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Q. Consider a pair of coupled coils as shown in Figure of the text, with currents, voltages, and polarity dots as indicated. Show that the mutual inductance is L12 = L21 = M by following these steps:
(a) Starting at time t0 with i1(t0) = i2(t0) = 0, maintain i2 = 0 and increase i1 until, at time t1, i1(t1) = I1 and i2(t1) = 0. Determine the energy accumulated during this time. Now maintaining i1 = I1, increase i2 until at time t2, i2(t2) = I2. Find the corresponding energy accumulated and the total energy stored at time t2.
(b) Repeat the process in the reverse order, allowing the currents to reach their ?nal values. Compare the expressions obtained for the total energy stored and obtain the desired result.
Q. Explain a common emitter configuration without a feedback. A simple common emitter transistor amplifier--having no negative feedback--is not an ideal amplifier. This is beca
Q. External Frequency Compensation of operational amplifier? For applications requiring a more extended high-frequency response, there are op amps with no internal compensation
Compute the Fourier Transform of the following function: f(x) = exp( - x 2 /(2σ 2 )) cos (2πx/k) where σ and k are constants. What is the minimum sampling rate required
design a 32:1 multiplexer using two 16:1 multiplexer
To demonstrate a practical method of testing semiconductor diodes.
Q. explain the architecture of SS7 and compare with seven-layer OSI architecture. Ans: A block schematic diagram of CCITT no. 7 signalling system is displayed in figure. Sig
Q. A 10-hp, 230-V dc shunt motor takes a full- load line current of 40 A. The armature and field resistances are 0.25 and 230 , respectively. The total brush-contact drop is 2 V,
(a) "Pulse Code Modulation (PCM), as used in telephony, samples a signal at 8 kHz using 256 quantization levels". i. Outline how this scheme works with the help of sketches and,
Explain the Architecture of 8085. Ø ALU Ø Interrupt control Ø Serial I/O control Ø Timing and control unit Ø Instruction Register & Decoding
Q. Show Transformer equivalent circuits? Transformers come in various sizes, from very small, weighing only a few ounces, to very large, weighing hundreds of tons. The ratings
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