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Q. Explain Working of Liquid-crystal display?
This display needs only microwatts of power (over a thousand times less than a LED) and is used in such devices as electronic wristwatches.With the application of an electric field the molecules of the liquid-crystal material are straightened out, absorbing the light, and the display appears black. With no electric field applied, the display appears as a silver mirror because the light is reflected.
A transistor has (A) One p-n junction. (B) Two p-n junction. (C) Four p-n junction. (D) Five p-n junction. Ans: A transistor has two p-n junctions.
N-type semiconductor is an example of (A) Extrinsic semiconductor. (B) Intrinsic semiconductor. (C) Super conductor. (D) Insulators.
Metal Oxide Field Effect Transistor The metal-oxide-semiconductor field-effect transistor (MOSFET/MOS-FET/MOS FET) is a device employed for amplifying or for switching electr
Q. The power gain of an antenna is 10,000. If its input power is 1 kW, calculate the maximum radiation intensity that it can generate.
The armature of a four-pole dcmachine has a simplex lap wound commutator winding (which has the number of parallel paths equal to the number of poles) with 120 two-turn coils. If t
explain about led
A DT LTI system has the following impulse response: h(n)=[cos(pi/+delta(n)] u(n-3)u(n-2) (a) Find the system’s frequency response h(e^jw ). (b) Sketch the magnitude and phase respo
Define branch prediction logic in Pentium. Branch prediction logic in Pentium: The Pentium microprocessor utilizes branch prediction logic to decrease the time required for a
Design a logic circuit with 4 inputs A, B, C & D that will produce output ‘1’ only whenever two adjacent input variables are 1’s. A & D are also to be treated as adjacent, impleme
(a) Illustrate the concept of Part Families ? (b) Explain briefly the general process to solve the problem of grouping the parts into families.
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