Electric Energy and Potential

A tiny sphere carrying a charge of 6.5 µC sits in an electric field, at a point where the electric potential is 240 V. What is the sphere’s potential energy?

• 2.7 x 10^-8 J 
• 6.5 x 10^-6 J 
• 1.6 x 10^-3 J
• 240 J 

If 500 J of work are required to carry a 40-C charge from one point to another, the potential difference between these two points is: 

• 12.5 V 
• 20,000 V 
• 0.08 V 
• depends on the path 

The potential difference between two points is 100 V. If a particle with a charge of 2 C is transported from one of these points to the other, the magnitude of the work done is: 

• 200 J
• 100 J
• 50 J
• 2 J

The electric field lines between two oppositely charge plates are mostly...

• parallel

• curved

• 0

• repelling

• drawn from low potential to high potential

Electric potential difference is measured in:

• V

• C

• F

• N/C

• V or J/C

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

• 0

• negative infinity

• positive infinity

• 200

Electric potential ____________ as distance increases.

• Increases

• Decreases

• Remains Constant

• Is 0

At which point is the electric field the weakest?

• A because it is the furthest away
• A because the field lines are further apart
• C because the field lines are further apart
• C  because it is the furthest away

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

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