How should people wearing spectacles work with a microscope
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(a) They cannot use the microscope at all |
(b) They should keep on wearing their spectacles |
|
(c) They should take off spectacles |
(d) (b) and (c) is both way |
(c) They should take off spectacles
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion : Electrons move away from a low potential to high potential region.
Reason : Because electrons has negative charge
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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. |
Which source is associated with a line emission spectrum
|
(a) Electric fire |
(b) Neon street sign |
(c) Red traffic light |
(d) Sun |
A thin prism P1 with angle 4° and made from glass of refractive index 1.54 is combined with another thin prism P2 made from glass of refractive index 1.72 to produce dispersion without deviation. The angle of prism P2 is
|
(a) 2.6° |
(b) 3° |
(c) 4° |
(d) 5.33° |
Consider a radioactive material of half-life 1.0 minute. If one of the nuclei decays now, the next one will decay
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(a) After 1 minute |
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(b) After |
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(c) After |
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(d) After any time |
When light travels from glass to air, the incident angle is 
and the refracted angle is 
. The true relation is
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(a) |
(b) |
(c) |
(d) Not predictable |
When light is refracted from air into glass
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(a) Its wavelength and frequency both increase |
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(b) Its wavelength increases but frequency remains unchanged |
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(c) Its wavelength decreases but frequency remains unchanged |
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(d) Its wavelength and frequency both decrease |
Assertion : The presence of water molecules makes separation of ions easier in electrolyte.
Reason : The presence of water molecules in electrolyte decreases the resistance of electrolyte.
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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. |
