Advertisements
Advertisements
प्रश्न
State two causes of energy loss in a transformer.
Advertisements
उत्तर
Causes of energy loss in a transformer:
1) Eddy currents developed in the core.
2) Hysteresis loss because of repeated magnetisation and demagnetisation of the iron core.
APPEARS IN
संबंधित प्रश्न
Name a device that helps to maintain a potential difference across a conductor.
What is the unit of electric charge?
What is Ohm's law? Explain how it is used to define the unit of resistance.
What p.d. is needed to send a current of 6 A through an electrical appliance having a resistance of 40 Ω?
If the potential difference between the end of a wire of fixed resistance is doubled, by how much does the electric power increase?
Calculate the power used in the 2 Ω resistor in each of the following circuits: a 6 V battery in series with 1 Ω and 2 Ω resistors.
The following table shows current in Amperes and potential difference in Volts.
What will be the nature of the graph between the current and potential difference? (Do not draw a graph.)
Suppose there are three resistors A, B, and C having resistances r1, r2, and r3 respectively. If R represents their equivalent resistance, establish the following relation R = r1 + r2 + r3 when joined in series.
A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is stretched to double its length?
Name a device that helps to maintain a potential difference across conductors.
