Answer:
Electric force, 
Explanation:
It is given that,
Magnitude of electric field, 
Charge, 
The electric field is directed parallel to the positive y axis. We need to find the force on the charge particle. It is given by :
So, the electric force on the charge is 
. Hence, this is the required solution.
The answer for this question, If I am correct, should be answer "D".
Answer:
○ 0 
Explanation:
Even if the athelete runs four laps of a 400 m track, its displacement will be 0 because the displacement is the shortest distance from its to final position. And, here the final and initial position is same since he comes to its initial position after covering certain distance. So, displacement is 0.
The radius of the sphere is r=5.15 cm=0.0515 m, and its surface is given by
So the total charge on the surface of the sphere is, using the charge density
:
The electrostatic force between the sphere and the point charge is:
where
ke is the Coulomb's constant
Q is the charge on the sphere
is the point charge
r is their separation
Re-arranging the equation, we can find the separation between the sphere and the point charge:
Answer:
B
Explanation:
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