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A charged particle of radius 5*10^-7m is located in a horizontal electric field of intensity 6.28*10^5 V/m. The surrounding medium has the coefficient of viscosity= 1.6*10^5 Nsm^-2. The particle starts moving under the effect of electric field and finally attains a uniform horizontal speed of 0.02m/s. Find the number of electrons on it. Assume gravity free space. 
 
 

dee , 5 Years ago
Grade 11
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