What is the potential difference between x_i = 15cm and x_f = 40cm in the uniform electric field E_x = 2000V/m?

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What is the potential difference between x_i = 15cm and x_f = 40cm in the uniform electric field E_x = 2000V/m?V_f-V_i=________V

Answer to 7033561Potential Difference V=Electric field *Distance(x)Vi =2000*0.15=300 VVf=2000*0.4=800Vf-Vi=500v