Home
Class 12
PHYSICS
Assertion : If a current is flowing thro...

Assertion : If a current is flowing through a conducting wire of non-uniform cross-section, drift speed and resistance both will increase at a section where cross-sectional area is less.
Reason : Current density at such sections is more where cross-sectional area is less.

A

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

If both Assertion and Reason are true and Reason is not correct explanation of Assertion.

C

If Assertion is true but Reason is false.

D

If Assertion is false but Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Match the columns|4 Videos

  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Medical entrances gallery|97 Videos

  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Taking it together|142 Videos

  • COMMUNICATION SYSTEM

    DC PANDEY|Exercise Subjective|11 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Medical entrances gallery|25 Videos

Similar Questions

Explore conceptually related problems

A stready current i is flowing through a conductor of uniform cross-section. Any segment of the conductor has

Assertion : Current I is flowing through a cylindrical wire of non-uniform cross-section as shown. Section of wire near A will be more heated compared to the section near B. Reason : Current density near A is more.

A wire of non-uniform cross-section is carrying a steady current. Along the wire

Current is flowing through a wire of non-uniform cross section. Cross section of wire at A is les than the cross section of wire at B. Then match the following

A steady current flows in a metallic conductor of non-uniform cross-section i.e., i : constant. A ne constant.

A current is flowing through a conducting hollow pipe whose area of cross-section is shown in the fig. The value of magnetic induction will be zero at-

A steady current is passing through a linear conductor of non-uniform cross-section. The net quantity of charge crossing any cross-section per second is.

The resistance will be least in a wire with length, cross-section area respectively,

DC PANDEY-CURRENT ELECTRICITY-B. Assertion and reason
  1. Assertion : V = iR is Ohm's law. Reason : V - I graph is always a st...

    Text Solution

    |

  2. Assertion : Current versus potential difference (i-V) graph for a cond...

    Text Solution

    |

  3. Assertion : If a current flows through a wire of non-uniform cross-sec...

    Text Solution

    |

  4. Assertion : In our houses when we start switching on different light b...

    Text Solution

    |

  5. Assertion : If a current is flowing through a conducting wire of non-u...

    Text Solution

    |

  6. Assertion : Kilovol-ampere (kVA) and kilowatt-hour have the same dimen...

    Text Solution

    |

  7. Assertion : If by mistake, a voltmeter is connected in series, then ci...

    Text Solution

    |

  8. Assertion : Resistance of an ammeter is less than the resistance of a ...

    Text Solution

    |

  9. Assertion : A resistance wire is broken into four pices and all are co...

    Text Solution

    |

  10. Assertion : Potential difference across the terminals of a battery is ...

    Text Solution

    |

  11. Assertion : Inside a conductor, electrons have no motion in the absenc...

    Text Solution

    |

  12. Assertion : Current between two points in an electrical always flows f...

    Text Solution

    |

  13. Assertion : In case of potentiometer experiment, if emfs of known and ...

    Text Solution

    |

  14. Assertion : In potentiometer experiment, null point cannot be obtained...

    Text Solution

    |

  15. Assertion : In the circuit shown in figure, battery is ideal. If a res...

    Text Solution

    |

  16. Assertion : Two 60 W bulbs are first connected in series and then in p...

    Text Solution

    |

  17. Assertion : Two resistance wires shown in figure are of same material....

    Text Solution

    |

  18. Assertion : Two identical bulbs when connected across a battery, produ...

    Text Solution

    |