Here's how the formula goes.
V1=Primary Voltage
N1=Primary Winding
V2=Secondary Voltage
N2=Secondary Winding
V2 N2 25 100 (25)x 25 100
---- = ---- (=) ----- = ----- (=) ----- = ------ (=) V1= 25x (20/100)
V1 N1 V1 20 V1 20
Step1 (=) V1= 25 x (20/100) --Divide--
Step2 (=) V1= 25 x (0.2) --Multiply--
Answer
V1= 5
Transformer step-up/step-down voltage is turns-ratio, so if a transformer has 20 primary windings and 100 secondary windings (a turns-ratio of 1 to 5) and the secondary voltage is 25, then is the primary voltage is 5.
If a transformer has 20 primary windings and 100 secondary windings, it is a step up transformer. If the secondary voltage is 25v, the primary voltage will be 5v, because the turns ratio is 20 to 100, or 1 to 5.
primary and secondary coilsAnswerPrimary and secondary windings.
it has three primary windings & three secondary windings.
Voltage on primary/Primary turns = Voltage on secondary/Secondary turns
125 v
The primary and secondary windings of a mutual transformer are electrically isolated, and should have 'infinite' resistance between them when measured appropriately (which depends on voltage ratings of the windings).
It depends on the type of transformer.If it is a step up transformer the number of turns in secondary side is higher than primary.Stepdown means it will have fewer number of windings on the secondary side turns when compared with the primary side.An isolation transformer has the same number of windings on the primary as the secondary.The ratio of the windings is proportional to the increase or decrease in the secondary voltage. For example, twice the windings doubles the voltage and 1/2 the windings halves the secondary voltage. The isolation transformer is denoted as 1:1 and has the same voltage on the secondary as the primary.The ratio of secondary turns to primary turns is the same as the ratio of secondary voltage to primary voltage.e.g. if the secondary to primary turns ratio is 1/10, then the secondary voltage will be one tenth of the primary voltage.
The # of windings in a transformer are based on the primary and secondary voltages the transformer is rated for not the way the windings are connected.
The difference between the two transformers is the coil ratios between the primary and secondary windings. A transformer that increases voltage from primary to secondary has more secondary winding turns than primary winding turns and is called a step-up transformer. Conversely, a transformer with fewer secondary windings does just the opposite and is called a step-down transformer.
The secondary voltage in a transformer is stepped up by having more turns in the secondary coil compared to the primary coil. This creates a higher electromagnetic induction which leads to a higher output voltage. The ratio of the number of turns in the primary coil to the number of turns in the secondary coil determines the degree of voltage stepping up.
A step-up transformer needs more turns on the secondary windings than on the primary windings to increase the voltage.