- AElectrons only.
- BHoles only.
- CBoth electrons and holes.
- DNeither electrons nor holes.
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Assertion : The tyres of aircraft's are slightly conducting.
Reason : If a conductor is connected to ground, the extra charge induced on conductor will flow to ground.
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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. |
An achromatic prism is made by combining two prisms and
; where μ represents the refractive index. If the angle of the prism
is 10°, then the angle of the prism P2 will be
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(a) 5° |
(b) 7.8° |
(c) 10.6° |
(d) 20° |
In a Young's double slit experiment, the fringe width is found to be 0.4 mm. If the whole apparatus is immersed in water of refractive index 4/3 without disturbing the geometrical arrangement, the new fringe width will be
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(a) 0.30 mm |
(b) 0.40 mm |
(c) 0.53 mm |
(d) 450 micron |
Select the right option in the following
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(a) Christian Huygens a contemporary of Newton established the wave theory of light by assuming that light waves were transverse |
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(b) Maxwell provided the compelling theoretical evidence that light is transverse wave |
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(c) Thomas Young experimentally proved the wave behaviour of light and Huygens assumption |
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(d) All the statements give above, correctly answers the question “what is light” |
An α particle and a proton travel with same velocity in a magnetic field perpendicular to the direction of their velocities, find the ratio of the radii of their circular path
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(a) 4 : 1 |
(b) 1 : 4 |
(c) 2 : 1 |
(d) 1 : 2 |
A simple microscope has: