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Question
Write the function of a transformer.
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Solution
A transformer is a device that changes or transforms a low alternating voltage into a high alternating voltage or vice versa.
RELATED QUESTIONS
Why is the iron core of a transformer made laminated (thin sheets) instead of being in one solid piece?
Name the principle on which functioning of a transformer depends.
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A transformer is essentially an a.c. device. It cannot work on d.c. It changes alternating voltages or currents. It does not affect the frequency of a.c. It is based on the phenomenon of mutual induction. A transformer essentially consists of two coils of insulated copper wire having different numbers of turns and wound on the same soft iron core.
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The value of current in the bulb is ______.
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An iron rod is placed parallel to magnetic field of intensity 2000 Am-1. The magnetic flux through the rod is 6 × 10−4 Wb and its cross-sectional area is 3 cm2. The magnetic permeability of the rod in Wb A-1m-1 is ______.
The self-inductance of a closely wound coil of 200 turns is 10 mH. Determine the value of magnetic flux through the cross-section of the coil when the current passing through the coil is 4 mA.
What is a transformer?
How do the input and output powers in a transformer compare? State the assumption made.
