Explanation:
An electrochemical cell is a device which converts chemical energy to electric energy, and maintains the flow of charge in a circuit. There are 2 types of electrochemical cells – Galvanic cell and Electrolytic cell.
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At ordinary temperatures, the electrical conductivity of semi conductors in mho/meter is in the range
|
(a) |
(b) |
(c) |
(d) |
Frequency of a wave is 6 
. The wave is
|
(a) Radiowave |
(b) Microwave |
(c) X-ray |
(d) None of these |
Two Nicols are oriented with their principal planes making an angle of 60°. The percentage of incident unpolarized light which passes through the system is
|
(a) 50% |
(b) 100% |
(c) 12.5% |
(d) 37.5% |
In a Young's double slit experiment, the slits are 2 mm apart and are illuminated with a mixture of two wavelength 
and λ = 900 nm. The minimum distance from the common central bright fringe on a screen 2m from the slits where a bright fringe from one interference pattern coincides with a bright fringe from the other is
|
(a) 1.5 mm |
(b) 3 mm |
(c) 4.5 mm |
(d) 6 mm |
Solid targets of different elements are bombarded by highly energetic electron beams. The frequency (f) of the characteristic X-rays emitted from different targets varies with atomic number Z as
|
(a) f ∝ |
(b) f ∝ |
(c) f ∝ Z |
(d) f ∝ |
The combination of the gates shown in the figure below produces
|
(a) NOR gate |
(b) OR gate |
(c) AND gate |
(d) XOR gate |
A man is looking at a small object placed at his near point. Without altering the position of his eye or the object, he puts a simple microscope of magnifying power 5X before his eyes. The angular magnification achieved is:
