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The electric potential V is given as a function of distance ( metre ) by V= (5 x²+10 x-4 ) volt. Question: Value of electric field at x=1 ~m is

Options

  1. A-23 ~V / m
  2. B11 ~V / m
  3. C6 ~V / m
  4. D-20 ~V / m

Correct answer

D. -20 ~V / m

Step-by-step solution

V =5 x²+10 x-4 E = - dV dx =-(10 x+10) At x=1 m, E =-20 ~V / m

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