Electric Fields and Force

Based on the arrangement of the electric field lines in the diagram, what are the charges?

• both charges are the same

• the charges are opposite

• they are neutral; no charge

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Which statement best describes the electric fields in the image?

• The charges are neutral.

• Both charges are negative, so the field lines are alike.

• The field lines move toward a positive charge and away from a negative charge.

• The field lines move away from a positive charge and toward a negative charge.

Which statement describes what is happening in the image at the space indicated by the green arrow?

• The field lines are repelled by like charges.

• The field lines are repelled by opposite charges.

• The field lines are attracted by the like charges.

• The field lines are attracted by the opposite charges.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

When a balloon is rubbed on clothes it acquires a charge by ___________

• Induction
• reduction
• friction 
• concuction

An electrostatic force of 20. newtons is exerted on a charge of 8.0 x 10^-2 coulomb at point P in an electric field. What is the magnitude of the electric field intensity at P?

• 1.6 N/C

• 20. N/C

• 2.5 x 10² N/C

• 4.0 x 10^-3 N/C

Tags

NGSS.HS-PS2-4

What is electric field?

• force per unit positive charge

• region of space where a charge experiences a force

• region of space where a particle experiences a force.

• work done per unit charge in bring a positive charge from infinity to the point.

The diagram above shows two negatively charged balloons

suspended from nonconducting strings being held by a student. What occurs as the student brings the balloons closer to each other without allowing them to touch?

• The magnitude of the electrostatic force between the balloons increases, and they attract each other.

• The magnitude of the electrostatic force between the balloons decreases, and they repel each other.

• The magnitude of the electrostatic force between the balloons increases, and they repel each other.

• The magnitude of the electrostatic force between the balloons decreases, and they attract each other.

Tags

NGSS.HS-PS2-4

Two oppositely charged particles are held in place near each other. When the particles are released, what will most likely happen?

• the will accelerate towards each other
• they will accelerate away from each other
• they will move towards each other at a constant speed
• they will move away from each other at a constant speed

Tags

NGSS.HS-PS2-4

Choose TWO correct statements how lightning happened.

• The upper part cloud is negatively charged

• The ground is negatively charged

• The friction of air and cloud produce electric charges

• Force of repulsion occur between the ground and cloud

Tags

NGSS.MS-PS2-5

NGSS.MS-PS3-2

A woman's hair stands out when she is in contact with a charged Van de Graaff generator. The reason her hair stands out is because  

• hair strands are at a high voltage.  
• she is in a strong electric field.
• like charges repel. 
• hair is a good conductor.

Tags

NGSS.HS-PS3-5