(R) Unit 9: HW#1 Electric Potential & Electric Potential Energy

Two point charges are separated by a distance of 10 cm. Charge on point A =+9 μC and charge on point B = -4 μC.

[k = 9 x 10⁹ Nm²C⁻², 1 μC = 10⁻⁶ C]

What is the electric potential energy between these two charges?

• 3.24 J

• 5.54 J

• 7.23 J

• 6.45 J

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Two point charges are separated by a distance of 0.008 m. Charge on point A =-8 C and charge on point B = -7 C.

[k = 9 x 10⁹ Nm²C⁻²]

What is the electric potential energy between these two charges?

• 7.9 x 10¹³ J

• 5.7 x 10¹¹ J

• 6.3 x 10¹³ J

• 6.3 x 10¹¹ J

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NGSS.HS-PS2-4

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Calculate the Electric Potential of a +7.8 x 10⁹ C charge with Electric Potential Energy of 750 J

• 9.6 x 10^-3 V

• 6.5 x 10^-7 V

• 8.7 x 10⁹ V

• 9.6 x 10^-8 V

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What is the Electric Potential Energy of a 6.7 x 10⁹ C charge with an Electric Potential of 240 V?

• 1.61 x 10¹² J

• 2.42 x 10¹² J

• 1.34 x 10¹¹ J

• 2.7 x 10¹¹ J

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NGSS.HS-PS3-2

This model of the balloon shows ______ positive charges than negative charges. So this balloon is _____ charged.

• fewer/positively

• more/positively

• fewer/negatively

• more/negatively

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As a proton moves in the direction the electric field lines...

• it is moving from low potential to high potential and gaining electric potential energy.
• it is moving from low potential to high potential and losing electric potential energy.
• it is moving from high potential to low potential and gaining electric potential energy.
• it is moving from high potential to low potential and losing electric potential energy.

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Electric potential ____________ as distance increases.

• Increases

• Decreases

• Remains Constant

• Is 0

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The magnitude of electric potential is ______ at an infinite distance.

• 0

• negative infinity

• positive infinity

• 200

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The SI unit for electric potential is the ___________.

• Volen

• Vespa

• Volt

• Valspar

Q_A and Q_B are two charges creating an electric field. Based on the electric field lines, we can conclude

• Q_A and Q_B are both positive
• Q_A and Q_B are both negative
• Q_A is positive and Q_B is negative
• Q_A is negative and Q_B is positive

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NGSS.HS-PS2-4