In X-ray experiment Ka, Kb denotes
|
(a) Characteristic |
(b) Continuous wavelength |
|
(c) a, b-emissions respectively |
(d) None of these |
In X-ray experiment Ka, Kb denotes
|
(a) Characteristic |
(b) Continuous wavelength |
|
(c) a, b-emissions respectively |
(d) None of these |
(a) Characteristic
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When two identical capacitors are in series have 3mF capacitance and when parallel 12mF. What is the capacitance of each
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(a) 6 μF |
(b) 3 μF |
(c) 12 μF |
(d) 9 μF |
A sensitive magnetic instrument can be shielded very effectively from outside magnetic fields by placing it inside a box of
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(a) Teak wood |
(b) Plastic material |
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(c) Soft iron of high permeability |
(d) A metal of high conductivity |
The ratio of the wavelengths for 2 → 1 transition in Li++, He+ and H is
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(a) 1 : 2 : 3 |
(b) 1 : 4 : 9 |
(c) 4 : 9 : 36 |
(d) 3 : 2 : 1 |
In Young’s experiment, monochromatic light is used to illuminate the two slits A and B. Interference fringes are observed on a screen placed in front of the slits. Now if a thin glass plate is placed normally in the path of the beam coming from the slit
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(a) The fringes will disappear |
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(b) The fringe width will increase |
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(c) The fringe width will increase |
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(d) There will be no change in the fringe width but the pattern shifts |