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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.
V- I Characteristics When the peak value of applied voltage is less than the break over voltage of triac and no signal is applied to the triac it will block both pos
Ask question #Minimum mechanism of microwave communication 100 words accepted#
Q. An FM station's modulator has a sensitivity k FM = 5π × 10 4 rad/s·V. A receiver uses a discriminator that has a gain constant of 10 -5 /π V·s/rad. Neglecting noise, determin
Q. Explain workinf of colpitts oscillator? When the collector supply voltage V cc is switched on, the capacitors C1 and Cz are charged. These capacitors C1 and Cz discharge thr
Need for Modulation Recognition There are so many communication signals all available with different types of modulation and different frequencies. It is necessary to identify
Use basic circuit theory to convert the "T" circuit below into the equivalent "π". Hint: Remember to disconnect the voltage source and the load.
Convert number systems from one base to another, and apply the binary number system to logic circuits 1. Convert the following decimal numbers to binary a. 81 10 b.
What are the causes of sparking in the commutator? Explain the methods to reduce the sparking in the commutator?
Q. What is thermal runaway. The problem of self heating arises due to dissipation of power at the collector junction. The leakage current ICBO is extremely temperature dependen
Q. What do you mean by Companding? In order to lower the crest factor of a waveform, so as to produce better performance, a process known as companding is used. It works like a
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