Past IIT JEE Questions - IIT JEE 2009 P1 Q43

62

Lokesh Verma ·2009-04-11 20:45:18

[url=http://iitjee2009solutions.targetiit.com]Solution Key with Question Paper of 2009 IIT JEE[/url]

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1

voldy ·2009-04-13 04:06:12

isn't the answer C ?????

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11

virang1 Jhaveri ·2009-04-13 04:11:34

Let the charge density be k
Q/A = K
Q/4âˆ©r² = k
now let 4âˆ© be C
Q = CK*r²
Q1 = C*K *R²
Q2 = C*K*4R²
Q3 = C*K*9R²
Q1:Q2:Q3

Therefore the rite option is C 1: 4 : 9

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1

ANKIT MAHATO ·2009-04-13 04:18:22

conceptual error virag !

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1

voldy ·2009-04-13 04:23:30

what's wrong ? bolo na ?

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1

kamalendu ghosh ·2009-04-13 04:49:23

Yes ans is b

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1

kamalendu ghosh ·2009-04-13 04:49:40

NOTE CONCENTRIC spheres

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1

rahul wadhwani ·2009-04-13 04:52:25

its B

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Vivek ·2009-04-13 05:45:19

@srinath,virang

it says outer surface charge densities

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1

~AjInKyA~ ·2009-04-13 06:33:06

B

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1

Shreyan ·2009-04-18 22:42:42

can anyone explain why its B???

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9

Celestine preetham ·2009-04-19 00:30:40

its B

note that outer charges are Q1,Q1+Q2 ,Q1+Q2+Q3

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IIT JEE 2009 P1 Q43

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IIT JEE 2009 P1 Q43

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