A thermo couple develops 200μV between 0℃ and 100℃. If it develops 64μV and 76μV respectively between (0℃ - 32℃) and (32℃ - 70℃) then what will be the thermo emf it develops between 70℃ and 100℃
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(a) 65 μV |
(b) 60 μV |
(c) 55 μV |
(d) 50 μV |
(b) 60 μV
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The range of wavelength of the visible light is
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(a) 10 Å to 100 Å |
(b) 4,000 Å to 8,000 Å |
(c) 8,000 Å to 10,000 Å |
(d) 10,000 Å to 15,000 Å |
As compared 12C atom, 14C atom has
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(a) Two extra protons and two extra electrons |
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(b) Two extra protons but no extra electrons |
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(c) Two extra neutrons and no extra electrons |
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(d) Two extra neutrons and two extra electrons |
It is easier to start a car engine on a hot day than on a cold day. This is because the internal resistance of the car battery
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(a) Decreases with rise in temperature |
|
(b) Increases with rise in temperature |
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(c) Decreases with a fall in temperature |
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(d) Does not change with a change in temperature |
Radioactive nuclei that are injected into a patient collect at certain sites within its body, undergoing radioactive decay and emitting electromagnetic radiation. These radiations can then be recorded by a detector. This procedure provides an important diagnostic tool called
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(a) Gamma camera |
(b) CAT scan |
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(c) Radiotracer technique |
(d) Gamma ray spectroscopy |
The equivalent resistance between points A and B of an infinite network of resistances each of 1Ω connected as shown, is
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(a) Infinite |
(b) 2 Ω |
(c) |
(d) Zero |
The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the
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(a) Variation of scattering mechanism with temperature |
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(b) Crystal structure |
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(c) Variation of the number of charge carriers with temperature |
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(d) Type of bon |
Which of the following is incorrect statement regarding photon
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(a) Photon exerts no pressure |
(b) Photon energy is hv |
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(c) Photon rest mass is zero |
(d) None of these |
