Electric Potential - AP Physics 2
Card 1 of 30
State the unit of electric potential.
State the unit of electric potential.
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Volt (V). Standard unit for measuring electric potential.
Volt (V). Standard unit for measuring electric potential.
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What is the potential energy of a charge in a uniform electric field?
What is the potential energy of a charge in a uniform electric field?
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$U = qEd$. Energy stored in uniform field configuration.
$U = qEd$. Energy stored in uniform field configuration.
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State the formula for potential energy in terms of electric field and distance.
State the formula for potential energy in terms of electric field and distance.
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$U = qEd$. Energy from charge, field, and displacement.
$U = qEd$. Energy from charge, field, and displacement.
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Identify the potential energy formula for a system of charges.
Identify the potential energy formula for a system of charges.
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$U = \frac{kq_1q_2}{r}$. Standard formula for charge interaction energy.
$U = \frac{kq_1q_2}{r}$. Standard formula for charge interaction energy.
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State the formula for the electric potential due to a point charge.
State the formula for the electric potential due to a point charge.
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$V = \frac{kq}{r}$. Coulomb's law for potential from point charge.
$V = \frac{kq}{r}$. Coulomb's law for potential from point charge.
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How is potential difference related to work done on a charge?
How is potential difference related to work done on a charge?
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$W = q \triangle V$. Fundamental relationship between work and voltage.
$W = q \triangle V$. Fundamental relationship between work and voltage.
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Calculate the potential energy of a $2C$ charge in a $10V$ field.
Calculate the potential energy of a $2C$ charge in a $10V$ field.
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$20 \text{ J}$. Using $U = qV = 2 \times 10 = 20$.
$20 \text{ J}$. Using $U = qV = 2 \times 10 = 20$.
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What is the formula for the potential difference in a uniform field?
What is the formula for the potential difference in a uniform field?
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$\triangle V = Ed$. Potential difference in uniform electric field.
$\triangle V = Ed$. Potential difference in uniform electric field.
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Calculate the potential difference for a $4V$ and $12V$ junction.
Calculate the potential difference for a $4V$ and $12V$ junction.
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$8 \text{ V}$. Difference equals $12 - 4 = 8$ volts.
$8 \text{ V}$. Difference equals $12 - 4 = 8$ volts.
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State the unit of electric potential energy.
State the unit of electric potential energy.
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Joule (J). Standard unit for measuring energy quantities.
Joule (J). Standard unit for measuring energy quantities.
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How is the work done on a charge related to potential difference?
How is the work done on a charge related to potential difference?
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$W = q \triangle V$. Work done equals charge times voltage change.
$W = q \triangle V$. Work done equals charge times voltage change.
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Define the term 'equipotential surface'.
Define the term 'equipotential surface'.
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A surface with constant electric potential. Surface where potential remains constant everywhere.
A surface with constant electric potential. Surface where potential remains constant everywhere.
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State the unit of electric potential.
State the unit of electric potential.
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Volt (V). Standard unit for measuring electric potential.
Volt (V). Standard unit for measuring electric potential.
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How is potential difference related to work done on a charge?
How is potential difference related to work done on a charge?
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$W = q \triangle V$. Fundamental relationship between work and voltage.
$W = q \triangle V$. Fundamental relationship between work and voltage.
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How is work done related to electric potential difference?
How is work done related to electric potential difference?
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$W = q \triangle V$. Standard work-voltage relationship formula.
$W = q \triangle V$. Standard work-voltage relationship formula.
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What is the formula for electric potential difference?
What is the formula for electric potential difference?
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$\triangle V = V_f - V_i$. Change in potential equals final minus initial.
$\triangle V = V_f - V_i$. Change in potential equals final minus initial.
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Calculate the work done in moving a charge of $2C$ through a potential difference of $5V$.
Calculate the work done in moving a charge of $2C$ through a potential difference of $5V$.
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$10 \text{ J}$. Work equals charge times potential difference: $W = qV = 2 \times 5 = 10$.
$10 \text{ J}$. Work equals charge times potential difference: $W = qV = 2 \times 5 = 10$.
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State the formula for potential energy in terms of electric field and distance.
State the formula for potential energy in terms of electric field and distance.
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$U = qEd$. Energy from charge, field, and displacement.
$U = qEd$. Energy from charge, field, and displacement.
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What is the potential at a point midway between two equal charges?
What is the potential at a point midway between two equal charges?
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Zero. Symmetric positioning cancels equal contributions.
Zero. Symmetric positioning cancels equal contributions.
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What is the electric potential energy of a $2C$ charge at $3V$?
What is the electric potential energy of a $2C$ charge at $3V$?
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$6 \text{ J}$. Using $U = qV = 2 \times 3 = 6$.
$6 \text{ J}$. Using $U = qV = 2 \times 3 = 6$.
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What is the formula for electric potential energy?
What is the formula for electric potential energy?
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$U = qV$. Energy equals charge times potential.
$U = qV$. Energy equals charge times potential.
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State the formula for the electric potential due to a point charge.
State the formula for the electric potential due to a point charge.
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$V = \frac{kq}{r}$. Coulomb's law for potential from point charge.
$V = \frac{kq}{r}$. Coulomb's law for potential from point charge.
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Calculate the potential difference for a $4V$ and $12V$ junction.
Calculate the potential difference for a $4V$ and $12V$ junction.
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$8 \text{ V}$. Difference equals $12 - 4 = 8$ volts.
$8 \text{ V}$. Difference equals $12 - 4 = 8$ volts.
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What is the potential energy of a charge in a uniform electric field?
What is the potential energy of a charge in a uniform electric field?
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$U = qEd$. Energy stored in uniform field configuration.
$U = qEd$. Energy stored in uniform field configuration.
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State the formula for the potential energy of a system of two charges.
State the formula for the potential energy of a system of two charges.
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$U = \frac{kq_1q_2}{r}$. Interaction energy between two point charges.
$U = \frac{kq_1q_2}{r}$. Interaction energy between two point charges.
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Calculate the potential energy of $5C$ in a $4V$ potential.
Calculate the potential energy of $5C$ in a $4V$ potential.
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$20 \text{ J}$. Using $U = qV = 5 \times 4 = 20$.
$20 \text{ J}$. Using $U = qV = 5 \times 4 = 20$.
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How is the work done on a charge related to potential difference?
How is the work done on a charge related to potential difference?
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$W = q \triangle V$. Work done equals charge times voltage change.
$W = q \triangle V$. Work done equals charge times voltage change.
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Identify the potential difference needed to store $20J$ in $2C$ of charge.
Identify the potential difference needed to store $20J$ in $2C$ of charge.
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$10 \text{ V}$. From $U = qV$, solve for $V = \frac{U}{q} = \frac{20}{2} = 10$.
$10 \text{ V}$. From $U = qV$, solve for $V = \frac{U}{q} = \frac{20}{2} = 10$.
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What is the electric potential at a point equidistant from two equal charges?
What is the electric potential at a point equidistant from two equal charges?
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Zero. Equal charges create symmetric cancellation.
Zero. Equal charges create symmetric cancellation.
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Identify the potential energy formula for a system of charges.
Identify the potential energy formula for a system of charges.
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$U = \frac{kq_1q_2}{r}$. Standard formula for charge interaction energy.
$U = \frac{kq_1q_2}{r}$. Standard formula for charge interaction energy.
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