Physics Review Question Unit: electricity and magnetism Year: 1997 Question#: 24 Question: A distance of 1.0 x 103 m separates the charge at the bottom of a cloud and the ground. The electric field intensity between the bottom of the cloud and the ground is 2.0 x 104 newtons per coulomb. What is the potential difference between the bottom of the cloud and the ground? (1 ) 1.3 x 1023 V (2 ) 2.0 x 101 V (3 ) 2.0 x 107 V (4 ) 5.0 x 10-2 V What is this question really asking? Explanation by: Dana H [ Return to question menu ] Answer 1 1.3 x 1023 V INCORRECT Incorrect, the equation is E=V/d, so one has to multiply the distance and the electric field intensity. return to top Answer 2 2.0 x 101 V INCORRECT When you multiply the distance and the electric field intensity you do not get 2.0 x 101 V. return to top Answer 3 2.0 x 107 V Correct, E=V/d, when the distance and the electric field intensity are multiplied, 2.0 x 107 V is correct. return to top Answer 4 5.0 x 10-2 V INCORRECT Try the formula E=V/d. return to top What's this question really asking? Between the bottom of the cloud and the and the ground the potential difference is what? return to top |
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