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The core of any transformer is laminated...

The core of any transformer is laminated so as to

A

ratio of voltage in primary and secondary may be increased

B

energy losses due to eddy currents may be minimised

C

the weight of the transformer may be reduced

D

rusting of the core may be prevented

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The correct Answer is:
B
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NARAYNA-ELECTROMAGNETIC INDUCTION-EXERCISE-3
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  2. Two coils of self-inductance 2mH and 8 mH are placed so close togethe...

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  3. The core of any transformer is laminated so as to

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  4. A transistor -oscillator using a resonant circuit with an inductor L (...

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  5. The primary and secondary coils of a transmformer have 50 and 1500 tur...

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  6. A transformer is used to light a 100 W and 110 V lamp from a 220V main...

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  7. What is the value of inductance L for which the current is a maximum i...

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  8. The primary and secondary coils of a transmformer have 50 and 1500 tur...

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  9. A long solenoid has 500 turns. When a current of 2A is passed through ...

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  10. A circular disc of radius 0.2 m is placed in a uniform magnetic fied...

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  11. A long solenoid has 500 turns. When a current of 2 A is passed through...

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  12. A conducting circular loop is placed in a uniform magnetic field 0.04T...

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  13. A rectangular, a square , a circular and an elliptical loop, all in th...

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  14. Which of the following figure correctly depicts the Lenz’s law. The ar...

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  15. A conducting circular loop is placed in a uniform magnetic field, B=0....

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  16. A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz f...

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  17. The current i in a coil varies with time as shown in the figure. The v...

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  18. The current (I) in the inductance is varying with time according to th...

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  19. A coil of resistance 400Omega is placed in a magnetic field. If the ma...

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