The voltage V and current I graph for a conductor at two different temperatures 
and 
are shown in the figure. The relation between and is
|
(a) |
(b) |
(c) |
(d) |
(a) 
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The wavelength of maximum energy, released during an atomic explosion, was 2.93 × 10–10 m. Given that the Wien's constant is 2.93 × 10–3 m K, the maximum temperature attained must be of the order of
|
(a) 10–7 K |
(b) 107 K |
(c) 10–13 K |
(d) 5.86 × 107 K |
In a PN-junction
|
(a) P and N both are at same potential |
|
(b) High potential at N side and low potential at P side |
|
(c) High potential at P side and low potential at N side |
|
(d) Low potential at N side and zero potential at P side |
Choke coil works on the principle of
|
(a) Transient current |
(b) Self induction |
(c) Mutual induction |
(d) Wattless current |
Two rays A and B being reflected by a mirror and going as A' and B'. The mirror:
Biaxial crystal among the following is
|
(a) Calcite |
(b) Quartz |
(c) Selenite |
(d) Tourmaline |
If in the experiment of Wheatstone's bridge, the positions of cells and galvanometer are interchanged, then balance points will
|
(a) Change |
|
(b) Remain unchanged |
|
(c) Depend on the internal resistance of cell and resistance of galvanometer |
|
(d) None of these |
