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Latest BPSC AE Electrical Exam Question (Objective Questions), MCQ in English

Subjects : Electrical Engineering

Question Bank BPSC Assistant Engineer Exam (Electrical) Paper 5 - English
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Electrical Engineering

Question 1Single Answer
What is the primary purpose of Kirchhoff's Current Law (KCL)?
  1. A
    To ensure conservation of charge at a node
  2. B
    To calculate voltage drops
  3. C
    To determine power dissipation
  4. D
    To analyze resonance
Question 2Single Answer
In a circuit with three resistors in series, each of 5 Ω, what is the equivalent resistance?
  1. A
    5 Ω
  2. B
    15 Ω
  3. C
    67 Ω
  4. D
    10 Ω
Question 3Single Answer
What is the voltage across a 10 Ω resistor carrying a current of 2 A?
  1. A
    5 V
  2. B
    10 V
  3. C
    20 V
  4. D
    40 V
Question 4Single Answer
Which analysis technique uses loop currents as variables to solve a circuit?
  1. A
    Nodal analysis
  2. B
    Mesh analysis
  3. C
    Superposition theorem
  4. D
    Thevenin’s theorem
Question 5Single Answer
The Superposition theorem is applicable to:
  1. A
    Non-linear circuits
  2. B
    Linear bilateral circuits
  3. C
    Unilateral circuits
  4. D
    Time-varying circuits
Question 6Single Answer
Thevenin’s theorem converts a complex circuit into:
  1. A
    A single current source and parallel resistance
  2. B
    A single resistor
  3. C
    A single voltage source and series resistance
  4. D
    A single capacitor
Question 7Single Answer
For maximum power transfer, the load resistance should be:
  1. A
    Half of the source resistance
  2. B
    Equal to the source resistance
  3. C
    Twice the source resistance
  4. D
    Zero
Question 8Single Answer
Norton’s theorem is the dual of:
  1. A
    Thevenin’s theorem
  2. B
    Superposition theorem
  3. C
    Millman’s theorem
  4. D
    Reciprocity theorem
Question 9Single Answer
Millman’s theorem is used to find:
  1. A
    Equivalent resistance
  2. B
    Current through a resistor
  3. C
    Voltage across parallel branches
  4. D
    Power dissipation
Question 10Single Answer
Tellegen’s theorem is based on:
  1. A
    Conservation of energy
  2. B
    Conservation of charge
  3. C
    Maximum power transfer
  4. D
    Resonance
Question 11Single Answer
In graph theory, a tree of a network graph contains:
  1. A
    All nodes and some branches
  2. B
    All branches and some nodes
  3. C
    Only loops
  4. D
    Only capacitors
Question 12Single Answer
The rank of an incidence matrix for a graph with n nodes is:
  1. A
    n
  2. B
    n - 1
  3. C
    n + 1
  4. D
    2n
Question 13Single Answer
A cut-set in a network graph includes:
  1. A
    All branches of the graph
  2. B
    Only resistors
  3. C
    Branches that disconnect the graph when removed
  4. D
    Only loops
Question 14Single Answer
The tie-set matrix is associated with:
  1. A
    Nodes
  2. B
    Loops
  3. C
    Cut-sets
  4. D
    Resistors
Question 15Single Answer
The number of fundamental loops in a graph with b branches, n nodes, and t twigs is:
  1. A
    b - n + 1
  2. B
    n - 1
  3. C
    b - t
  4. D
    t - n
Question 16Single Answer
The coefficient of coupling (k) in a coupled circuit is always:
  1. A
    Greater than 1
  2. B
    Equal to 0
  3. C
    Less than or equal to 1
  4. D
    Negative
Question 17Single Answer
In the dot convention, if current enters the dotted end of one coil, the induced voltage in the other coil is:
  1. A
    Positive at the dotted end
  2. B
    Negative at the dotted end
  3. C
    Zero
  4. D
    Infinite
Question 18Single Answer
Mutual inductance (M) between two coils depends on:
  1. A
    Resistance of the coils
  2. B
    Physical orientation and number of turns
  3. C
    Capacitance of the circuit
  4. D
    Frequency of the source
Question 19Single Answer
For two coupled coils with L1 = 4 H, L2 = 9 H, and M = 6 H, the coefficient of coupling is:
  1. A
    5
  2. B
    0
  3. C
    67
  4. D
    0
Question 20Single Answer
A transformer is an example of:
  1. A
    A resistive circuit
  2. B
    A coupled circuit
  3. C
    A capacitive circuit
  4. D
    A unilateral circuit
Question 21Single Answer
In a series RLC circuit, resonance occurs when:
  1. A
    XL = XC
  2. B
    R = XL
  3. C
    XC = R
  4. D
    XL = 0
Question 22Single Answer
The quality factor (Q) of a series RLC circuit is given by:
  1. A
    R / (Lω)
  2. B
    ωL / R
  3. C
    R / C
  4. D
    C / L
Question 23Single Answer
At resonance, the power factor of a series RLC circuit is:
  1. A
    Zero
  2. B
    Unity
  3. C
    5
  4. D
    Infinite
Question 24Single Answer
The bandwidth of a series RLC circuit is:
  1. A
    ω0 / Q
  2. B
