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प्रश्न
When the current changes from +2A to −2A in 0.05 s, an emf of 8 V is induced in a coil. The co-efficient of self-induction of the coil is
विकल्प
0.2 H
0.4 H
0.8 H
0.1 H
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उत्तर
0.1 H
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संबंधित प्रश्न
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Define self-inductance of a coil interms of
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Give the physical significance of self-inductance of a coil.
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Determine the self-inductance of 4000 turn air-core solenoid of length 2m and diameter 0.04 m.
A 200 turn circular coil of radius 2 cm is placed co-axially within a long solenoid of 3 cm radius. If the turn density of the solenoid is 90 turns per cm, then calculate mutual inductance of the coil and the solenoid.
The solenoids S1 and S2 are wound on an iron-core of relative permeability 900. The area of their cross-section and their length are the same and are 4 cm2 and 0.04 m, respectively. If the number of turns in S1 is 200 and that in S2 is 800, calculate the mutual inductance between the coils. The current in solenoid 1 is increased from 2A to 8A in 0.04 second. Calculate the induced emf in solenoid 2.
