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The primary and secondary coils of a tra...

The primary and secondary coils of a transmformer have `50` and `1500` turns respectively. If the magnetic flux `phi` linked with the primary coil is given by `phi=phi_(0)+4t`, where `phi` is in weber, `t` is time in second and `phi_(0)` is a constant, the output voltage across the secondary coil is

A

30 volts

B

90 volts

C

120 volts

D

220 volts

Text Solution

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The correct Answer is:
c
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MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-4| Section A (Prevous Years Problems )
  1. The primary and secondary coils of a transmformer have 50 and 1500 tur...

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

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

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

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

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

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

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

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

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  10. A solenoid of radius R and length L has a current I = I​0 cosωt. The v...

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

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  12. The current (I) in the inductance is varying with time acroding to the...

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  13. In a coil of resistance 10 ohm , the induced current developed by chan...

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  14. A wire loop is rotated in magneitc field. The frequency of change of d...

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  15. A transformer having efficiency of 90% is working on 200 V and 3 kW po...

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  16. The time constant of a circuit is 10 sec , when a resistance of 10 Ome...

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  17. A conducting square frame of side 'a' and a long straight wire carryin...

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  18. An electron moves on a straight line path XY as shown. The abcd is a a...

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  19. A solenoid having 500 turns and length 2 m has radius of 2 cm , the se...

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  20. Find the dimensions of inductance :-

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