An electron is initially moving to the right when it enters a uniform electric f

Question

An electron is initially moving to the right when it enters a uniform electric field directed upwards. Which trajectory shown below will the electron follow? A) trajectory w B) trajectory Z C) trajectory Y D) trajectory X If two macroscopic objects are electrically attracted to each other, one object must be negatively charged and tin- other object must be positively charged. B) both objects must be negatively charged. C) both objects must be positively charged. D) None ol the above statements are absolutely true. Two identically charged balls are a certain distance apart. The vectors in the diagram below show the magnitude and direction ol the electrostatic force on each ball. Suppose the charge on the left ball is now doubled (represented by two plus signs). Which diagram below best represents the lord's that now act on the two balls?

Explanation / Answer

8) it will follow the trajectory Z

9)only unlike charges attract each other

so , one must be negatively charged and other one must be positively charged

Option A is the correct answer

10 ) F = Kq1q2/r^2

when the charge on one of the objects is doubled

F becomes k2q1q2/r^2 = 2kq1q2/r^2

so the net force on each charges is doubled

so, option B is the corect answer

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