Explanation:
The statement has the essence of quantum theory which postulates that both the position and momentum cannot be precisely measured at the same instant. This is called Uncertainty Principle. An associated error always exists in either or both. Hence behavior of complex systems becomes much more difficult to analyse and impossible to predict.
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A person uses spectacles of power +2D. He is suffering from
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(a) Short sightedness or myopia |
(b) Long sightedness or hypermetropia |
|
(c) Presbyopia |
(d) Astigmatism |
An electron is moving in electric field and magnetic field it will gain energy from
|
(a) Electric field |
(b) Magnetic field |
(c) Both of these |
(d) None of these |
For comparing the e.m.f.'s of two cells with a potentiometer, a standard cell is used to develop a potential gradient along the wires. Which of the following possibilities would make the experiment unsuccessful
|
(a) The e.m.f. of the standard cell is larger than the E e.m.f.'s of the two cells |
|
(b) The diameter of the wires is the same and uniform throughout |
|
(c) The number of wires is ten |
|
(d) The e.m.f. of the standard cell is smaller than the e.m.f.'s of the two cells |
In the spectrum of light of a luminous heavenly body the wavelength of a spectral line is measured to be 4747 Å while actual wavelength of the line is 4700 Å. The relative velocity of the heavenly body with respect to earth will be (velocity of light is 3
)
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(a) 3 |
|
(b) 3 |
|
(c) 3 |
|
(d) 3 |
A coil having N turns carry a current I as shown in the figure. The magnetic field intensity at point P is
|
(a) |
(b) |
(c) |
(d) Zero |
The radioactive decay of uranium into thorium is expressed by the equation 
where ‘X’ is
|
(a) An electron |
(b) A proton |
(c) A deuteron |
(d) An alpha particle |
