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25. Electric Potential

Relationships Between Force, Field, Energy, Potential

25. Electric Potential

Relationships Between Force, Field, Energy, Potential

Multiple Choice
The water molecule is a permanent electric dipole with a dipole moment of $6.2 \times 10^{- 30} C m$ . A water molecule is aligned with an electric field of magnitude $7600 V / m$ . How much energy is required to rotate the molecule 180°?
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Multiple Choice
The x component of a uniform electric field is $E_{x} = 12 V / m$ . What is the potential difference between $x_{i} = 45 m$ and $x_{f} = 12 m$ ?
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Multiple Choice
The electric potential in a region of uniform electric field is $1200 V$ at $x = - 4.3 m$ and $2800 V$ at $x = 2.1 m$ . What is $E_{x}$ ?
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Multiple Choice
A -2C charge lies at rest. (a) What is the potential difference between point A, which is 1.5m from the charge, and point B, which is 4m from the charge? (b) What would the work on a 4C charge be to move it from A to B?
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Multiple Choice
What is the speed of a proton that has been accelerated through $2300 V$ ?
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Multiple Choice
Point A is at $- 25 V$ and point B is at $400 V$ . A proton moves past point A at $3.5 \times 10^{5} m / s$ , what is its speed when it reaches point B?
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