Physics Assessment

Two point charges, q1=15 μC and q2=−10 μC, are placed 4.00 cm apart from each other. Using Coulomb's law, determine the magnitude of the electric force exerted on charge q1, expressing your answer in scientific notation.

• 8.99 x 10^9 N

• 8.43 x 10^2 N

• 7.49 x10^6N

• 6.99x10^3N

Tags

NGSS.HS-PS2-4

μC = x10^-6

Two point charges, q1=15 μC and q2=−10 μC, are placed 4.00 cm apart from each other. Using Coulomb's law, determine the magnitude of the electric force exerted on charge q1, expressing your answer in scientific notation.

• 8.99 x 10^9 N

• 8.43 x 10^2 N

• 7.49 x10^6N

• 6.99x10^3N

Tags

NGSS.HS-PS2-4

Two spheres with charges of 8x10^-6 and -6x10^-6 attract each other with a force of 2x 10^-2 Newton. Determine the separation distance between the two objects

• 21.58 m

• 6.8 m

• 4.64 m

• 2.99 m

Tags

NGSS.HS-PS2-4

When electric field lines get closer together, what does that indicate about the electric field?

• The electric field is inversely proportional to the density of electric field lines.

• The electric field is directly proportional to the density of electric field lines.

• The electric field is not related to the density of electric field lines.

• The electric field is inversely proportional to the square root of density of electric field lines.

Tags

NGSS.HS-PS3-5

How do electric field lines behave between two opposite charges of equal strength?

• They curve towards each other

• They form circular loops

• They curve away from each other

• They scatter randomly

Tags

NGSS.HS-PS3-5

What is the primary mechanism of triboelectric effect?

• Charge transfer through a metal conductor

• Charge transfer by rubbing two different materials together and then pulling them apart

• Charge transfer via electromagnetic induction

• Charge redistribution in response to an external magnetic field

Two identical conducting spheres are initially charged with +10 units and -6 units respectively. They are brought into contact and then separated. What is the final charge on each sphere?

• +2 units on each sphere

• +3 units on each sphere

• +4 units on each sphere

• +5 units on each sphere

Tags

NGSS.HS-PS2-4

Which of the following materials is most effective at preventing the flow of electricity?

• Rubber

• Gold

• Iron

• Silver

In a parallel circuit with resistances of 8 Ω and 20 Ω, connected to a 12V power supply, what is the total power dissipated?

• 2.10 W

• 4.40 W

• 32.4 W

• 25.2 W

A circuit contains a 12 V battery and a 4 Ω resistor. What is the power dissipated by the resistor?

• 2 W

• 24 W

• 3 W

• 36 W