Network Elements and the Concept of Circuit

Network Elements and the Concept of Circuit

Easy Questions

Network Theory

Network Elements and the Concept of Circuit
Network theory miscellaneous
  1. The time constant of the network shown in the fig. is—










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    Time constant τ = R eq C
    R eq = 4R | | 4R = 2R
    C = 2C
    so, τ = 2 R. 2C
    = 4RC


    Correct Option: A

    Time constant τ = R eq C
    R eq = 4R | | 4R = 2R
    C = 2C
    so, τ = 2 R. 2C
    = 4RC


  1. All the resistances in the fig. are 1 Ω each. The value of I will be—










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    In order to calculate I in the given figure draw the equivalent model.

    I =
    V
    Req

    I =
    1
    		 =
    8
    15 / 815


    Correct Option: D

    In order to calculate I in the given figure draw the equivalent model.

    I =
    V
    Req

    I =
    1
    		 =
    8
    15 / 815


  1. Substitution theorem applies to—








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    Substitution theorem is applies to linear time invariant networks.

    Correct Option: C

    Substitution theorem is applies to linear time invariant networks.

  1. The total power consumed in the circuit shown in figure is—










  1. View Hint View Answer Discuss in Forum

    In order to calculate the total power consumed in the circuit. First off all calculate the net current in the circuit element by using superposition theorem.
    Case I. Take 4V source

    i = 4= 1 amp. (A → B → C)
    4

    Case II. Take 2A source here current in each 2 Ω resistance will be 1 amp. (B → A and B → C)
    Net current in branch AB resistance R = 1 – 1 = 0 Net current in branch BC resistance RBC = 1+1 = 2amp.
    Power consumed in branch BC = I2 RBC = 22. 2 = 8 W


    Correct Option: B

    In order to calculate the total power consumed in the circuit. First off all calculate the net current in the circuit element by using superposition theorem.
    Case I. Take 4V source

    i = 4= 1 amp. (A → B → C)
    4

    Case II. Take 2A source here current in each 2 Ω resistance will be 1 amp. (B → A and B → C)
    Net current in branch AB resistance R = 1 – 1 = 0 Net current in branch BC resistance RBC = 1+1 = 2amp.
    Power consumed in branch BC = I2 RBC = 22. 2 = 8 W


  1. The superposition theorem is valid for—








  1. View Hint View Answer Discuss in Forum

    The superposition theorem is valid for all linear networks only.

    Correct Option: A

    The superposition theorem is valid for all linear networks only.