In step-up transfomer, the relation between number of turns in primary `(N_(p))` and number of turns in secondary `(N_(S))` coils is

In a step down transformer, the number of turns in the primary is always

In step down transformers, the number of turns in primary is less than in the secondary

In the secondary coil of step-up transformer , the number of turns are ___

A transformer whose efficiency is 90%, draws 5 A when 200 V is applied to its primary coil. If output is drawn at 300 V, what is the current in secondary coil ? If number of turns in primary coil is 500, what is the number of turns in secondary coil?

In a stepup transformer, the ratio of number of turns in primary and secondary coils is 1 : 10 . What voltage will develop in the secondary if the primary is connected to 220 V mains ? If the current drawn from the secondary is 2A, calculate the current through the primary

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?

The input voltage and output voltage in the primary and secondary coils of a transformer are 250 V and 5 V, respectively. If the number of turns in the primary coil of the transformer is 1000, find the number of turns in its secondary coil. Also mention, whether the transformer is a step-up one or a step-down one ?

A step - up transformer is used on 120 V line to provide a potential difference of 2400 V . If the number of turns in the primary is 75, then the number of turns in the secondary shall be