- Afrom -1 to + 1
- Bfrom 0 to 8
- Cfrom zero to + 1
- Dnone of these
Explanation:
Values for the quantum number ml are -1, 0, + 1
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When the current in a coil changes from 8 ampere to 2 ampere in 3
second, the e.m.f. induced in the coil is 2 volt. The self inductance of the coil (in millihenry) is
|
(a) 1 |
(b) 5 |
(c) 20 |
(d) 10 |
The armature of dc motor has 20Ω resistance. It draws current of 1.5 ampere when run by 220 volts dc supply. The value of back e.m.f. induced in it will be
|
(a) 150 V |
(b) 170 V |
(c) 180 V |
(d) 190 V |
The length of the optical path of two media in contact of length and
of refractive indices
and
respectively, is
|
(a) |
(b) |
(c) |
(d) |
The ratio of radii of nuclei
and
is 3 : 5. The number of neutrons in the nuclei of X will be
|
(a) 52 |
(b) 73 |
(c) 125 |
(d) 13 |
Two cells when connected in series are balanced on 8m on a potentiometer. If the cells are connected with polarities of one of the cell is reversed, they balance on 2m. The ratio of e.m.f.'s of the two cells is
|
(a) 3 : 5 |
(b) 5 : 3 |
(c) 3 : 4 |
(d) 4 : 3 |
The critical angle of a medium with respect to air is 45°. The refractive index of medium is
|
(a) 1.41 |
(b) 1.2 |
(c) 1.5 |
(d) 2 |