Home
Class 12
PHYSICS
Assertion: An AC can be transmitted over...

Assertion: An AC can be transmitted over long distances without much power loss.
Reason: An AC can be stepped up or down with the help of a transformer.

A

Both (A) and (R) are true and (R) is the correct explanation of (A).

B

Both (A) and (R) are true but (R) is not the correct explanation of (A)

C

is true but (R) is false.

D

(A) is false and (R) is also false

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • SAMPLE PAPER SELF-ASSESSMENT (11)

    EDUCART PUBLICATION|Exercise SECTION -C|1 Videos

  • SAMPLE PAPER SELF-ASSESSMENT (11)

    EDUCART PUBLICATION|Exercise SECTION -C|1 Videos

  • CBSE TERM-1 SAMPLE PAPER 1

    EDUCART PUBLICATION|Exercise SECTION-C|6 Videos

Similar Questions

Explore conceptually related problems

An audio signal of 15 kHz frequency cannot be transmitted over long distance without modulation because.

Assertion : An ideal transformer does not vary the power. Reason : An transformer is used to step-up or step-down ac voltages.

Assertion. Audio signal of frequencuy 10 KHz cannot be transmitted over long distance without modulation. Reason. Length of the antenna required lambda//4 . Should have practical value.

Electric power is transmitted over long distances through conducting wires at high voltage because

How do we control AC without much loss of energy?

Knowledge Check

  • A : AC can be transmitted over long distances at high voltage without much power loss. R : The average value of AC is defined over any half cycle.

    A
    If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
    B
    If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
    C
    If Assertion is true statement but Reason is false, then mark (3)
    D
    If both Assertion and Reason are false statement, then mark (4)

  • An audio signal of 15 kHz frequency cannot be transmitted over long distance without modulation because.

    A
    the size of the required anteena would be at least 5 km which is not convenient.
    B
    the audio signal cannot be transmitted through sky waves.
    C
    the size of the required antenna would be at least 20 km, which is not convenient.
    D
    effective power transmitted would be very low, if the size of the antenna is less than 5 km

  • Assertion : An ideal transformer does not vary the power. Reason : An transformer is used to step-up or step-down ac voltages.

    A
    If both assertion ans reason are true ans reaason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion istrue but reason is false.
    D
    If both assertion and reason are false.
    • EDUCART PUBLICATION- SAMPLE PAPER SELF-ASSESSMENT (11)-SECTION -B
    1. Thermistor is

      Text Solution

      |

    2. Which set-up can be used for verification of Ohm's law?

      Text Solution

      |

    3. Estimate the average drift velocity of conduction electrons in a coppe...

      Text Solution

      |

    4. In the diagram shown, the reading of voltmeter is 20 V and that of a...

      Text Solution

      |

    5. A galvanometer can be converted into an ammeter by connecting

      Text Solution

      |

    6. There is a thin conducting wire carrying current. What is the value of...

      Text Solution

      |

    7. Calculate the force per unit length on a long straight wire carrying c...

      Text Solution

      |

    8. A current carrying conductor of length 44 cm turns into circular loop....

      Text Solution

      |

    9. Magnetic moment of an electron of charge e moving in a circular orbit ...

      Text Solution

      |

    10. A toroid of n turns, mean radius R and cross-sectional radius a carrie...

      Text Solution

      |

    11. A coil having 500 square loops each of side 10 cm is placed normal to ...

      Text Solution

      |

    12. In a step up transformers, 220V is converted into 200V. The number of ...

      Text Solution

      |

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

      Text Solution

      |

    14. A transformer has 200 turns in primary coil and 1000 turns in secondar...

      Text Solution

      |

    15. An AC voltage is applied to a resistance R and an inductance L in seri...

      Text Solution

      |

    16. Power of a Point With respect to Circle when point is inside a circle

      Text Solution

      |

    17. Find the equivalent capacitance between P and Q if C1 = 6 mu F and C= ...

      Text Solution

      |

    18. Assertion : A metallic surface is moved in and out in magnetic field t...

      Text Solution

      |

    19. Assertion (A): Where magnetic flux changes, emf is induced. Reason (R)...

      Text Solution

      |

    20. Assertion: An AC can be transmitted over long distances without much p...

      Text Solution

      |