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Q. Figure can also be considered as a simple model of a magnetically operated relay that is commonly used for the automatic control and protection of electric equipment. Consider the core and armature (shown as "Bar" in Figure of the relay to be constructed out of infinitely permeable magnetic material. The core has a circular cross section and is 1.25 cm in diameter, while the armature has a rectangular cross section. The armature is so supported that the two air gaps are always equal and of uniform length over their areas. A spring (not shown in the figure), whose force opposes the magnetic pull, restrains the motion of the armature. If the operating coil has 1800 turns carrying a current of 1 A, and the gaps are set at 0.125 cmeach, find the pull that must be exerted by the spring. You may neglect leakage and fringing.
Q. At the two terminals (A, B) of a one-port network, the voltage and the current are given to be v(t) =200 √2 cos (377t + 60°) V and i(t) = 10√2 cos(377t + 30°) A. (a) Determin
Q. The flux-density distribution produced in a two - pole synchronous generator by an acexcited field winding is B(θ, t) = B m sin ω 1 t cos θ Find the nature of the armatur
Its not essential that a power plant uses only two rectifiers, it depends on the load there at the site and the capacity of the rectifier or SMPS. Assume the load at the site is 12
Q. A single-phase industrial plant consists of two loads in parallel: P1 = 48kW PF1 = 0.60 lagging P2 = 24kW PF2 = 0.96 leading It is operated from a 500-V, 60-Hz source.
Thermocouples are used for the measurement of (A) Humidity. (B) Pressure. (C) Temperature. (D) Density.
Wireless and Mobile Communication 1. Explain the architecture of Cellular Networks. 2. Discuss the fundamentals of GSM Network. 3. Explain briefly the different interface
What is the function of mode set register in 8257? The mode set register is used for programming the 8257 as per the needs of the system. The function of the mode set register
Ceramics are good (A) Insulators. (B) Conductors. (C) Superconductors. (D) Semiconductors. Ans: Ceramics are good insulators.
Draw the circuit diagram for the connections to the EPROM and just one RAM device as defined in the memory map in question 3. You must show all the connections required to o
Q. The full-wave rectified waveform, approximated by the first three terms of its Fourier series, is given by v (ωt) = V m sin (ωt/2), for 0 ≤ ωt ≤ 2π, and where V m = 100
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