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प्रश्न
State the mathematical relation between a number of turns in the primary coil to a secondary coil in the step-up transformer.
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उत्तर
In a step-up transformer, the number of turns in the secondary coil is more than that in the primary coil (NS > NP).
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संबंधित प्रश्न
State the principle on which transformer works.
Draw a labeled diagram of a step-down transformer.
State the principle of the step-down transformer and its working.
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State the principle of transformer working with the help of a diagram
The primary coil of an ideal step-up transformer has 100 turns and the transformation ratio is also 100. The input voltage and power are 220 V and 1100 W, respectively. Calculate the
(a) number of turns in secondary
(b) current in the primary
(c) a voltage across secondary
(d) current in secondary
(e) power in secondary
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State whether true or false. If false, correct the statement.
A transformer can step up direct current.
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Reason: D.C. changes neither in magnitude nor in direction.
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The value of voltage across the secondary coil is ______.
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A transformer is used ______
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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 type of transformer is used in a mobile phone charger?
A 12 V, 60 W lamp is connected to 220 V AC via an ideal transformer. Find the primary current.
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