The primary coil of a transformer with 954 turns carries an EMF of 2.2. If the secondary coil has 7847 turns, what is its EMF?

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The primary coil of a transformer has 480 turns, and the secondary has 112 turns. How much AC voltage must be applied to the primary to create an output voltage of 1.94 V in the secondary? (Unit = V) Voltage (V)

The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. The turns ratio of the transformer is 45:1. The primary coil is plugged into a standard 120-V outlet. The current in the secondary coil is 1.9 x 10-3 A. Find the power consumed by the air filter.

A step-up transformer is designed to produce 1840 V from a 112-V ac source. If there are 384 turns on the secondary coil, how many turns should be wound on the primary coil?   The number of turns that should be wound on the primary coil is ____

A transformer has a primary voltage of Vp= 400 V and primary current of Ip=1.5 A. If the measured values of secondary voltage and secondary current are Vs= 195 V and Is= 2.9A, respectively a) calculate the efficiency of this transformer. b) write the type of the transformer(step-up or step-down) with its reason.