Electric Field

In the diagram below, P is a point near a negatively charged sphere. Which direction best represents the direction of the electric field at point P?

• Right
• Left
• Up 
• Down

Tags

NGSS.HS-PS2-4

A point charge Q is far from all other charges. At a distance of 2 m from Q, the electric field is 20 N/C. What is the force a charge of 5 Coulombs feels?

• 4 N
• 100 N
• 40 N
• 10 N

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Which of the following statements is false about electric field lines

• electric field lines cannot cross
• electric field lines point away from positive charge
• electric field lines are always straight lines
• electric field lines show how a proton would move in an electric field

At which point is the electric field the strongest

• A
• B
• C
• D

Tags

NGSS.HS-PS2-4

An electrostatic force of 2 X 10^-2 Newtons is exerted on a charge of 4 micro coulomb at point P in an electric field. The magnitude of the electric field intensity at P is

• 5 X 10² N/C

• 5 N/C

• 50 N/C

• 5000 N/C

Tags

NGSS.HS-PS2-4

It is observed that Balloon A is charged negatively. Balloon B exerts a repulsive effect upon balloon A. Would the electric field vector created by balloon B be directed towards B or away from B and why?

• towards because electric field lines point away from negative charges
• towards because electric field lines point away from positive charges
• away because electric field lines point away from negative charges
• away because electric field lines point toward positive charges

Tags

NGSS.HS-PS2-4

What is the magnitude of the electric field intensity at a point where a proton experiences an electrostatic force of magnitude 2.30 x 10^-25 newton?

• 1.44 x 10^-6 N/C
• 3.68 x 10⁶ N/C
• 1.44 x 10⁴⁴ N/C
• 3.68 x 10^-44 N/C

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

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-PS3-2

NGSS.HS-PS3-5

A proton is accelerated from rest through a potential difference V₀ and gains a speed v₀. If it were accelerated instead through a potential difference of 2V₀, what speed would it gain?

• $8v_0$

• $4v_0$

• $v_0\sqrt{2}$

• $2v_0$

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-5

The electric potential at a distance of 4 m from a certain point charge is 200 V relative to infinity. What is the potential (relative to infinity) at a distance of 2 m from the same charge?

• 600 V
• 50 V
• 200 V
• 400 V

Tags

NGSS.HS-PS2-4