- AThrough fission process
- BThrough decomposition process
- CBy photoelectric effect
- ✓Through fusion process
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If a glass prism is dipped in water, its dispersive power:
The resistance of an incandescent lamp is
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(a) Greater when switched off |
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(b) Smaller when switched on |
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(c) Greater when switched on |
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(d) The same whether it is switched off or switched on |
A current of 1.5 A flows through a copper voltameter. The thickness of copper deposited on the electrode surface of area in 20 minutes will be (Density of copper = 9000
and E.C.E. of copper = 0.00033 g/C)
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(a) 2.6 |
(b) 2.6 |
(c) 1.3 |
(d) 1.3 |
In a triclinic crystal system
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(a) a ≠ b ≠ c, α ≠ β ≠ γ |
(b) a = b = c, α ≠ β ≠ γ |
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(c) a ≠ b ≠ c, α ≠ β = γ |
(d) a = b ≠ c, α = β = γ |
If two electric bulbs have 40 W and 60 W rating at 220 V, then the ratio of their resistances will be
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(a) 9 : 4 |
(b) 4 : 3 |
(c) 3 : 8 |
(d) 3 : 2 |
Assertion : For best contrast between maxima and minima in the interference pattern of Young’s double slit experiment, the intensity of light emerging out of the two slits should be equal.
Reason : The intensity of interference pattern is proportional to square of amplitude.
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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. |