Static Charge

The interaction between charged objects is a non-contact force that acts over some distance of separation. Every electrical interaction involves a force that highlights the importance of which three variables?

• charge on one object, charge on a second object, and distance between the two objects

• force, mass and acceleration

• velocity, distance, and time

• energy, mass, and the speed of light

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Being a force, the strength of the electrical interaction is a vector quantity that has both magnitude and direction.

• true

• false

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The direction of the electrical force is dependent upon which of the following?

• whether the charged objects are charged with like charge or opposite charge

• the distance between the charged objects

• the F_grav, 9.8 m/s²

• the tangent of the circle of motion

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

According to the illustration, the charge on Object A is ______________, and the charge on Object B is ______________.

• negative, positive

• positive, negative

• positive, positive

• negative, negative

Tags

NGSS.MS-PS2-3

Which of the following factors affect the magnitude (strength) of the electrical force between objects? CHOOSE ALL THAT APPLY!

• the amount of charge on the objects

• the distance between the objects

• the mass of the objects

• the volume of the objects

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The equation represents the mathematical relationship between charge and distance, where Coulomb's Constant k = 9.0 x 10⁹ N•m²/C². Solve the following problem using this equation: Two point charges, one with a charge of +0.75 Coulomb and the other with a charge of +1.5 Coulomb are separated by a distance of 1.50 meter. Determine the magnitude of the electrical force of repulsion between them.

• F_elect = 4.5 x 10⁹ N

• F_elect = 9.0 x 10⁹ N

• F_elect = 5.5 x 10¹⁰ N

• F_elect = 6.5 x 10⁸ N

Tags

NGSS.HS-PS2-4

Two balloons are charged with an identical quantity and type of charge: -6.25 nC. They are held apart at a separation distance of 61.7 cm. Determine the magnitude of the electrical force of repulsion between them. NOTE: one nC = 10^-9 Coulombs. k = 9.0 x 10⁹ N•m²/C².

• 9.23 x 10^-7 N

• 9.23 x 10⁺⁷ N

• 8.23 x 10^-7 N

• 9.23 x 10^-5 N

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Electric Charge is a basic property of elementary particles of which all matter is composed (electrons, protons). There are two types of charge: Positive charges are carried by ________, while negative are carried by __________.

• protons, electrons

• protons, neutrons

• neutrons, electrons

• electrons, protons

The unit of electric charge is the Coulomb (C). The symbol for charge is q. What is the charge on an electron?

• -1.6 x 10^-19 C

• +1.6 x 10^-19 C

• -1.6 x 10⁺¹⁹ C

• +1.6 x 10⁺¹⁹ C

Tags

NGSS.HS-PS3-5

Charge is conserved. The combined total charge is constant (individual charges are never created or destroyed).

• True

• False