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Q. Explain Light-emitting diode?
This is a reliable, rugged, and inexpensive semiconductor display device requiring about 10 mA of current flow for full illumination. An LED is shown in Figure. It is available in red, yellow, or green color, in common sizes of T-1 and T-1¾, where the number after the T denotes the diameter of the lamp in units of eighths of an inch. Two-color LEDs are also available.
Q. For the circuit of Figure, determine and sketch i L (t) and vC(t) for inductance values of (a)3/4 H, (b) 2/3 H, and (c) 3/17 H. Note that the inductance values are chosen her
The variable resistor Z o in the circuit shown in Fig. 1 is adjusted until maximum average power is delivered to Zo. a) Find the value of Z o b) Calculate the maximum av
how to ca;lculte star point potential
Determine the resistance and temperature-coefficient: A platinum coil has a resistance of 3.146 Ω at 40 o C and 3.767 Ω at 100 o C. Determine the resistance at 0 o C and the t
how a combination clipper works?
A coil has an inductance of 1.2H and a resistance of 40? and is connected to a 200 V, d.c. supply. Verify the approximate value of the current flowing 60 ms after connecting the co
Why is the signal first attenuated and then amplified?
By a simple time multiplexing of natural samples over a single line, a large radar site transmits 85 analog signals, each with 200-Hz bandwidth. If the sampling is done at twice th
These are small poles fixed to the yoke and spaced in b/w the main poles. They are wound with comparatively few heavy gauge Cu wire turns and are connected in series with the armat
A three-phase, wye-connected, cylindrical-rotor synchronous generator rated at 10 kVA and 230 V has a synchronous reactance of 1.5per phase and an armature resistance of 0.5 pe
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