Consider an electron (m = 9.1 
confined by electrical forces to move between two rigid walls separated by 1.0 
metre, which is about five atomic diameters. The quantised energy value for the lowest stationary state is
|
(a) 12 |
(b) 6.0 |
(c) 6.0 |
(d) 6 Joule |
(b) 6.0 
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
In the figure, an air lens of radii of curvature 10 cm (
= 10 cm) is cut in a cylinder of glass (μ = 1.5). The focal length and the nature of the lens is
|
(a) 15 cm, concave |
(b) 15 cm, convex |
|
(c) ∞, neither concave nor convex |
(d) 0, concave |
A small bar magnet A oscillates in a horizontal plane with a period T at a place where the angle of dip is 60o. When the same needle is made to oscillate in a vertical plane coinciding with the magnetic meridian, its period will be
(a) 
|
(b) T |
(c) 
|
(d) 2T |
The graph between wave number (
) and angular frequency (w) is
|
(a)
|
(b)
|
(c)
|
(d)
|
An elastic circular wire of length l carries a current I. It is placed in a uniform magnetic field 
(Out of paper) such that its plane is perpendicular to the direction of . The wire will experience
|
(a) No force |
(b) A stretching force |
|
(c) A compressive force |
(d) A torque |
