In step down transformer 220 `//` 110 V the primary is connected to 10V battery. The out put voltage is

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 step-down transformer having primary to secondary turn ratio 10:1, the input voltage applied is 250V and outout current is 10 A. Assuming 100% efficiency, calculate the (i) voltage across secondary coil (ii) current in primary coil (iii) power output

An ideal transformer has 500 and 5000 turn in primary and secondary windings respectively. If the primary voltage is connected to a 6V battery then the secondary voltage is

A step down transformer reduces 220 V to 110 V. The primary draws 5 ampere of current and secondary supplies 9 ampere. The efficiency of transformer is

The primary and secondary voltage of an ideal step down transformer are 200 V and 25V respectively. The secondary is connected to a device, which draws a current of 2A. What is the current in the primary?

The turns ratio of a transformer is 12.5. If its primary is connected with a.c. mains of 220 V, determine the voltage obtained across the secondary.

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 .

Primary of a transformer is connected to .5 V dry cell. What will be the output voltage?

In a step up transformers, 220V is converted into 200V . The number of turns in primary coil is 600 . What is the number of turns in the secondary coil?