In a step up transformer, the input voltage is 300 V and the output voltage is 15 KV. Then the ratio of the number of turns in the primary to that in the secondary is

In a step-down transformer the input voltage is 22 kV and the output voltage is 550 V. The ratio of the number of turns in the secondary to that in the primary is

In a step - down transformer the input voltage is 22kV and the output voltage is 550V The ratio of the number of turns in the secondary to that in the primary is .

In step-up transformer the output voltage is 11 kV and the input voltage is 220 V. The ratio of number of turns of secondary to primary is:

In a step-down transformer input voltage is 200 volts and output voltage 5 volt. The ratio of nubmer of turns in it will be -

In a step-down transformer input voltage is 200 volts and output voltage 5 volt. The ratio of nubmer of turns in it will be -

If the input voltage of a transformer is 2500 volts and output current is 80 ampere . The ratio of number of turns in the primary coil to that in secondary coil is 20 : 1 . If efficiency of transformer is 100 % , then the voltage in secondary coil as :

If the input voltage of a transformer is 2500 volts and output current is 80 ampere . The ratio of number of turns in the primary coil to that in secondary coil is 20 : 1 . If efficiency of transformer is 100 % , then the voltage in secondary coil as :

In an ideal step down transformer, the input voltage is 400V and the output voltage is 20 V. The output voltage is used to operate a device, having an impendance of 100 ohms. What is the current in the primary circuit?

In a transformer the output current and voltage are respectively 4 A and 20V . If the ratio of number of turns in the primary to secondary is 2:1 what is the input current and voltage?