Unit 22 - Electric Fields

Question 1

What is an electric field?

Answer 1

The area around an object in which a charge would experience a force

Question 2

What is the definition of electric field strength?

Answer 2

The force per unit of positive charge

Question 3

What is Coulomb’s law?

Answer 3

The force between 2 electric charges Q and Q is proportion to Qq and inversely proportional to the square of their separation, r

Question 4

What effects the capacitance on a parallel capacitor depend on?

Answer 4

Overlap area of the plates and separation of the plates

Question 5

What are equipotential lines?

Answer 5

Equipotential lines link points of equal electric potential in an electric field.

Question 6

What is electric potential?

Answer 6

The work done per unit charge bringing down a positive charge from infinity to a point

Question 7

What is the area under a force against distance graph equal to ?

Answer 7

Work done

Question 8

What is the area under a force against distance graph equal to ?

Answer 8

Work done

Question 9

What I are similarities and differences of Gravitational and electric fields?

Answer 9

• Both are inversely proportional to separation squared
• Gravitational field always attracts, magnetic can attract and repel