Home
Class 12
PHYSICS
The output power in step-up transformer ...

The output power in step-up transformer used in practice is

A

greater than the input power

B

equal to the input power

C

less than the input power

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    TARGET PUBLICATION|Exercise EVALUATION TEST|8 Videos
  • ELECTROMAGNETIC INDUCTION

    TARGET PUBLICATION|Exercise CRITICAL THINKING|84 Videos
  • ELASTICITY

    TARGET PUBLICATION|Exercise Evaluation test|14 Videos
  • ELECTROSTATICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|14 Videos

Similar Questions

Explore conceptually related problems

A step up transformer is used to

Step-up transformers are used for

The rms value of input voltage in a full wave rectifier is 12 V determine the output voltage if a step up a transformer with ratio 1:2 is used

A transformer with 20 turns in its secondary coil is used to step down the input 220 V ac emf. The output of the transformer is fed to a rectifier circuit which convents the ac input into dc output. The input and output of rectifier are as shown in Figure (there is no change in peak voltage). The rectifier output has an average emf of 8.98 volt. Calculate the number of turns in the primary coil of the transformer.

The output of a step-down transformer is measured to be 24 V when connected to a 12 watt light bulb. The value of the peak current is

The output of a step down transformer is measured to be 48V when connected to a 12W bulb. The value of peak current is

The transformer ratio of a step up transformer is

The difference in the working of a step up transformer and an amplifier is

A thermal power plant produed electric power of 600kW at 4000V, which is to be transported to a place 20 km away form the power plant for consumer's usage. It can be transported either directly with a cable of large current carrying capacity or by sing a combination of step-up and step-down transfprmers at the two ends. THe drawback of the direct transmission is the large energy dissipation. In the method wsing transformers, the dissipatiion is much smaller. In this method a step-up transformers is used at the plant side so that the current is reduced to a smaller value. At the consumers'end, a step-down transformer is used to supply power to the consumers at the specified lower voltage. It is reasonable to assume that the power cable is purely resostive and the transformers are ideal with power factor unity. All the currents and voltagementioned are values. If hte direct transmission method with a cable of resistance 0.4(omega) km^(-1) is used, the power dissipation (in %) during transmission is

TARGET PUBLICATION-ELECTROMAGNETIC INDUCTION-COMPETITIVE THINKING
  1. Two coils P and Q are kept near each other. When no current flows ...

    Text Solution

    |

  2. A 100 Omega resistance and a capacitor of 100 Omega reactance are conn...

    Text Solution

    |

  3. The output power in step-up transformer used in practice is

    Text Solution

    |

  4. What is increase in step-down transformer?

    Text Solution

    |

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

    Text Solution

    |

  6. An ideal transformer converts 220V a.c. to 3.3kV a.c. to transmit a po...

    Text Solution

    |

  7. A transformer connected to 220 volt line shows an output of 2A at 1100...

    Text Solution

    |

  8. A 220 V input is supplied to a transformer. The output circuit draws a...

    Text Solution

    |

  9. A transformer has an efficiency of 80%. It works at 4 kW and 100 V. If...

    Text Solution

    |

  10. Assertion : A transformer cannot work on dc supply. Reason : dc chan...

    Text Solution

    |

  11. A step-down transformer has 50 turns on secondary and 1000 turns on pr...

    Text Solution

    |

  12. A step up transformer operates on a 230 V line and a load current of 2...

    Text Solution

    |

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

    Text Solution

    |

  14. The output of a step down transformer is measured to be 48V when conne...

    Text Solution

    |

  15. A coil has 2000 turns and area of 70cm^(2). The magnetic field perpen...

    Text Solution

    |

  16. In a region of uniform magnetic induction B=10^(2) tesla, a circular c...

    Text Solution

    |

  17. Alternating current can not be measured by D.C. Ammeter because

    Text Solution

    |

  18. If E(0) represents the peak value of the voltage in an ac circuit, the...

    Text Solution

    |

  19. The rms value of current in a 50Hz AC circuit is 6A. The average value...

    Text Solution

    |

  20. An alternating voltage E=200sqrt(2) sin (100 t)V is connected to a 1 m...

    Text Solution

    |