Deviation of 5° is observed from a prism whose angle is small and whose refractive index is 1.5. The angle of prism is
|
(a) 7.5° |
(b) 10° |
(c) 5° |
(d) 3.3° |
(b) 10°
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A magnet is suspended in such a way that it oscillates in the horizontal plane. It makes 20 oscillations per minute at a place where dip angle is 30o and 15 oscillations per minute at a place where dip angle is 60o. The ratio of total earth's magnetic field at the two places is
(a) 3
|
(b) 16 : 9
|
(c) 4 : 9 |
(d) 2
|
Which of the following is not reversible
|
(a) Joule effect |
(b) Peltier effect |
(c) Seebeck effect |
(d) Thomson effect |
When 
is bombarded with one neutron, the fission occurs and the products are three neutrons, 
and
(a) 
|
(b) 
|
(c) 
|
(d) 
|
When a 12 Ω resistor is connected with a moving coil galvanometer then its deflection reduces from 50 divisions to 10 divisions. The resistance of the galvanometer is
|
(a) 24 Ω |
(b) 36 Ω |
(c) 48 Ω |
(d) 60 Ω |
The amount of charge required to liberate 9 gm of aluminium (atomic weight = 27 and valency = 3) in the process of electrolysis is (Faraday's number = 96500 coulombs/gm equivalent)
|
(a) 321660 coulombs |
(b) 69500 coulombs |
(c) 289500 coulombs |
(d) 96500 coulombs |
Four metallic plates each with a surface area of one side A are placed at a distance d from each other. The plates are connected as shown in the circuit diagram. Then the capacitance of the system between a and b is
|
(a) |
(b) |
(c) |
(d) |
