Subject :NSO Class : Class 4
Subject :NSO Class : Class 4
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Subject :NSO Class : Class 8
Ans 4:
Class : Class 8
It should be answer D. If wavelength changes, frequency and time period will also change.
Ans 9:
Class : Class 8
The answer is D. If wavelength changes , then frequency and time period will also change. Wavelength is inversely propotional to frequency and directly propotional to time period.
Ans 10:
Class : Class 8
The correct answer should be D. Because temperature of air increases, density decreases and so, frequency of sound increases. But, according to me, it may or may not affect the wavelength, but the time period will definitely decrease. The options are a bit confusing.....
Ans 15:
Class : Class 9
no it can not be option d as temperature has no effect on frequency. Wheather temperature increases or decreases frequency remains unchanged. So, the answer could be either time period or frequency.
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 3
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Subject :NSO Class : Class 4
Ans 2:
Class : Class 9
Answer C is correct because Red and Blue light are absorbed and used for Photosynthesis . But in D it is written Green light is reflected ( correct ) but is used for Photosynthesis ( incorrect )
Ans 11:
Class : Class 8
No, Answer D is not correct. They are talking about red, blue, and green lights not red, blue, and green pigments in a leaf. Red and blue lights are efficient in photosynthesizing and the green pigment is also efficient in photosynthesizing. Here, they are talking about lights, not pigments in a leaf.
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Subject :NSO Class : Class 9