Home
Class 12
PHYSICS
A transformer is having 2100 turns in pr...

A transformer is having 2100 turns in primary and 4200 turns is secondary. An ac source of 120 V, 10 A is connected to its primary. The secondary voltage and current are

A

240 V, 5A

B

120 V, 10 A

C

240 V, 10 A

D

120 V, 20 A

Text Solution

Verified by Experts

The correct Answer is:
A
`(e_(S))/(e_(P))=(n_(S))/(n_(P))`
`e_(S)=(4200)/(2100)xx120=240V`.
`I_(S)=(n_(P))/(n_(S))xxI_(P)=(2100xx10)/(4200)=5A`.
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos

  • ELECTRONS AND PHOTONS

    NIKITA PUBLICATION|Exercise MCQs|162 Videos

Similar Questions

Explore conceptually related problems

An ideal transformer has 100 turns in the primary and 250 turns in the secondary. The peak value of the ac is 28 V . The r.m.s. secondary voltage is nearest to

A transformer has 1500 turns in the primary coil and 1125 turns in the secondary coil. If a voltage of 200V is applied across the primary coil , then the voltage in the secondary coil is :

A transformer has 200 turns in primary coil and 600 turns in secondary coil. If a 220 V DC is applied across primary coil what will be the voltage across secondary coil.

A transformer has 100 turns in the primary and 500 turns in the secondary. If the primary is connected to 220V DC supply, then the voltage develop across the secondary will be

A transformer has 500 turns in the primary and 1000 turns in its secondary. The primary voltage is 200 V and load in secondary is 100 ohm. Calculate the current in primary assuming it to ideal transformer.

A transformer consists of 500 turn in primary coil and 10 turns in secondary coilk with the load of 10 Omega Find out current in the primary coil when the voltage across secondary coil 50V.

A transformer consists of 500 turn in primary coil and 10 turns in secondary coil with the load of 10Omega. Find out current in the primary coil when the voltage across secondary coil is 50 V.

An ideal transformer has 500 and 5000 turn in primary and secondary windings respectively. If the primary voltage is connected to a 6V battery then the secondary voltage is

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. An alternating voltage E=200sqrt(2)sin(100t) is connected to a 1 micro...

    Text Solution

    |

  2. Same current is flowing in two alternating circuits. The first circuit...

    Text Solution

    |

  3. In a circuit, the current lags behind the voltage by a phase differenc...

    Text Solution

    |

  4. Average power in the L-C-R circuit depends upon

    Text Solution

    |

  5. A transformer is having 2100 turns in primary and 4200 turns is second...

    Text Solution

    |

  6. When the number of turns and the length of the solenoid are doubled ke...

    Text Solution

    |

  7. When the current changes from +2A to -2A in 0.05s, and emf of 8B is in...

    Text Solution

    |

  8. An alternating voltage E = 200sqrt(2) sin (100 t)V is applied to a 2 m...

    Text Solution

    |

  9. In a series LCR circuit, at resonance, power factor is …….. .

    Text Solution

    |

  10. In series LCR circuit at resonance,

    Text Solution

    |

  11. The self inductane of coil of 400 turns is 8 mH. If current of 5 mA f...

    Text Solution

    |

  12. In LCR series circuit an ac emf of 2 volt and frequency 50 Hz is appli...

    Text Solution

    |

  13. A coil of self-inductance L is connected in series with a bulb B and a...

    Text Solution

    |

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

    Text Solution

    |

  15. If 'N' is the number of turns in a coil, the value of self inductance ...

    Text Solution

    |

  16. In LCR series circuit , an alternating emf e and current i are given b...

    Text Solution

    |

  17. In electromagnetic wave , according to Maxwell , changing electric fie...

    Text Solution

    |

  18. Same current is flowing in two alternating circuits. The first circuit...

    Text Solution

    |

  19. Two coils A and B have mutual inductance 2xx10^(-2) Henry if the cur...

    Text Solution

    |

  20. The capacity of a parallel plate air capacitor is 2 mu F and voltag...

    Text Solution

    |