from Q1
Q2 feels a repulsion from Q3.
Then Q2 feels a force to the left.
True
In this case Q1 is positive, Q2 is negative and Q3 is negative:
F= 2kQ²/R² to the left:
using given data:
F=-0.03029 N to the left