# How do you find the primary voltage of a transformer?

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## What is the primary voltage of a transformer?

Primary voltage is the voltage applied to the terminals of the primary winding of a transformer. The energy applied to the primary must be in the form of a changing voltage which creates a constantly changing current in the primary, since only a changing magnetic field will produce a current in the secondary.

## How do you find the primary and secondary voltage of a transformer?

Solve the equation Vs/Vp = Ns/Np where Vs is the secondary voltage, Vp is the primary voltage, Ns is the number of secondary windings and Np is the number of primary windings. Divide the number of secondary windings by the number of primary windings, and multiply the source voltage by this ratio.

## How do you find the primary power of a transformer?

If for some reason you need a larger transformer to operate appliances, you still divide the wattage by the voltage to find the current. For a 120-volt primary, 2000-watt transformer, divide 2000 by 120 for the current (2000 Watts /120 volts =16.67 amps). For a 240-volt, 3000-watt transformer, the current is 12.5 amps.

## How do you find primary voltage?

The primary voltage is equal to the product of the secondary voltage and primary current divided by secondary current. The secondary voltage is equal to the product of the primary voltage and primary current divided by secondary current.

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## How do you calculate windings on a transformer?

Once you have the resistance of a winding, you simply calculate the voltage drop across that winding by multiplying the resistance by the current in the winding. In this primary it would be 2.44 Ω x 0.22 A = 0.540 V. Calculate the voltage drop across each winding in the same manner.

## How do you find the secondary voltage of a transformer?

The secondary voltage was measured through a Tektronix P6015 high-voltage probe with 1000:1 attenuation attached to a socket that is plugged to the end of the plasma antenna. The secondary current is measured by a Pearson 411 current transformer on the wire between the secondary coil and the plasma antenna.

## How do you find voltage?

If the current (I) and resistance (R) of any circuit is given we can mold the current formula to calculate the voltage, i.e., V = IR (Volts).