Unit 9: Electrostatics and Electric Fields

Which two particles are attracted to each other?

• Two neutrons

• A proton and an electron

• Two protons

• An electron and a neutron

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NGSS.HS-PS3-5

What is the SI unit for charge?

• Joules

• Coulombs

• Newtons

• Meters

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What is the name of this device that is used to detect charges?

• beaker
• electroscope
• van de graff generator
• chargometer

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NGSS.HS-PS2-4

NGSS.HS-PS3-5

Approximately how much force would be generated by two charged objects held 2 m apart, if q₁ has a charge of 3.0 C and q₂ has a charge of 4.0 C?

• 0.5 N

• 150 N

• 270 N

• 300 N

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NGSS.HS-PS2-4

Electric Field strength depends on what

• charge

• distance

• charge and distance

• electric force

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Which of the following materials conducts electricity the best?

• plastic

• rubber

• metal

• glass

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Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.

• -1.5 x 10^-11 N

• 2.5 x 10^-11 N

• -2.5 x 10¹¹ N

• -7.5 x 10^-10 N

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NGSS.HS-PS2-4

A repulsive force exists between which two particles?

• Two neutrons

• An electron and a neutron

• An electron and a proton

• Two electrons

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NGSS.HS-PS2-4

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How close must two electrons be to generate a force of 1000 N. Charge of an electron = 1.6x10^-19 C

• 4.8E-16
• 2.35E-31
• 1.4E-10
• 1.2E-5

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NGSS.HS-PS2-4

A metal sphere having an excess of +5 elementary charges has a net electric charge of

• 8.0 x 10^-19 C
• 8.0 x 10¹⁹ C
• 1.6 x 10^-19 C
• 5.0 x 10^-19 C

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