Power, Resonant || Transformer

Assertion : An ideal transformer does not vary the power. Reason : An transformer is used to step-up or step-down ac voltages.

Power in AC||Transformer

A step down transformer connected to an ac mains supply of 220V is made to operate at 11V, 44W lamp. Ignoring power losses in the transformer what is the current in primary circuit.

A: The power output of a practical transformer is always smaller than the power input. R: A transformer works on the principle of mutual induction.

Resonance|| Damped Harmonic Oscillation|| Forced Harmonic Oscillation|| Transformer

Which among the following, is not a cause for power loss in a transformer-

2000V- 200V, 20kVA transformer has 66 turns in the secondary. Calculate the primary and secondary full-load current, neglect power losses in transformer.

Resonance||Damped Harmonic Oscillation||Forced Harmonic Oscillation||Transformer

LCR Circuit| Power Factor| Power | Resonance and Properties of LCR circuit

The output power in step-up transformer used in practice is