Home
Class 12
PHYSICS
A transformer having efficiency of 90% i...

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply.If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are

A

300 V, 15 A

B

450 V, 15 A

C

450 V, 13.5 A

D

600 V, 15 A

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF MATTER AND RADIATION

    SARAS PUBLICATION|Exercise EXAMPLE|27 Videos

  • ELECTROMAGNETIC WAVES

    SARAS PUBLICATION|Exercise EXAMPLE|15 Videos

Similar Questions

Explore conceptually related problems

A transformer has an efficiency of 80% and works at 100 V and 4 kW. The secondary voltage is 240 V. Calculate the current in the primary and secondary.

In a transformer, the number of turns in the primary and the secondary are 410 and 1230 respectively. If the current in primary is 6A, then that in the secondary coil is

In a transformer, the number of truns in the primary and the secondary are 410 and 1230 respctively. If the current in primary is 6A, then that in the secondary coil is:

A transformer has 50 turns in the primary and 100 in the secondary. If the primary is connected to a 220 V DC supply, what will be the voltage across the secondary?

A step down transformer increases the input current 4 A to 24 A at the secondary. If the number of turns in the primary coil is 330, the number of turns in the secondary coil is

The primary of a transformer when connected to dc battery of 10 volt draws a current of 1 mA.The number of turns of the primary and secondary windings are the current drawn by the circuit in the secondary are respectively

An a.c voltage of 300V applied to the primary of a transformer & voltage of 3000V is obtained from the secondary coil. Calculate the ratio of circuit in the primary & secondary coils.

SARAS PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS-EXAMPLE
  1. If voltage across a bulb rated 220Volt-100 Watt drops by 2.5% of its r...

    Text Solution

    |

  2. The current (I) in the inductance is varying with time according to t...

    Text Solution

    |

  3. Transfer characteristics output voltage (V0) vs input voltgae (V1) for...

    Text Solution

    |

  4. In an electrical circuit, R, I, C and AC voltage source are all connec...

    Text Solution

    |

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

    Text Solution

    |

  6. Ten identical cells connected in series are needed to heat a wire of l...

    Text Solution

    |

  7. A current of 2.5 A flows through a coil of inductance 5 H The magnetic...

    Text Solution

    |

  8. The primary of a transformer when connected to dc battery of 10 volt d...

    Text Solution

    |

  9. Two cities are 150 km apart Electric power is sent from one city to an...

    Text Solution

    |

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

    Text Solution

    |

  11. A resistane 'R' draws power 'P' when connected to an AC source.If an i...

    Text Solution

    |

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

    Text Solution

    |

  13. An electron moves on a straight line path XY as shown in the figure. T...

    Text Solution

    |

  14. In the given figure, a diod D is connected to an external resistance R...

    Text Solution

    |

  15. Two metal wires of identical dimensions are connected in ser...

    Text Solution

    |

  16. A circuit contains an ammeter, a battery of 30 V and a resistance 40.8...

    Text Solution

    |

  17. Which of the following combinations should be selected for better tuni...

    Text Solution

    |

  18. The potential differnces across the resistance capacitance and inducta...

    Text Solution

    |

  19. In a common emitter transistor amplifier the audio signal voltage acro...

    Text Solution

    |

  20. Figure shows a circuit that contains three identical resistor with re...

    Text Solution

    |