What is a switching impulse?
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Description : What is impulse voltage of transformer?

Description : What is the impulse response of the system?

Description : What is mean by power switching devices?

Answer : Power switching devices means like BJT, power MOSFET, SCR, TRIAC, GTO etc.

Description : Explain the concept of initial and final conditions in switching for L and C.

Answer : i) Inductor: The current through an inductor cannot change instantly. If the inductor current is zero just before switching, then whatever may be the applied voltage, just after switching the inductor ... open-circuit.  The initial and final conditions are summarized in following table:

Description : Switching of a lamp in house produces noise in the radio. This is because switching operation produces?

Answer : Switching of a lamp in house produces noise in the radio. This is because switching operation produces arcs across separating contacts.