In an experiment, a graph was plotted of the potential difference V between the terminals of a cell against the circuit current i by varying load rheostat. Internal conductance of the cell is given by
|
(a) xy |
(b) |
(c) |
(d) (x – y) |
(b) 
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A man with defective eyes cannot see distinctly object at the distance more than 60 cm from his eyes. The power of the lens to be used will be
|
(a) + 60 D |
(b) – 60 D |
(c) – 1.66 D |
(d) |
Which of the following is diamagnetism
|
(a) Aluminium |
(b) Quartz |
(c) Nickel |
(d) Bismuth |
In Young's double slit experiment, the slits are 0.5 mm apart and interference pattern is observed on a screen placed at a distance of 1.0 m from the plane containing the slits. If wavelength of the incident light is 6000 Å, then the separation between the third bright fringe and the central maxima is
|
(a) 4.0 mm |
(b) 3.5 mm |
(c) 3.0 mm |
(d) 2.5 mm |
When an electron in hydrogen atom is excited, from its 4th to 5th stationary orbit, the change in angular momentum of electron is (Planck’s constant: h = 6.6 
|
(a) 4.16 |
(b) 3.32 |
|
(c) 1.05 |
(d) 2.08 |
If in nature there may not be an element for which the principal quantum number n > 4, then the total possible number of elements will be
|
(a) 60 |
(b) 32 |
(c) 4 |
(d) 64 |
