Electric Potential and Electric Potential Energy

As a proton moves in the direction the electric field lines...

• it is moving from low potential to high potential and gaining electric potential energy.
• it is moving from low potential to high potential and losing electric potential energy.
• it is moving from high potential to low potential and gaining electric potential energy.
• it is moving from high potential to low potential and losing electric potential energy.

The magnitude of electric potential is ______ at an infinite distance.

• 0

• negative infinity

• positive infinity

• 200

What is voltage?

• The amount of electric potential energy per one coulomb of charge
• The amount of 1 coulomb of charge per unit of potential energy
• The number of volts per coulomb
• The amount of electric potential energy per volt

Q_A and Q_B are two charges creating an electric field. Based on the electric field lines, we can conclude

• Q_A and Q_B are both positive
• Q_A and Q_B are both negative
• Q_A is positive and Q_B is negative
• Q_A is negative and Q_B is positive

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

A region of space contains a uniform electric field, directed toward the right, as shown in the figure. Which statement about this situation is correct?

• The potential at point A is the highest, the potential at point B is the second highest, and the potential at point C is the lowest.
• The potential at points A and B are equal, and the potential at point C is lower than the potential at point A.
• The potential at all three locations is the same.
• The potentials at points A and B are equal, and the potential at point C is higher than the potential at point A.

Tags

NGSS.HS-PS2-5

Two point charges are separated by a distance of 10 cm. Charge on point A =+9 μC and charge on point B = -4 μC.

[k = 9 x 10⁹ Nm²C⁻², 1 μC = 10⁻⁶ C]

What is the electric potential energy between these two charges?

• 3.24 J

• 5.54 J

• 7.23 J

• 6.45 J

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-1

Electric field lines between two oppositely charged parallel metal plates will be .. 

• straight lines, randomly spaced
•  straight lines, evenly spaced
• curved lines grouped together in small bunches. randomly spaced.
•  d. curved lines, evenly spaced. e. curved lines,

The energy that is stored in a capacitor (parallel conducting plates) is in the form of 

• the current between its plates.  
• the space between its plates. 
• the electric field between its plates.
• the battery between its plates.

Tags

NGSS.HS-PS3-2

Which statements must be true about the surface of a charged conductor in which no charge is moving?

• The electric field is zero at the surface.
• The electric potential of the surface is zero.
• The electric potential is constant over the surface.
• The electric field is constant at the surface.

How much work must we do on an electron to move it from point A, which is at a potential of +50V, to point B, which is at a potential of -50 V, along the semicircular path shown in the figure? Assume the system is isolated from outside forces. (e = 1.60 × 10^-19 C)

• 1.60 × 10^-17 J
• -1.6 J
• 1.6 J
• -1.60 × 10^-17 J

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-1