The Energy Associated with Electric Charges

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.

Tags

NGSS.HS-PS3-5

Two protons are released from rest, with only the electrostatic force acting. Which of the following statements  is NOT true about them as they move apart? 

• Their electric potential energy keeps decreasing.
• Their electric potential energy keeps increasing.
• Their acceleration keeps decreasing.
• Their kinetic energy keeps increasing.

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

NGSS.HS-PS3-5

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.

what is the meaning of "Electric Dipole" ?

• Two equal point charges Q, of same signs , separated by a distance "d"

• Two equal point charges Q, of opposite, separated by a distance "d"

• Two unequal point charges Q, of opposite, separated by a distance "d"

• Two unequal point charges Q, of opposite, stick together.

If it takes 88.3 J of work to move 0.721 C of charge from a positive plate to a negative plate, what is the potential difference(voltage) between the plates?

• V = 0 v

• V = 1.22 v

• V = 122 v

• V = 150V

Two parallel oppositely charged plates are 5.1 cm apart.The potential difference, in volts, between the plates is 44.6 v.Find the electric field strength between them.

• E = 8.7 x 10 ² N.C

• E = 8.7 x 10 ² N / C

• E = 8.7 x 10 ² C

• E = 8.7 x 10 - ² N / C

Tags

NGSS.HS-PS2-4

How much work does it take to transfer 0.15 C of charge through a potential difference of 9.0 v ?

• W = 60 J

• W=1.4 J

• W = 0 N

• W = - 1.4 N

Tags

NGSS.HS-PS3-1

An electron is accelerated from rest through a potential difference 12 V. What is the change in electric potential energy of the electron?

• -19.2 x 10^-19 Joule

• 19.2 x 10^-19 Joule

• -1.92 x 10^-19 Joule

• 1.92 x 10^-19 Joule

Tags

NGSS.HS-PS3-1

Two parallel plates are charged. The separation between the plates is 2 cm and the magnitude of the electric field between the plates is 500 Volt/meter. What is the change in potential energy of the proton when accelerated from the positively charged plate to the negatively charged plate.

• ΔPE = 16.0 x 10^-18 Joule

• ΔPE = -1.6 x 10^-18 Joule

• ΔPE = 1.6 Joule

• ΔPE = 1.6 x 10^-18 Joule

Tags

NGSS.HS-PS2-4