3.2

Question 1

How can static electricity be produced?

Answer 1

By contact, friction or induction

Question 2

What is the current per mm^2 also known as?

Answer 2

The current density (J)

Question 3

What is the equation for the current density?

Answer 3

J = I (current) / A (cross-sectional area)

Question 4

What is the maximum temperature a cable can be operated at?

Answer 4

60°C

Question 5

An electrostatic field is present around every charged body in all directions. Where do these lines of force terminate?

Answer 5

They terminate where there is an opposite charge

Question 6

When a current flows through a metallic conductor, in what direction do the electrons flow with the application of a voltage?

Answer 6

Negative to positive (electron flow)

Question 7

What happens when an electron enters a conductor?

Answer 7

Another electron at the opposite end of the conductor is pushed out.

Question 8

If a current remains constant, would the number of electrons change if the cross sectional area changed?

Answer 8

Regardless of the cross sectional area the same amount of electrons will flow per second