Gravity Lab Quiz: This is the Retake

Two charged objects exert an electrical force of attraction of F on each other. The charge on one of the objects is quadrupled, and the charge on the other object stays the same. What is the new force of attraction between the objects?

• 1/2 F

• 2F

• 4F

• 8F

If the force doubles then which of these changes would have to occur first on two point charges?

• halving the distance between the charges

• doubling the magnitude of one charge

• halving the magnitude of one charge

• doubling the distance between the charges

The electrostatic force on two positive point charges is F when the charges are 1.0 meter apart. When these point charges are placed 0.5 meter apart, what is the new electrostatic force on them?

• 4F, and repelling

• 4F, and attracting

• No change to F, and attracting

• No change to F, and repelling

The magnitude of the electrostatic force between a positive and negative charge is F. The distance between the charges is doubled. What is the new magnitude of the electrostatic force on the charges?

• 1/4 F

• 1/2 F

• 2F

• 4F

What happens to the force between two charged objects if you triple the magnitude of one charge? 

• 1/3X
• 3X
• 1/9X
• 9X

Tags

NGSS.HS-PS2-4

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly
• decreases;inversely
• increases;inversely
• increases;directly

Tags

NGSS.HS-PS2-4

Two electrons exert a 20-N repulsion force on each other. They are separated by a distance of 1 meter. If the charges are moved apart to a 2 meter distance, what will be the new repulsion force between the charges?

• 10 N

• 5 N

• 2.5 N

• 40 N

What is the unit for Electric Force?

• Newton
• Couloumb
• Newtons/Couloumb
• Nano

Tags

NGSS.HS-PS2-4

To quadruple something means to . . .

• increase by 2

• increase by 4

• decrease by 2

• decrease by 4

"To exert" a force means to . . .

• to break

• to move

• to shrink

• to apply