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CHETANA PUBLICATION-Electromagnetic Induction-EXERCISE
- The core of a transformer is laminated
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- A step down transformer of efficiency 80% is used on a 1000V line to d...
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- Henry is equivalent to
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- The primary winding of transformer has 200 turns and its secondary win...
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- A transformer is used to reduce the main supply of 220 V to11 V. If th...
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- The ratio of the turns in the primary and secondary coils of transform...
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- A current in one coil changes from 5 A to 3 A in 0.2 sec and the co-ef...
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- The current in the coil changes from 3A to 6 A in 3sec. If the induced...
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- If south pole of the magnet is moved towards the coil then the nearer ...
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- The current in the choke coil decreasing at the rate of 3 A//s and cho...
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- The phenomenon of producing an induced e.m.f. in a conductor due to th...
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- Faraday's laws of electromagnetic induction is related to
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- To induce an e.m.f. in a coil, the magnetic flux
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- The co-efficient of self induction of a coil is the ratio of
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- The S.I. unit of inductance Henry can be written as
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- The number of turns in primary and secondary coil of transformer are 1...
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- Lenz's law is in accordance with law of conservation of
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- Magnetic flux associated with area element ds kept in magnetic inducti...
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- Induced e.m.f. produced in the coil is 4mV. What is the change in flux...
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- Foucault's current is also
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