Home
Class 12
PHYSICS
Across a metallic conductor of non-unifo...

Across a metallic conductor of non-uniform cross section a constant potential difference is applied. The quantity which remains constant along the conductor is :

A

electric current density

B

electric current

C

drift velocity

D

electric field

Text Solution

Verified by Experts

The correct Answer is:
B
electric current
Given conductor is said to be made by connecting different conductors in series as shown and in series connection current always· remains same.
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    KUMAR PRAKASHAN|Exercise SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs ASKED IN AIIMS)|5 Videos

  • CURRENT ELECTRICITY

    KUMAR PRAKASHAN|Exercise SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs ASKED IN BOARD EXAM AND GUJCET)|23 Videos

  • CURRENT ELECTRICITY

    KUMAR PRAKASHAN|Exercise SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs ASKED IN COMPETITIVE EXAMS)|21 Videos

  • BOARD'S QUESTION PAPER MARCH-2020

    KUMAR PRAKASHAN|Exercise PART-B SECTION -C|4 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    KUMAR PRAKASHAN|Exercise Section-D (MCQs asked in GUJCET/Board Exam)|1 Videos

Similar Questions

Explore conceptually related problems

A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor: current, current density, electric field, drift speed?

Answer the following questions: (a) A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor: current, current density electric field, drift speed ? (b) Is Ohm's law universally applicable for all cnducting elements ? If not, give examples of elements which do not obey Ohm's law. (c ) A low voltage suply from which one needs high currents must have very low internal resistance.Why (d) A high tension (HT) supply of say, 6kV must have a very large internal resistance, Why ?

When a potential difference is applied across the ends of a linear metallic conductor

Which quantity remains constant in an adiabatic process ?

Which of following quantities remains constant in transformer ?

Keeping the resistance constant, the potential difference applied across the ends of a component is halved. How does the current change?

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 64 cm and 32 cm from the positive end of the wire in the two cases. the ratio of emf's is

Four wires of the same diameter are connected, in turn, between two points maintained at a constant potential difference, Their resistivities and lengths are, rho and L ("wire 1") 1.2rho and 1.2L("wire 2"), 0.9 rho and 0.9L("wire 3") and rho and 1.5L ("wire 4") . Rank the wires according to hte rates at which energy is dissipated as heat, greatest first,

If the potential difference across the ends of a conductor is doubled, the energy loss becomes-

Name a device that helps to maintain a potential difference across a conductor.

KUMAR PRAKASHAN-CURRENT ELECTRICITY-SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs ASKED IN CBSE-PMT, AIPMT, NEET)
  1. A potentiometer wire has length 4 m and resistance 8Omega. The resista...

    Text Solution

    |

  2. A, B and C arc voltmeters of resistance R, 1.5R and 3R respectively as...

    Text Solution

    |

  3. Across a metallic conductor of non-uniform cross section a constant po...

    Text Solution

    |

  4. A potentiometer wire of length L and a resistance r are connected in s...

    Text Solution

    |

  5. Two metal wires of identical dimensions are connected in series. If si...

    Text Solution

    |

  6. A potentiometer wire is 100 cm long and a constant potential differenc...

    Text Solution

    |

  7. Electric charge passing through a resistor changes with time t as Q = ...

    Text Solution

    |

  8. The potential difference (V(A) - V(B)) between the points A and B in t...

    Text Solution

    |

  9. A filament bulb (500W, 100V) is to he used in a 230 V main supply. Whe...

    Text Solution

    |

  10. In the electrical circuit shown in the figure, the current i through t...

    Text Solution

    |

  11. A cell of emf E and internal resistance r is connected across an exter...

    Text Solution

    |

  12. A carbon resistor of (47 pm 4.7) k Omega is to be marked with rings o...

    Text Solution

    |

  13. A set of 'n' equal resistors, of value 'R' each, are connected in seri...

    Text Solution

    |

  14. A battery consist of a variable number 'n' of identical cells (having ...

    Text Solution

    |

  15. Which of the following acts as a circuit protection device ?

    Text Solution

    |

  16. Six similar bulbs are connected as shown in the figure with a DC sourc...

    Text Solution

    |

  17. In the circuits shown below, the readings or the voltmeters and the am...

    Text Solution

    |