2) See the configuration of three spheres in the figure below. What is the direc

Question

2) See the configuration of three spheres in the figure below. What is the direction of the net electric field on sphere B due to spheres A and C? PS.: r is the distance between A and B and E and C q (A) q(C) (B)-qx b) c) d) y A a) net Enet net 3) About the electric field lines is correct to say that: a) the electric field is found tangent through a given point at the field lines. b) the distance between subsequent lines is proportional to the magnitude of the electric field c) the field lines are completely useless. d) both a) and b). e) none of the above

Explanation / Answer

Given

2)

the spheres A,B,C

the charges at sphere A and C are positive so that

we know that the field lines for positive charge is radially outward so that the field lines from sphere C at sphere B is along -ve x direction  

and due ot sphere A , at B is along -ve y direction  

the resusltant (E_net) of the field lines is 45 degrees in the third quadrant

from the given options the graph c is suitable  

so the answer is c)

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3)

from the given options about the electric field and field lines is  

the electric field is found tangent through a given point at the field lines

and the distance between subsequent lines is proportional to the magnitude of the electric field

so the answer is option c

both a) and b)

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