A thermoelectric refrigerator works on
|
(a) Joule effect |
(b) Seeback effect |
(c) Peltier effect |
(d) Thermonic emission |
A thermoelectric refrigerator works on
|
(a) Joule effect |
(b) Seeback effect |
(c) Peltier effect |
(d) Thermonic emission |
(c) Peltier effect
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Ratio of the wavelengths of first line of Lyman series and first line of Balmer series is
|
(a) 1: 3 |
(b) 27 : 5 |
(c) 5 : 27 |
(d) 4 : 9 |
The mass number of He is 4 and that for sulphur is 32. The radius of sulphur nucleus is larger than that of helium, by times
|
(a) |
(b) 4 |
(c) 2 |
(d) 8 |
If yellow light in the Young's double slit experiment is replaced by red light, the fringe width will
|
(a) Decrease |
(b) Remain unaffected |
|
(c) Increase |
(d) First increase and then decrease |
What is the respective number of α and β particles emitted in the following radioactive decay ![]()
|
(a) 6 and 8 |
(b) 8 and 8 |
(c) 6 and 6 |
(d) 8 and 6 |