In a two slit experiment with monochromatic light fringes are obtained on a screen placed at some distance from the sits. If the screen is moved by 5 
towards the slits, the change in fringe width is 3 
. If separation between the slits is 
, the wavelength of light used is
|
(a) 6000 Å |
(b) 5000 Å |
(c) 3000 Å |
(d) 4500 Å |
(a) 6000 Å
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An object is placed at a distance u from a simple microscope of focal length f. The angular magnification obtained depends:
An alternating voltage of 141.4V (rms) is applied to a vacuum diode as shown in the figure. The maximum potential difference across the condenser will be
|
(a) 100 V |
(b) 200 V |
(c) 100 |
(d) 200 |
The Avogadro's number is 6 
per gm mole and electronic charge is 1.6 
. The Faraday's number is
|
(a) |
(b) |
|
(c) |
(d) |
The process of superimposing signal frequency (i.e. audio wave) on the carrier wave is known as
|
(a) Transmission |
(b) Reception |
(c) Modulation |
(d) Detection |
