Explanation:
When ordinary (unpolarised) light is reflected from a surface, it gets partial polarisation, it means some of the electric vectors in some planes are cut-off. When this partially polarized light is incident on polarized glasses, glass acts as an analyser and therefore block out some reflected light.
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For the circuit shown, which of the following statements is true
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(a) With |
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(b) With |
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(c) With |
|
(d) With |
Charges q, 2q, 3q and 4q are placed at the corners A, B, C and D of a square as shown in the following figure. The direction of electric field at the centre of the square is along
|
(a) AB |
(b) CB |
(c) BD |
(d) AC |
Which of the following would you prefer to use while reading small letters found in a dictionary?
Two plane mirrors are inclined at an angle of 72° . The number of images of a point object placed between them will be
|
(a) 2 |
(b) 3 |
(c) 4 |
(d) 5 |
A bulb rated at (100W – 200V) is used on a 100V line. The current in the bulb is
|
(a) |
(b) 4 amp |
(c) |
(d) 2 amp |
The wavelength Ka X-rays produced by an X-ray tube is 0.76 Å. The atomic number of anticathode material is
|
(a) 82 |
(b) 41 |
(c) 20 |
(d) 10 |
Two coils of self inductance 
and 
are placed closer to each other so that total flux in one coil is completely linked with other. If M is mutual inductance between them, then
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(a) |
(b) |
(c) |
(d) |
