Given the electrical circuit of the image: The value of the current passing through L2 is equal to zero (0). Answer the following questions: – 1. Is it possible to find an equivalent Thevenin resistance for L1? If so, list the steps to find it. – 2. Explain step by step, how would you find the value of the voltage v2, if we do not know the value of the current that passes through L1? – 3. What is the value of voltage v2, if the current passing through L1 is i(t) = 0.5 sin (60t – 90°)?

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Types of Thyristors

With four layers of alternating P- and N- materials, a thyristor is a solid-state semiconductor device. It acts as a type of bi-stable switch and it conducts when the gate receives a current trigger and continues to conduct until the voltage is reverse biased across the device or by some means until the voltage is removed. The silicon-controlled rectifier is considered synonymous with thyristors by some sources. Thyristors are defined as more complex by other sources as it contains at least four-layer of alternating N-type and P-type substrate. They find large applications in the control of electrical power supplies, electric motor speed control, and ranging of light dimmers because thyristors can control large amounts of power supplies and voltage with a small device. The circuit symbol of the thyristor is given below.