Two charged particles attract each other with a force of magnitude F. If the mag
ID: 1517738 • Letter: T
Question
Two charged particles attract each other with a force of magnitude F. If the magnitudes of the charge double and the distance separating the particles doubles, the force acting on each of the two particles has magnitude: F/4 F/2 F 2F 4F When we plot electric field lines: We can only determine a direction of the field in space. We can determine both the direction and the magnitude of the field everywhere in space. The principle of superposition of fields states that We can add electric field at location A to the field at location B to find the net field. We can independently add vectors of electric fields from separate charges at certain point in space. We can add magnitudes of the electric fields disregarding their directions. The figure shows the electric field lines in the vicinity of two point charges. Which one of the following statements concerning this situation is true? Charge q1 is negative and charge q2 is positive. The electric field is the largest midway between the charges. Charge q1 is smaller than charge q1. Charge q1 is larger than q2. Which of the pictures illustrating forces F and fields E from charges is correct?Explanation / Answer
1. force is directly proportional to charges and inversely to square of distance
magnitude of charges double and distance doubles so force remain the same i.e F
2.from electric field lines only direction can be known but not the magnitude
3.b
4.b
5.none of them are correct
in a force is corect but field is wrong
in b both are wrong
in c field is correct but force is wrong
in d force is correct but field wrong
6.b . electric field lines never cross each other
7. A negatively charged and B positively charged due to induction
8.false
whether conducting or insulating the electric field for a sheet is always surface charge density/permitivity of free space
9. the answer is c
because if flux is zero
then the total charge enclosed can be zero
10. left picture is correct area vector is taken as outward normal
11.r is distance from centre of sphere
12. gauss law is suitable for symmetrical charge distribution and valid for all vector fields obeying inverse square law
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