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A Rowland ring of mean radius 15 cm has ...

A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2 A?

A

2.5 T

B

5.45 T

C

4.48 T

D

1.56 T

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-APPENDICES ( REVISION EXERCISE )-REVISION EXERCISE (MOVING CHANGES & MEGNETISM)
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  2. A closely would solenoid of 2000 turns and area of cross-section 1.6xx...

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  3. A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ...

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  6. Three long straight and parallel wires carrying currents are arranged ...

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  12. A rectangular coil 6 cm long and 2 cm wide is placed in a magnetic fie...

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  13. A circular coil of 20 turns and radius 10 cm is placed in uniform magn...

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  14. A moving coil galvanometer 'A' has 200 turns and a resistance of 100Om...

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  16. A galvanometer has a resistance of 3663Omega. A shunt S is connected a...

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  18. A galvanometer has a resistance G and current I(a) flowing in it. Prod...

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  19. The deflection of a galvanometer falls to 1//10^(th) when a resistanc...

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