1.

    Consider a conductor with a non-uniform cross-sectional area. If a steady current flows through it, which of the following quantities remains constant along the length of the conductor?

    A

    Drift velocity

    B

    Current density

    C

    Electric field

    D

    Current

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Hard
    ⚡ Time Required :1.5 mins
    🔄Ncert Concepts :Electric Current, Drift Velocity, Current Density

    Related Questions

    1.

    The relation between Faraday’s constant FF, electron charge ee and avogadro number NN is

    A

    F=N/eF = N/e

    B

    F=NeF = Ne

    C

    N=F2N = {F^2}

    D

    F=N2eF = {N^2}e

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Faraday's constant, electron charge, Avogadro's number

    2.

    The current flowing in a copper voltmeter is 1.6  A{\rm{1}}{\rm{.6}}\,\,{\rm{A}}. The number of Cu++C{u^{ + + }} ions deposited at the cathode per minute are

    A

    1.5  imes  10201.5\,\, imes \,\,{10^{20}}

    B

    3  imes  10203\,\, imes \,\,{10^{20}}

    C

    6  imes  10206\,\, imes \,\,{10^{20}}

    D

    1  imes  10191\,\, imes \,\,{10^{19}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Electrolysis, Faraday's laws, Electric charge, Molar mass, Avogadro's number

    3.

    The density of copper is 9  imes  103  kg/m39\,\, imes \,\,{10^3}\,\,{\rm{kg}}/{{\rm{m}}^3} and its atomic mass is 63.5  u{\rm{63}}{\rm{.5}}\,\,{\rm{u}}. Each copper atom provides one free electron. Estimate the number of free electrons per cubic metre in copper.

    A

    1019{10^{19}}

    B

    1023{10^{23}}

    C

    1025{10^{25}}

    D

    1029{10^{29}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :density, atomic mass, Avogadro's number, mole concept

    4.

    Current is flowing with a current density J=480  A cm−2J = 480\,\,{\rm{A}}\,{\rm{c}}{{\rm{m}}^{ - 2}} in a copper wire. Assuming that each copper atom contributes one free electron and given that Avogadro number =6.0  imes  1023  atoms  mol−1 = 6.0\,\, imes \,\,{10^{23}}\,\,{\rm{atoms}}\,\,{\rm{mo}}{{\rm{l}}^{ - 1}}

    Density of copper=  9.0 g  cm−3 = \,\,9.0\,{\rm{g}}\,\,{\rm{c}}{{\rm{m}}^{ - 3}}

    Atomic weight of copper = 64 g  mol−1{\rm{ = }}\,{\rm{64}}\,{\rm{g}}\,\,{\rm{mo}}{{\rm{l}}^{ - 1}}

    The drift velocity of electrons is

    A

    1  mm  s−11\,\,{\rm{mm}}\,\,{{\rm{s}}^{ - 1}}

    B

    2  mm  s−12\,\,{\rm{mm}}\,\,{{\rm{s}}^{ - 1}}

    C

    0.5  mm  s−10.5\,\,{\rm{mm}}\,\,{{\rm{s}}^{ - 1}}

    D

    0.36  mm  s−10.36\,\,{\rm{mm}}\,\,{{\rm{s}}^{ - 1}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :current density, drift velocity, number density, Avogadro's number

    5.

    The current flowing in a copper voltmeter is 3.2  A3.2\,\,A. The number of copper ions (Cu2+)\left( {C{u^{2 + }}} \right) deposited at the cathode per minute is

    A

    0.5  imes  10200.5\,\, imes \,\,{10^{20}}

    B

    1.5  imes  10201.5\,\, imes \,\,{10^{20}}

    C

    3  imes  10203\,\, imes \,\,{10^{20}}

    D

    6  imes  10206\,\, imes \,\,{10^{20}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Electrolysis, Faraday's Laws, Charge, Molar Mass, Avogadro's Number

    6.

