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Design of a transformer for producing se...

Design of a transformer for producing separate secondary voltages from A.C main input.

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The primary coil of a transformer has 800 turns and the secondary coil has 8 turns. It is connected to a 220 V ac supply. What will be the output voltage?

The primary coil of a transformer has 800 turns and the secondary coil has 8 turns. I connected to a 220 V as supply. What will be the output voltage?

Knowledge Check

  • AC power is transmitted from a power house at a high voltage as

    A
    the rate of transmission is faster at high voltages
    B
    it is more economical due to less power loss
    C
    power cannot be transmitted at low voltages
    D
    a precaution against theft of transmission lines

  • A step-down transformer reduces the supply voltage from 220 V to 11 V and increase the current from 6 A to 100 A. Then its efficiency is

    A
    1.2
    B
    0.83
    C
    0.12
    D
    0.9

  • An ideal transformer has a power input of 10 kW. The secondary current is 25 A. If the ratio of the number of turns in the primary and the secondary coils is 5:1 then the potential difference applied to the primary is:

    A
    100 V
    B
    200 V
    C
    2000 V
    D
    1500 V

    • Similar Questions

    Explore conceptually related problems

    A radio set operates at 6 V DC . A transformer with 18 turns in the secondary coil is used to step down the input 220 V AC emf to 6 V AC emf . This AC emf is then rectified by another circuit to give 6 V DC which is fed to the radio. Find the number of turns in the primary.

    The primary of a transformer has 400 turns while the secondary has 2000 turns. If the power output from the secondary at 1100 V is 12.1 kW, calculate the primary voltage. If the resistance of primary is 0.2 Omega and that of secondary is 2Omega and the efficiency of the transformer is 90% calculate (i) heat loss in the primary coil, (ii) heat loss in the secondary coil.

    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.

    Is energy produced when a transformer steps up the voltage?

    Transformers either increase or decrease AC voltage. A. State the principle of a transformer. B. Explain with the help of a labelled diagram the working of a transformer C. Explain briefly any three energy losses in a transformer.

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