# 9.3 Electric Field And Potential

10 Questions | Total Attempts: 258  Settings  Electrical field is the space between particles that are charged positively charged and negatively charged. Having covered the topic on electricity fields and potential the quiz below is designed to ensure that you are ready for upcoming quiz. Give it a shot and all the best in the quiz. Good luck!

• 1.
Explain why electric potential can be sometimes be positive and sometimes negative whereas gravitational potential is ALWAYS negative.
• 2.
Are there any parts of this topic which are difficult and you would like to go over in class?  Ask a specific question.
• 3.
Define Electric Potential Energy at point P.
• A.

Work done in moving 1 Coulomb from the floor to a point P

• B.

Work done in moving a small test charge from the floor to a point P

• C.

Work done in moving 1 Coulomb from infinity to a point P

• D.

Work done in moving a small test charge from infinity to a point P

• E.

Work done in moving a 1 coulomb from the the surface of the charged sphere to a point P

• F.

Work done in moving a test charge from the surface of the charged sphere to a point P

• 4.
Define Electric Potential at point P.
• A.

Work done per unit charge in moving small test charge from the floor to a point P

• B.

Work done in moving a test charge from the floor to a point P

• C.

Work done in moving small test charge from infinity to a point P

• D.

Work done per unit charge in moving small test charge from infinity to a point P

• E.

Work done in moving a small test charge from the the surface of the charged sphere to a point P

• F.

Work done per unit mass in moving a test charge from the surface of the charged sphere to a point P

• 5.
What is the electric  field strength?
• A.

Force acting on a point charge

• B.

Force acting per unit charge on a point charge

• C.

Electric Potential Energy acting on a point charge.

• D.

Electric Potential Energy per unit charge acting on a point charge.

• 6.
How is the electric field strength related to the electric potential?
• A.

Electric field strength = electric potential

• B.

Electric field strength = electric potential energy

• C.

Electric field strength = electric potential gradient

• 7.
How can you calculate the electric potential at the surface of the charge sphere?
• A.

Electric Potential = electric field strength

• B.

Electric Potential = (electric field strength)/(Radius of sphere)

• C.

Electric Potential = (electricfield strength)x (radius of sphere)

• 8.
What is the relationship between equipotential lines and lines of force.
• A.

They are parallel to each other

• B.

They are equidistant

• C.

The are perpendicular to each other

• 9.
Describe the lines of equipotential near to a charged sphere.
• A.

Lines move radially away from the centre of the sphere

• B.

Lines are concentric and spaced equidistant from each other

• C.

Lines are concentric and spaced further apart from each other as they move away from the centre of the sphere.

• 10.
An electric field is set up between two parallel  plates which are 20cm apart.  The potential difference between the plates is 100V.  Calculate the stength of the electric field between the plates.
• A.

2000 N/C

• B.

500 N/C

• C.

200 N/C

• D.

50 N/C

• E.

20 N/C

• F.

5 N/C

• G.

2 N/C

• H.

0.5 N/C

• I.

0.2 N/C

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