MCQ
The constituents of nucleus are:
- AElectrons and protons.
- BProtons and neutrons.
- CNeutrons and electrons.
- DElectrons, protons and neutrons.
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In a thermocouple, the temperature that does not depend on the temperature of the cold junction is called
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(a) Neutral temperature |
(b) Temperature of inversion |
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(c) Both the above |
(d) None of the above |
If two bulbs of wattage 25 and 100 respectively each rated at 220 volt are connected in series with the supply of 440 volt, then which bulbs will fuse
|
(a) 100 watt bulb |
(b) 25 watt bulb |
(c) None of them |
(d) Both of them |
A monochromatic beam of light passes from a denser medium into a rarer medium. As a result
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(a) Its velocity increases |
(b) Its velocity decreases |
|
(c) Its frequency decreases |
(d) Its wavelength decreases |
Two non-ideal identical batteries are connected in parallel. Consider the following statements
(i) The equivalent e.m.f. is smaller than either of the two e.m.f.s
(ii) The equivalent internal resistance is smaller than either of the two internal resistances
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(a) Both (i) and (ii) are correct |
(b) (i) is correct but (ii) is wrong |
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(c) (ii) is correct but (i) is wrong |
(d) Both (i) and (ii) are wrong |
Energy conversion in a photoelectric cell takes place from
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(a) Chemical to electrical |
(b) Magnetic to electrical |
|
(c) Optical to electrical |
(d) Mechanical to electrical |
The shift by which object appears to be raised ....... with the increase in the thickness of the denser medium.
In two separate set - ups of the Young's double slit experiment, fringes of equal width are observed when lights of wavelengths in the ratio 1 : 2 are used. If the ratio of the slit separation in the two cases is 2 : 1, the ratio of the distances between the plane of the slits and the screen in the two set - ups is
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(a) 4 : 1 |
(b) 1 : 1 |
(c) 1 : 4 |
(d) 2 : 1 |