    The current flowing in a copper voltmeter is 3.2  A3.2\,\,A. The number of copper ions (Cu2+)\left( {C{u^{2 + }}} \right) deposited at the cathode per minute is

    A

    0.5  imes  10200.5\,\, imes \,\,{10^{20}}

    B

    1.5  imes  10201.5\,\, imes \,\,{10^{20}}

    C

    3  imes  10203\,\, imes \,\,{10^{20}}

    D

    6  imes  10206\,\, imes \,\,{10^{20}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Electrolysis, Faraday's Laws, Charge, Avogadro's number

    7.

    The current flowing in a copper voltmeter is 1.6  A{\rm{1}}{\rm{.6}}\,\,{\rm{A}}. The number of Cu++C{u^{ + + }} ions deposited at the cathode per minute are

    A

    1.5  imes  10201.5\,\, imes \,\,{10^{20}}

    B

    3  imes  10203\,\, imes \,\,{10^{20}}

    C

    6  imes  10206\,\, imes \,\,{10^{20}}

    D

    1  imes  10191\,\, imes \,\,{10^{19}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Electrolysis, Faraday's Laws, Charge, Moles, Avogadro's number

    8.

    Assume that each atom of copper contributes one free electron. What is the average drift velocity of conduction electrons in a copper wire of cross-sectional area 10−7  m2{10^{ - 7}}\,\,{{\rm{m}}^2}, carrying a current of 1.5 A{\rm{1}}{\rm{.5}}\,{\rm{ A}} ? (Given density of copper 9  imes  10−3  kgm−39\,\, imes \,\,{10^{ - 3}}\,\,{\rm{kg}}{{\rm{m}}^{ - 3}}; atomic mass of copper = 63.5{\rm{ = }}\,{\rm{63}}{\rm{.5}}; Avogadro’s number =6.023  imes  1023 = 6.023\,\, imes \,\,{10^{23}} per gram atom)

    A

    1.1  imes  10−2  ms−11.1\,\, imes \,\,{10^{ - 2}}\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    B

    1.1  imes  10−3  ms−11.1\,\, imes \,\,{10^{ - 3}}\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    C

    2.2  imes  10−2  ms−12.2\,\, imes \,\,{10^{ - 2}}\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    D

    2.2  imes  10−3  ms−12.2\,\, imes \,\,{10^{ - 3}}\,\,{\rm{m}}{{\rm{s}}^{ - 1}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Drift velocity, Current, Number density, Atomic mass, Avogadro's number

    9.

    Every atom makes one free electron in copper. If 1.1 A{\rm{1}}{\rm{.1 }}\,{\rm{A}} Current is flowing in the wire of copper having 1mm{\rm{1 mm}} diameter, then the drift velocity(approx.) will be (density of copper = 9  imes  103  k gm−39\,\, imes \,\,{10^3}\,\,{\rm{k}}\,{\rm{g}}{{\rm{m}}^{ - 3}} and atomic weight of copper =63{\rm{63}})

    A

    0.1  mms−10.1\,\,{\rm{mm}}{{\rm{s}}^{ - 1}}

    B

    0.2  mms−10.2\,\,{\rm{mm}}{{\rm{s}}^{ - 1}}

    C

    0.3  mms−10.3\,\,{\rm{mm}}{{\rm{s}}^{ - 1}}

    D

    0.2  mms−10.2\,\,{\rm{mm}}{{\rm{s}}^{ - 1}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Current, Drift velocity, Density, Atomic weight, Avogadro's number

    10.

    The relation between Faraday’s constant FF, electron charge ee and avogadro number NN is

    A

    F=N/eF = N/e

    B

    F=NeF = Ne

    C

    N=F2N = {F^2}

    D

    F=N2eF = {N^2}e

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Current Electricity
    🎯Topic:Electric Current And Drift Velocity
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Faraday's constant, electron charge, Avogadro's number

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