question_answer

Two point like charges Q1 and Q2 of whose strengths 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 \[{{Q}_{1}}\] and \[{{Q}_{2}}\] for the graphs (field strength versus distance) shown in Fig. 1, 2, 3 and 4 are :

A)  \[{{Q}_{1}}\] positive, \[{{Q}_{2}}\] negative; both positive; \[{{Q}_{1}}\] negative, \[{{Q}_{2}}\] positive; both negative

B)  \[{{Q}_{1}}\] negative \[{{Q}_{2}}\] positive; \[{{Q}_{1}}\] positive, \[{{Q}_{2}}\] negative; both positive; both negative

C)  \[{{Q}_{1}}\] positive, \[{{Q}_{2}}\] negative; both negative; \[{{Q}_{1}}\] negative, \[{{Q}_{2}}\] positive; both positive

D)  both positive; \[{{Q}_{1}}\] positive, \[{{Q}_{2}}\] negative; \[{{Q}_{1}}\] negative, \[{{Q}_{2}}\] positive; both negative