Explanation:
Components and wires are coded with colors to identify their value and function. The colors brown, red, green, blue, and violet are used as tolerance codes on 5-band resistors only.
So,Resistors are generally colour coded to determine their values in ohm.
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Which one of the following is the weakest kind of bonding in solids
|
(a) Ionic |
(b) Metallic |
(c) Vander Waals |
(d) Covalent |
White light may be considered to be a mixture of waves with l ranging between 3900 Å and 7800 Å. An oil film of thickness 10,000 Å is examined normally by reflected light. If m = 1.4, then the film appears bright for
|
(a) 4308 Å, 5091 Å, 6222 Å |
(b) 4000 Å, 5091 Å, 5600 Å |
|
(c) 4667 Å, 6222 Å, 7000 Å |
(d) 4000 Å, 4667 Å, 5600 Å, 7000Å |
A silicon speciman is made into a P-type semi-conductor by dopping, on an average, one Indium atom per 5 
silicon atoms. If the number density of atoms in the silicon specimen is 5 
then the number of acceptor atoms in silicon per cubic centimetre will be
|
(a) 2.5 |
(b) 1.0 |
|
(c) 1.0 |
(d) 2.5 |
If an electron oscillates at a frequency of 1 GHz it gives
|
(a) X-rays |
(b) Mirowaves |
(c) Infrared rays |
(d) None of these |
