The magnetic susceptibility is negative for
|
(a) Paramagnetic materials |
|
(b) Diamagnetic materials |
|
(c) Ferromagnetic materials |
|
(d) Paramagnetic and ferromagnetic materials |
(b) Diamagnetic materials
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The brightness of a bulb will be reduced, if a resistance is connected in
|
(a) Series with it |
(b) Parallel with it |
|
(c) Series or parallel with it |
(d) Brightness of the bulb cannot be reduced |
A particular emission line, detected in the light from a galaxy, has a wavelength 
, where 
is the proper wavelength of the line. The galaxy distance from us
|
(a) 1.6 |
(b) 0.97 |
(c) 2.4 |
(d) 1.62 |
Magnetic lines of force
| (a) Always intersect |
| (b) Are always closed |
|
(c) Tend to crowd far away from the poles of magnet |
| (d) Do not pass through vacuum |
A ray of light falls on the surface of a spherical glass paper weight making an angle α with the normal and is refracted in the medium at an angle β. The angle of deviation of the emergent ray from the direction of the incident ray
|
(a) (α - β) |
(b) 2(α- β) |
(c) (α – β)/2 |
(d) (β - α) |
A manufacturer uses a concave lens instead of a convex lens in a magnifying glass by mistake. What will be the effect on the working of the lens?
