- AProton.
- BNucleus.
- CNeutron.
- DElectrons.
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In Young’s double slit experiment, distance between two sources is 0.1 mm. The distance of screen from the sources is 20 cm. Wavelength of light used is 5460 Å. Then angular position of the first dark fringe is
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(a) 0.08° |
(b) 0.16° |
(c) 0.20° |
(d) 0.313° |
In the context of Doppler effect in light, the term ‘red shift’ signifies
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(a) Decrease in frequency |
(b) Increase in frequency |
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(c) Decrease in intensity |
(d) Increase in intensity |
The plate resistance of a triode is 2.5 × 104 W and mutual conductance is 2 × 10–3 mho. What will be the value of amplification factor
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(a) 50 |
(b) 1.25 × 107 |
(c) 75 |
(d) 2.25 × 107 |
In an electromagnetic wave, the electric and magnetising fields are 100 and
The maximum energy flow is
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(a) |
(b) |
(c) |
(d) |
Assertion : The cloud in sky generally appear to be whitish.
Reason : Diffraction due to clouds is efficient in equal measure at all wavelengths.
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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. |
Assertion : Neutrons penetrate matter more readily as compared to protons.
Reason : Neutrons are slightly more massive than protons.
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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 insulated charged conducting spheres of radii 20 cm and 15 cm respectively and having an equal charge of 10 C are connected by a copper wire and then they are separated. Then
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(a) Both the spheres will have the same charge of 10 C |
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(b) Surface charge density on the 20 cm sphere will be greater than that on the 15 cm sphere |
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(c) Surface charge density on the 15 cm sphere will be greater than that on the 20 cm sphere |
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(d) Surface charge density on the two spheres will be equal |