A proton accelerated by a potential difference 500 KV moves though a transverse magnetic field of 0.51T as shown in figure. The angle θ through which the proton deviates from the initial direction of its motion is
|
(a) 15° |
(b) 30° |
(c) 45° |
(d) 60° |
(b) 30°
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Field inside a solenoid is
|
(a) Directly proportional to its length |
|
(b) Directly proportional to current |
|
(c) Inversely proportional to total number of turns |
|
(d) Inversely proportional to current |
Faraday's laws of electrolysis are related to
|
(a) The atomic number of positive ion |
(b) The equivalent weight of electrolyte |
|
(c) The atomic number of negative ion |
(d) The velocity of positive ion |
A uniform magnetic field B is acting from south to north and is of magnitude 1.5 
. If a proton having mass = 1.7 
and charge = 1.6 
moves in this field vertically downwards with energy 5 MeV, then the force acting on it will be
|
(a) 7.4 |
(b) 7.4 |
(c) 7.4 |
(d) 7.4 |
Which of the following statements concerning the depletion zone of an unbiased PN junction is (are) true
|
(a) The width of the zone is independent of the densities of the dopants (impurities) |
|
(b) The width of the zone is dependent on the densities of the dopants |
|
(c) The electric field in the zone is produced by the ionized dopant atoms |
|
(d) b, c |
If identical charges (-q) are placed at each corner of a cube of side b, then electric potential energy of charge (+q) which is placed at centre of the cube will be
|
(a) |
(b) |
(c) |
(d) |
To charges 
and 
are placed 30 cm apart, shown in the figure. A third charge 
is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is 
, where k is
|
(a) 8
|
(b) 
|
(c) 
|
(d) 
|
