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The strength of an electric field depends on:

• a) Size of the charge only

• Distance from the charge only

• Both the charge and the distance

What do closely spaced electric field lines indicate?

• Weak electric field

• Strong electric field

• Absence of charge

• Uniform field

Electric potential energy is directly proportional to:

• Charge only

• Distance only

• Charge and field strength

Which statement is true about electric potential energy?

• It is a vector quantity.

• It is independent of the charge.

• It is related to the work done on the charge.

Electric potential energy increases when:

• The charge decreases

• The electric field becomes weaker

• The charge moves against the field

What unit is used to measure electric potential?

• Newton

• Coulomb

• Volt

• Joule

Electric potential difference is represented by:

• V

• kq/r

• ΔV

In the formula V=kq/r, k represents:

• Charge magnitude

• Distance

• Coulomb constant

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