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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 mutualinductance 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 final values. Compare the expressions obtained for the total energy stored and obtain the desired result.
E l e c t r ons and Holes For T> 0 K, there would be some electrons in the otherwise empty conduction band, and some empty states in the otherwise filled valence ban
Q. What are the various tones used in stronger telephony? When called party line is obtained, exchange control equipment transmits out the ringing current to telephone set of t
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HOW TO FIND THE OPERATING POINT OF THE TRANSISTO IN A COLLECTOR TO BASE BIAS CIRCUIT
Consider the RC circuit of Figure (a) with R = 2 ,C = 5F,and i(t) = I = 10 A (a dc current source). Find the expressions for the capacitor voltage vC(t) and the capacitor current
Q. Explain working of Cardiac Pacemaker? When blockage occurs to the biological signals that stimulate the heart to beat, the application of electric pacemaker pulses forcing t
Q. A three-phase, 50-Hz induction motor has a full load speed of 700 r/min and a no-load speed of 740 r/min. (a) How many poles does the machine have? (b) Find the slip and t
Q. Explain why equalizing connection are used in lap winding and dummy coils are some time used in wave winding. Sol. For batteies operating in parallel, the circulating c
Amperes Circuital Law states that the line integral of the magnetic field H around a closed path equals the total current enclosed. ∫ H dl ∑ I App
how does it work explain with figure?
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