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The magnetic flux linked with a coil (in...

The magnetic flux linked with a coil (in Wb) is given by the equation `phi = 5t^2 + 3t +16` . The magnetic of induced emf in the coil at fourth second will be

A

145 V

B

43 V

C

10 V

D

108 V

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-ELECTROMAGNETIC INDUCTION-EXERCISE-II
  1. A magentic field of 2xx10^(-2) T acts at right angles to a coil of are...

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  2. A magnetic flux of 500 microweber passing through a 200 turn coil is r...

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  3. The magnetic flux linked with a coil (in Wb) is given by the equation ...

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  4. A rectangular coil of 20 turns and area of cross-section 25sq. Cm has ...

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  5. In a magnetic field of 0.05 T, area of a coil changes from 101 cm^(2) ...

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  6. A coil of 40 Omega resistance, 100 turns and radius 6 mm is connected ...

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  7. A magnetic field of 5xx10^(-5) T is produced at a perpendicular distan...

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  8. The number of turns in the coil of an AC generator is 5000 and the are...

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  9. A circular coil of area 8 m^(2) and number of turns 20 is placed in a ...

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  10. A coil having 500 square loops each of side 10 cm is plance normal to ...

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  11. The Wing span of an aeroplane is 20 metre . It is flying in a fie...

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  12. A small piece of metal wire is dragged across the gap between the pole...

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  13. A copper disc of radius 0.1 m is rotated about its natural axis with 1...

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  14. A wheel with 10 metallic spokes each 0.5 m long is rotated with a spee...

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  15. An E.M.F of 5 V is produced in an inductor, when the current changes a...

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  16. A coil has a self-inductance of 0.05 henry. Find magnitude of the emf ...

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  17. A long solenoid has 1000 truns. When a current of 4A flows through it...

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  18. Calculate the equivalent resistance between the points A and B in Fig.

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  19. If a change in current of 0.01 A in one coil produces a change in ma...

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  20. The current in a coil is changed from 5A to 10A in 10^(-2)s. Then, an ...

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