    Q / ω0
  3. C
    R / L
  4. D
    L / R
Question 25Single Answer
In a parallel RLC circuit, resonance occurs when:
  1. A
    Admittance is minimum
  2. B
    Impedance is minimum
  3. C
    Current is maximum
  4. D
    Voltage is minimum
Question 26Single Answer
The resonant frequency of an RLC circuit is given by:
  1. A
    1 / (2π√(LC))
  2. B
    2π√(LC)
  3. C
    √(LC) / 2π
  4. D
    1 / (π√(LC))
Question 27Single Answer
A series RLC circuit has R = 10 Ω, L = 1 H, and C = 100 µF. The resonant frequency is:
  1. A
    50 Hz
  2. B
    159 Hz
  3. C
    100 Hz
  4. D
    200 Hz
Question 28Single Answer
The selectivity of a resonant circuit depends on:
  1. A
    Resistance only
  2. B
    Capacitance only
  3. C
    Quality factor
  4. D
    Inductance only
Question 29Single Answer
The equivalent resistance of two resistors, 6 Ω and 3 Ω, in parallel is:
  1. A
    9 Ω
  2. B
    2 Ω
  3. C
    18 Ω
  4. D
    4 Ω
Question 30Single Answer
In nodal analysis, the reference node is typically assigned a voltage of:
  1. A
    0 V
  2. B
    1 V
  3. C
    Infinity
  4. D
    -1 V
Question 31Single Answer
The Reciprocity theorem applies to networks that are:
  1. A
    Non-linear
  2. B
    Bilateral
  3. C
    Unilateral
  4. D
    Time-varying
Question 32Single Answer
The number of twigs in a tree of a graph with 5 nodes and 7 branches is:
  1. A
    4
  2. B
    3
  3. C
    5
  4. D
    7
Question 33Single Answer
In a coupled circuit with M = 0, the coils are:
  1. A
    Tightly coupled
  2. B
    Loosely coupled
  3. C
    Not coupled
  4. D
    Inversely coupled
Question 34Single Answer
The power dissipated in a resistor is given by:
  1. A
    V2/R
  2. B
    I2R
  3. C
    VI
  4. D
    All of the above
Question 35Single Answer
The bandwidth of a parallel RLC circuit is proportional to:
  1. A
    RAW
  2. B
    1/R
  3. C
    LAO
  4. D
    CAQ
Question 36Single Answer
The dot convention in coupled circuits indicates:
  1. A
    Resistance polarity
  2. B
    Voltage polarity of mutual inductance
  3. C
    Capacitance value
  4. D
    Current direction only
Question 37Single Answer
In a series RLC circuit, the current at resonance is:
  1. A
    Zero
  2. B
    Maximum
  3. C
    Minimum
  4. D
    Infinite
Question 38Single Answer
A graph with 6 nodes and 8 branches has how many fundamental cut-sets?
  1. A
    5
  2. B
    6
  3. C
    8
  4. D
    3
Question 39Single Answer
The maximum power delivered to a load in a circuit with Vth = 10 V and Rth = 5 Ω is:
  1. A
    5 W
  2. B
    10 W
  3. C
    5 W
  4. D
    25 W
Question 40Single Answer
The impedance of a series RLC circuit at resonance is:
  1. A
    Zero
  2. B
    Infinite
  3. C
    Equal to R
  4. D
    Equal to XL
Question 41Single Answer
What is the time constant of an RL circuit with R = 10 and L = 2 H?
  1. A
    2 s
  2. B
    5 s
  3. C
    20 s
  4. D
    2 s
Question 42Single Answer
In an RC circuit, what does the time constant represent?
  1. A
    Time to fully charge the capacitor
  2. B
    Time for voltage to decay to 37% of its initial value
  3. C
    Time to reach steady-state current
  4. D
    Time for current to double
Question 43Single Answer
What type of damping occurs in an RLC circuit when the roots of the characteristic equation are real and equal?
  1. A
    Overdamped
  2. B
    Underdamped
  3. C
    Critically damped
  4. D
    No damping
Question 44Single Answer
What type of damping occurs in an RLC circuit when the roots of the characteristic equation are real and equal?
  1. A
    Overdamped
  2. B
    Underdamped
  3. C
    Critically damped
  4. D
    No damping
Question 45Single Answer
In a series RLC circuit, what condition leads to overdamped response?
  1. A
    R² < 4L/C
  2. B
    R² = 4L/C
  3. C
    R² > 4L/C
  4. D
    R = L/C
Question 46Single Answer
What is the natural response of a second-order RLC circuit determined by?
  1. A
    External source
  2. B
    Initial conditions and circuit parameters
  3. C
    Steady-state voltage
  4. D
    Power factor
Question 47Single Answer
In an underdamped RLC circuit, what is the nature of the response?
  1. A
    Exponential decay
  2. B
    Oscillatory decay
  3. C
    Constant amplitude oscillation
  4. D
    Linear decay
Question 48Single Answer
What is the time constant of an RC circuit with R = 5 k and C = 2 µF?
  1. A
    10 ms
  2. B
    5 ms
  3. C
    01 s
  4. D
    1 s
Question 49Single Answer
What is the forced response of a circuit due to?
  1. A
    Initial conditions
  2. B
    External input source
  3. C
    Natural frequency
  4. D
    Damping factor
Question 50Single Answer
What is the impedance of a resistor R in an AC circuit?
  1. A
    R
  2. B
    jR
  3. C
    1/R
  4. D
    j/R
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