Home
Class 12
PHYSICS
In the induction coil, across secondary ...

In the induction coil, across secondary coil the output voltage is practically

A

unidirectional, high, intermittent

B

unidirectional, low, intermittent

C

unidirectional, high, constant

D

unidirectional, low, constant

Text Solution

Verified by Experts

The correct Answer is:
A
In induction coil, current dies out and iron core is demagnetised and rate of withdrawl of flux becomes very large and consequently large emf is induced in the secondary. Hence, the current in the secondary is intermittent but unidirectional and has been used for the production of cathode rays and X-rays.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Example 30|1 Videos

  • ELASTICITY

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CORNER|16 Videos

  • ELECTRONS AND PROTONS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CORNER|19 Videos

Similar Questions

Explore conceptually related problems

Self inductance is of primary and secondary of an ideal transformer are L and 4L respectively. If current through the primary coil is i=I_0sinomegat then induced EMF across secondary coil due to current variation in the primary coil at t=pi/(3omega)s is

A transformer having efficiency of 80% is working on 200 V and 2 kW power supply. If the current in the secondary coil is 8A, the voltage across the secondary coil and the current in the primary coil respectively are

A transformer consisiting of 300 turns in the primary and 150 turns in the secondary gives output power of 2.2 kw. If the current in the secondary coil is 10 A, then the input voltage and current in the primary coil are:

A transformer has 800 loops in its primary coil and 8,000 loops in its secondary coil What would be the voltage in the primary coil if the- voltage in the.secondary coil is 20,000V.

The number of the turns in the primary coil of a transformer is 10 times than the same in the secondary coil . If the voltage across the primary is 20 V then find the voltage across the secondary .

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

In a step-down transformer having primary to secondary turn ratio 10:1, the input voltage applied is 250V and outout current is 10 A. Assuming 100% efficiency, calculate the (i) voltage across secondary coil (ii) current in primary coil (iii) power output

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTROMAGNETIC INDUCTION-MHT CET CONER
  1. When a rod of length l is rotated with angular velocity of omega in a ...

    Text Solution

    |

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

    Text Solution

    |

  3. In an AC circuit, the instantaneous values of e.m.f and current are e...

    Text Solution

    |

  4. An alternating voltage E=200sqrt(2)sin(100t) is connected to a 1 micro...

    Text Solution

    |

  5. What is the value of inductance L for which the current is a maximum i...

    Text Solution

    |

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

    Text Solution

    |

  7. In any AC circuit the emf (e) and the current (i) at any instant are g...

    Text Solution

    |

  8. If coil is opened, then L and R become

    Text Solution

    |

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

    Text Solution

    |

  10. A step down transformer converts transmission line voltage from 2200 V...

    Text Solution

    |

  11. In an ac circuit, the current lags behind the voltage by pi//3. The co...

    Text Solution

    |

  12. In an RLC circuit, capacitance is changed from C to 2C. For the resona...

    Text Solution

    |

  13. The flux associated with coil changes from 1.35 Wb to 0.79 Wb within (...

    Text Solution

    |

  14. In the induction coil, across secondary coil the output voltage is pra...

    Text Solution

    |

  15. A helicopter rises vertically upwards with a speed of 100 m//s. If the...

    Text Solution

    |

  16. The current, which does not contribute to the power consumed in an AC ...

    Text Solution

    |

  17. If a current of 10 A flows in one second through a coil and the induce...

    Text Solution

    |

  18. If an AC main supply is given to be 220V. What would be the average e....

    Text Solution

    |

  19. The current in a coil of inductance 5H decreases at the rate of 2A//s....

    Text Solution

    |

  20. A varying current in a coil change from 10A to 0A in 0.5 sec. If the a...

    Text Solution

    |