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State the principle on which transformer works.
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Explain the construction and working of the transformer.
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Derive an expression for ratio of e.m.f.s and currents in terms of number of turns in primary and secondary coil.
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Explain Maxwell distribution of molecular speed with necessary graph.
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State Ampere’s circuital law.
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State Ampere’s circuital law.
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Derive an expression for e.m.f. and current in terms of turns ratio
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A transformer converts 240 V AC to 60 V AC. The secondary has 75 turns. The number of turns in primary are _______.
(A) 600
(B) 500
(C) 400
(D) 300
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Obtain an expression for magnetic induction along the axis of the toroid.
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Explain Ampere’s circuital law.
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What is gamma decay?
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Sample of carbon obtained from any living organism has a decay rate of 15.3 decays per gram per minute. A sample of carbon obtained from very old charcoal shows a disintegration rate of 12.3 disintegrations per gram per minute. Determine the age of the old sample given the decay constant of carbon to be 3.839 × 10−12per second.
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The primary and secondary coils of a transformer each have an inductance of 200 x 10-6 H. The mutual inductance between the windings is 4 x 10-6 H. What percentage of the flux from one coil reaches the other?
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A circular coil of 100 turns with a cross-sectional area of 1 m2 is kept with its plane perpendicular to the magnetic field of 1 T. The magnetic flux linkage is ______.
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Describe alpha decay and write down the formula for the energy generated in this decay.
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Complete the following equation describing nuclear decay.
\[\ce{_88^226Ra->_2^4\alpha {+}}\] ______.
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Complete the following equation describing nuclear decay.
\[\ce{_8^19O->e^- { +}}\] _____
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Complete the following equation describing nuclear decay.
\[\ce{_90^228Th->\alpha { +}}\] _____
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Complete the following equation describing nuclear decay.
\[\ce{_7^12N -> _6^12C {+}}\] ______
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A particle executes S.H.M. of 2 cm. At the extreme position, the force is 4 N. What is the force at a point midway between mean and extreme positions?
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