Circuits

Question 1

What is thermionic emission?

Answer 1

The outflow of electrons into a vacuum from a heated electric conductor (or liberation of electrons from a substance due to heating)

Question 2

What are the inductor and capacitor equivalent to at steady-state for a DC circuit?

Answer 2

Capacitors behave as open circuits and pass no current.
Inductors behave as short circuits and has no voltage drop.

Question 3

What does the potential difference depend on if a conductor passes through a magnetic field?

Answer 3

1. Speed with which the conductor cuts the magnetic field.
2. Length of conductor
3. Magnetic field density.

Question 4

What are the characteristics of electric work?

Answer 4

1. Work is not a function of the path taken.
2. No work is done in moving the electron horizontally.
3. Work is performed by moving only in the vertical direction.