Transformers and linear regulators Flashcards
1
Q
What are transformers used for
A
Converting from AC at one level to AC at another level
AC-AC conversion
2
Q
What are some advantages of transformers
A
Electrically safe and very high efficiencies (98%)
3
Q
What are some disadvantages of transformers
A
Large and bulky, loud
4
Q
How would you relate E (e.m.f on coil) with voltage, current and number of turns on the coil
A
E1/E2 = V1/V2 = N1/N2 = I2/I1
5
Q
What is the equation for efficiency of a transformer
A
efficiency = (output power)/(output power + copper losses + iron losses)
6
Q
When would regulation take place
A
Between smoothing and protection
7
Q
Where would a linear regulator be found
A
Between smoothing capacitor and load
