Notes Ask Your You have buit a device that measures the temperature outside and

Question

Notes Ask Your You have buit a device that measures the temperature outside and displays it on a dial as a measure of how tar away from room temperature outside is. The way the dial works is that a needie with a charged bal on the end is placed between two charged parallel plates. The strength of the uniform electnic fold between the plates is proportional to the outside temperature. Gven that the charged ball on the needle has a charge of-24pCand the need e can be represented as a senn weh teson 0.350 N, and is at an angle of 23-·ensdef the rollowing. free-body diagram What is the mass of the object? What is the magnitude of the electric field? N/C

Explanation / Answer

Just applying the condition of equilibirium in this problem, in both horizontal and vertical directions.

Tcos23=mg

And, Tsin23=qE

So,

0.35cos23=m9.81

m=0.03284kg or 32.84g

and,

0.35sin23=2.4*10-6E

E=56981.6229N/C

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