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Answer briefly on the following Free body diagram A free-body diagram is a sketch of an object of interest with all the surrounding objects stripped away and all of the forces acting on the body shown. The drawing of a free-body diagram is an important step in the solving of mechanics problems since it helps to visualize all the forces acting on a single object. The net external force acting on the object must be obtained in order to apply Newton's Second Law to the motion of the object. Different types of loads Point load This type of load acts relatively on a smaller area. For example, the force exerted by a  chair or a table leg on the supporting floor or load exerted by a beam on a supporting column are both considered to be concentrated.  Distributed load As the name itself implies, a uniformly distributed load is spread over a large area. Its magnitude is designated by its intensity (N/m or kN/m). The water pressure on the bottom slab of a water tank is an example of such loa

1. A wedge is described by z = 0, 30° < ⲫ < 60°. Which of the following is incorrect? (a) The wedge lies in the x - y plane. (b) It is infinitely long. (c) On the wedge, 0 < ρ < ∞ (d) A unit normal to the w edge is ± a z (c) The wedge includes neither the x-axis nor the y-axis. 2. Given fie ld A̅ = 3x 2 yza̅ x  + x 3 za̅ y  + (x 3 y - 2z)a̅ z  it can be sa id th at A̅  is. (a) Harmonic (b) Divergenceless (c) Solenoidal (d) Conservative 3. If ∇̅.D̅ = ∈∇̅.E̅ and ∇̅.J̅ = σ∇̅.E̅  in a given material, the material is said to be (a) Isotropic (b) L inear (c) Homogenous (d) Linear and homogenous. 4. One of these equations is not Maxwell’s equation for a static electromagnetic field in a linear ho mogeneous medium. (a)  ∇̅ 2 A̅ = μ 0 J̅ (b) ∇̅.B̅ = 0 (c) ∇̅xD̅ = 0 (d) ∮B̅.dl̅ = μ 0 I̅ 5. When a sinusoidal voltage is suddenly applied to an electrical circuit which of the following constitutes its response? (a) Steady-state only (b) Forced only (c) Transient only (d) T

Answer the following in brief What are complex frequency and real frequency? Give their applications. A type of frequency that depends on two parameters; one is the σ which controls the magnitude of the signal and the other is “w”, which controls the rotation of the signal; is known as “complex frequency”. s = σ + jw "s" is a generalized frequency variable whose real part a describes growth and decay of the amplitudes of signals, and whose imaginary part jω is the angular frequency in the usual sense. From the pole-zero diagram of a network function, how can you understand whether the network is stable or not? Given a polynomial N(s) = P(s) / Q(s) By factorizing the numerator and denominator polynomials, we can easily show that the polynomial becomes zero when the ‘s’ terms in the numerator polynomial have the values s=0, -z₁,-z₂…….-zₙ, thus the roots of numerator define the zeros. Also, the roots of the denominator polynomial define the poles of the function. Zeros are marke

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Department: Chhattisgarh State Power Distribution Company Limited (CSPHCL) Post: Junior Engineer Number of posts: 307 Eligibility: 03 years Diploma in Electrical / IT / Computer Science / Electronics / Civil or relevant engineering discipline from any Government recognized institute. Last Date: 28/10/2021 Written Test: CBT Download notification Study Material & free samples for Junior Engineer Level Exams

1. A voltage waveform V (t) =12t² is applied across a 1 H inductor for t ≥ 0, with the initial electric current through it is zero. The electric current through inductor for t ≥ 0 is given by (a) 12t (b) 24t (c) 12t² (d) 4t³  2. In the network shown, what is the electric current I in the direction shown (a) 0 A (b) (1/3) A (c) (5/6) A (d) 4 A 3. Which of the following cannot be connected in scries unless they are identical? (a) Voltage source  (b) Current source  (c) Both (d) Resistance 4. A system with transfer function G(s) = [(s² + 9)(s + 2)]/[(s + 1)(s + 3)(s + 4)] is exited by  sinωt. The steady state output of the system is zero at (a) Q = 1 rad/sec . (d) Q = 2 rad/sec (c)  Q  = 3 rad/sec (d) Q = 4 rad/sec 5. F or static magnetic field Maxwell’s curl equation is given by (a) ∇.B̅ = μ 0 .J̅ (b) ∇.B̅ = 0 (c) ∇xB̅ = μ 0 .J̅ (d) ∇xB̅ = μ 0/ J̅ 6. Which of the following laws of electromagnetic theory is associated with force experienced by two loops of a wire carrying currents?

Answer the following in the brief. Define half-power frequencies in resonant RLC series circuit If the series RLC circuit is driven by a variable frequency at a constant voltage, then the magnitude of the current, I is proportional to the impedance, Z, therefore at resonance the power absorbed by the circuit must be at its maximum value as P = I²Z. If we now reduce or increase the frequency until the average power absorbed by the resistor in the series resonance circuit is half that of its maximum value at resonance, we produce two frequency points called the half-power points which are -3dB down from maximum, taking 0dB as the maximum current reference. Th e point corresponding to the lower frequency at half the power is called the “ lower cut-off frequency ”, labelled f L  with the point corresponding to the upper frequency at half power being called the “ upper cut-off frequency ”, labelled f H . The distance between these two points, i.e. ( f H  –  f L  ) is called the Bandwidth ,