Transformers Flashcards
1
Q
What are transformers used for?
A
To step up or step down alternative current (AC)
2
Q
Why don’t transformers work for DC?
A
Does not work with DC because it is static so does not induce a current
3
Q
How do AC transformers work?
A
- An alternative voltage is applied to the primary coil, which forces an AC to flow in the coil - This produce a continually changing magnetic field in the soft iron core - The field cuts through the secondary coil and induces an alternative voltage with it. This forces an alternative current to flow
4
Q
How do you strength the magnetic field?
A
A laminated iron core strengths the magnetic field and also reduces heat lost
5
Q
What does a Step Up Transformer do?
A
Used to Increase Voltage
6
Q
What does a Step Down Transformer do?
A
Used to Decrease Voltage
7
Q
How many turns are on the coil in Step Up Transformers?
A
There are less turns on the primary coil than the secondary coil.
8
Q
How many turns are on the coil in Step Down Transformers?
A
There are more turns on the primary coil than the secondary coil.
9
Q
What is the equation for Transformers?
A
