Two point like charges Q1 and Q2 of whose strength are equal in absolute value are placed at a certain distance from each other. Assuming the field strength to be positive in the positive direction of x-axis the signs of the charges Q1 and Q2 for the graphs (field strength versus distance) shown in Figures 1,2,3 and 4 are

Question

Two point like charges Q1 and Q2 of whose strength are equal in absolute value are placed at a certain distance from each other. Assuming the field strength to be positive in the positive direction of x-axis the signs of the charges Q1 and Q2 for the graphs (field strength versus distance) shown in Figures 1,2,3 and 4 are (A) Q1 positive, Q2 negative; both positive; Q1 negative, Q2 positive; both negative (B) Q1 negative Q2 positive; Q1 positive, Q2 negative; both positive; both negative (C) Q1 positive, Q2 negative; both negative; Q1 negative, Q2 positive; both positive (D) both positive; Q1 positive, Q2 negative ; Q1 negative, Q2 positive; both negative

Tardigrade Admin · Accepted Answer

For a point charge, E propto (1/X2). For positive charges, electric field will decrease in positive direction as distance increases, (case 1), for negative charge, as distance increases field will increase (case 4). As we move from positive charge to negative charge, field will keep on decreasing (case 2), As we move from negative to positive charge, field will keep on increasing (case 3)

$Q_{1}$ positive, $Q_{2}$ negative; both positive; $Q_{1}$ negative, $Q_{2}$ positive; both negative

$Q_{1}$ negative $Q_{2}$ positive; $Q_{1}$ positive, $Q_{2}$ negative; both positive; both negative

$Q_{1}$ positive, $Q_{2}$ negative; both negative; $Q_{1}$ negative, $Q_{2}$ positive; both positive

both positive; $Q_{1}$ positive, $Q_{2}$ negative $; Q_{1}$ negative, $Q_{2}$ positive; both negative

Q1​ positive, Q2​ negative; both positive; Q1​ negative, Q2​ positive; both negative

Q1​ negative Q2​ positive; Q1​ positive, Q2​ negative; both positive; both negative

Q1​ positive, Q2​ negative; both negative; Q1​ negative, Q2​ positive; both positive

both positive; Q1​ positive, Q2​ negative ;Q1​ negative, Q2​ positive; both negative

$Q_{1}$ positive, $Q_{2}$ negative; both positive; $Q_{1}$ negative, $Q_{2}$ positive; both negative

$Q_{1}$ negative $Q_{2}$ positive; $Q_{1}$ positive, $Q_{2}$ negative; both positive; both negative

$Q_{1}$ positive, $Q_{2}$ negative; both negative; $Q_{1}$ negative, $Q_{2}$ positive; both positive

both positive; $Q_{1}$ positive, $Q_{2}$ negative $; Q_{1}$ negative, $Q_{2}$ positive; both negative