Figure shows a fluorescent lamp. The intensities at points A, B and C are related as

I_{A}

I_{B}

I_{C}

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I_{B}

I_{A}

I_{C}

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I_{A}

I_{C}

I_{B}

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I_{B}

I_{A}

I_{C}

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Solution

The correct option is D $I_{A}$ = $I_{C}$ < $I_{B}$
A and C are symmetrically located with reference to the lamp. So they will have same intensity

Also B is located closest and is normal to the ray from the center of the lamp. So the intensity will be maximum at B

So, $I_{A} = I_{C} < I_{B}$

Answer C) $I_{A} = I_{C} < I_{B}$

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I_{C}

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Question 20
We have three aqueous solutions of NaCl labelled as 'A', 'B' and 'C' with concentrations 0.1 M, 0.01 M and 0.001 M, respectively. The value of van't Hoff factor for these solutions will be in the order ........... .
(a) $i_{A} < i_{B} < i_{C}$ (b) $i_{A} > i_{B} > i_{C}$ (c) $i_{A} = i_{B} = i_{C}$ (d) $i_{A} < i_{B} > i_{C}$