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The electrons in this shell are the ones that form bonds with neighboring atoms. Such bonds are called covalent bonds. Most conductors have just one electron in the valence shell. Semiconductors, on the other hand, typically have four electrons in their valence shell.

Voltage regulation needs both load and line regulation

Gate current is Zero in MOS transistor always because gate terminal is isolated from substrate of mos transistor by an dielectric medium SiO2 . … In simple words MOSFET is formed by MOS CAPACITOR which is always in equilibrium under all condition .so no gate current can pass through it.

The transistor works as a closed switch in the saturation area and as an open switch in the cutoff zone.
Digital circuits operate 0 or 1 in binary form. So saturation and cut off regions can operate the circuit.
In the saturation zone (closed switch), output ?1? is produced, whereas in the cut off zone (open switch), output ?0? is produced.

Unity gain amplifier has 100% feedback from output to inverting input terminal of op-amp thus making output to follow input.

Since bcd is the values ranging from 0-9 their equivalent binary can hold 4 bits. Hence we can store 4 bits.

A brushless DC motor (BLDC) is a permanent magnet synchronous electric motor which is driven by direct current (DC) electricity and it accomplishes electronically controlled commutation system

Continues run at the same speed as motor

Surface tension is caused by a force of cohesion at the free surface.
The cohesive forces between molecules in a liquid are shared with all neighboring molecules.
Those on the surface have no neighboring molecules above and, thus, exhibit stronger attractive forces upon their nearest neighbors on and below the surface.

The flow rate is directly proportional to the amount the disc travels. Linear flow characteristics produce equal change in flow per unit of valve stroke. If the disc is open 50%, the flow rate is at 50% of maximum flow.

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