Emf is most closely related to
|
(a) Mechanical force |
(b) Potential difference |
|
(c) Electric field |
(d) Magnetic field |
Emf is most closely related to
|
(a) Mechanical force |
(b) Potential difference |
|
(c) Electric field |
(d) Magnetic field |
(b) Potential difference
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The chromatic Aberration in lenses becomes due to
|
(a) Disimilarity of main axis of rays |
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(b) Disimilarity of radii of curvature |
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(c) Variation of focal length of lenses with wavelength |
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(d) None of these |
Assertion : The energy (E) and momentum (p) of a photon are related by p = E/c.
Reason : The photon behaves like a particle.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
Two thin lenses of focal lengths f1 and f2 are in contact. The focal length of this combination is
|
(a) |
(b) |
(c) |
(d) |
Newton postulated his corpuscular theory on the basis of
|
(a) Newton’s rings |
(b) Colours of thin films |
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(c) Rectilinear propagation of light |
(d) Dispersion of white light |
In a double slit arrangement fringes are produced using light of wavelength 4800 Å. One slit is covered by a thin plate of glass of refractive index 1.4 and the other with another glass plate of same thickness but of refractive index 1.7. By doing so the central bright shifts to original fifth bright fringe from centre. Thickness of glass plate is
|
(a) 8 mm |
(b) 6 mm |
(c) 4 mm |
(d) 10 mm |