A step-up transformer increases (or "steps up") the voltage of an alternating electrical current. For example, a step-up transformer could be used to increase 120V AC to 277V AC to provide power to 277V electrical equipment in a building that does not already have a 277V electrical system.
Other examples where a step-up transformer might be used include these:
An electrical transformer can step up (or step down) the voltage.
If you mean in domestic use, the US is at 120 V and the UK at 240 V. So you need a transformer with a 2 to 1 turn ratio, to step up if using a UK appliance in the US, or to step down if using a US appliance in the UK.
Yes. The Va numbers indicate the rating of the transformer (12VA indicates that you can draw upto 12/24 = 1/2 Amps at 24 volts and 20VA indicates that you can draw about 20/24 = 0.83 Amps). Usually 20va transformer will cost more than the 12va transformer. So, unless a higher power output is required, it is adequate to use the lower rating transformer. However, you cannot go the other way - if you use a 12va transformer in-lieu of the 20va one, if the application needs more power, then you have a reliability problem. The transformer will have more loss, heat-up and then eventually burn out.
Depending on your application... Use a voltage dividor (two resistors) if it doesn't draw a lot of current. You could also try a voltage regulator or using an op amp as a buffer, with the input the voltage you want. That voltage could come from a voltage divider, since op amps draw extremely low current.
High alternating voltage will be reduced to low alternating one. Such step down transformers are used in power adaptors for electronic devices such as video games etc
When transformer is used in step up mode then we can use transformer as amplifire
When transformer is used in step up mode then we can use transformer as amplifire
Nothing. The same rating is applicable.
Frequency does not change when you use a step-up or step-down transformer. Only current and voltage is changed.
A step up transformer is used to step up an AC voltage
Transformers, step up or step down, use mutual induction in their operation.
A transformer is used to step up or step down a Voltage supply.
A transformer that increases voltage is a step-up transformer.
Transformer function is either to step-up or down the voltage. There is nothing like an ordinary transformer.
step up transformer is to icrease the voltage but keeping the frequency same. step down is use to get less voltage than input given but of same frequency. Generally step down is use,we reqiure it in oor house(in mobile charger etc.).It is also use in rectifires.
A transformer has a primary and a secondary side. There is a ratio of windings from one side to the other that dictates whether it is a step up or step down transformer. The transformer is usually marked as to the input and output specifications. The current is directly proportional to voltage. If you had a transformer that was a step up from primary to secondary, it would be step down from secondary to primary.
Yes a Tesla coil or ignition coil is an example.