A transformer has a turns ratio of 5:1. If the primary voltage is 85.0 V , what is the secondary voltage?.?
Secondary voltage 17 Volts (85/5 = 17)
If the primary power of a transformer have a 2:1 p-s voltage ratio is 100W, the secondary power is?
Assuming an ideal transformer and power factor = 1, the secondary is 100W. A transformer does not transform power, but voltage and current. A step-down (2:1 ratio) transformer steps down voltage, but steps up current.
A step up transformer has a turns ratio of 15:5. The input voltage is 110 volts and the input current is 6?
A step up transformer has a turns ratio of 15:5. The input voltage is 110 volts and the input current is 6? Power = Volts * Current As the electric current moves around a circle (turns) in wires in the primary coil, a magnetic field is produced. The energy of this magnetic field is directly proportional to the voltage of the primary coil. The direction of field is perpendicular to the plane of the circle. This magnetic field expands out from the primary coil to the secondary coil. As the magnetic field crosses the wires in the turns of the secondary coil, the energy of the magnetic field induces a voltage in the wires in the turns in the secondary coil. This voltage provides energy that causes the electrons to move in the wires in the turns in the secondary coil. The motion of the electrons is measured as the current. A step up transformer has a turns ratio of 15:5. The input voltage is 110 volts and the input current is 6? Power = Volts * Current Input power = 110 * 6 = 660 watts Assuming 100% efficiency, which means all the power is transferred from the primary coil to the secondary coil, the output power = 660 watts. As the current moves around 1 circular turn, a specific amount of magnetic field energy is produced. The turns ratio = 15 : 5, this means the voltage ratio = 15 : 5 = 3 : 1! Input voltage = 110 volts, output voltage = ⅓ * 110 = 36⅔ volts Input current = 6 amps, output current = 3 * 6 = 18 amps Output power = output voltage * output current = 36⅔ * 18 = 660 watts Output power = input power OK