Course Contents » » HW 02 (Jan. 29) » Test charge A test charge of 1.30 HC is pl

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Course Contents » » HW 02 (Jan. 29) » Test charge A test charge of 1.30 HC is placed 8.70 cm away from a large flat uniformly charged nonconducting surface. The force on the charge is 230.ON The charge is now moved to 3.10 cm away from the surface. What is the force on the test charge now? Submit Anwer Tries 0/12 Threaded View Export My general preferences on what is marked as NEW Mark NEW posts.no.Jonger new NEW Anonymous 1 Rephy (Mon Jan 29 11:23:53 am 2018 (EST)) How do I find the charge of the plate? NEW Re: Jaideep Singh Reply (Mon Jan 29 03:11:49 pm 2018 (EST) An infinite uniformly charged plane is a very good approximation to a real free planes 1, the electric field is being calculated far from any edges (i.e. the surface assumed to be large) 2. we assume that the density of the surface charge on the real plane is uniform On a nonconducting surface, the charges are fixed in place and to a very good approximation do not move and/or rearrange t hemselves in response to an external fheld rked not New ganas My settings for this discussion 1. Display . A/posts 2. Not new-Once ma My geceral prefecences.on what is macked.as NEW Threaded. Vie Chronological. Viw Other Views Exporn

Explanation / Answer

We know that electrostatic force is inversly propotional to r2.

Also, the charge on the nonconducting surface is not being changed, so whatever will be the change in the force that will just be because of the distance change so,

We can say that

F*r2=constant

So,

230*8.72=F*3.12

=1811.519N

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