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

Primary coil of a transformer is connected to "220V" ac.Primary and secondary turns of the transforms are "100" and "10" respectively.Secondary coil of transformer is connected to two series resistances shown in figure.The output voltage (V_(0)) is :

An ideal transformer is connected to a 250 V AC mains and its output voltage is 25 V . This transformer is then used to light a bulb with ratings 60 W , 25 V. Calculate the current in the primary coil of the circuit.

A transformer has 50 turns in the primary and 100 in the secondary. If the primary is connected to a 220 V DC supply, what will be the voltage across the secondary?

A step-down transformer has 50 turns on secondary and 1000 turns on primary winding. If a transformer is connected to 220 V, 1A C AC source, then what is output current of the transformer ?

200 V AC is applied to primary coil of a transformer and it is found that output current is 8 A and output voltage is 50 V. Assume no energy loss. Find the current in primary coil I ampere.

An input voltage V_(i) of 0.20 V is applied to an operational amplifier connected as shown in the diagram. What is the output voltage V_(0) ?

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