General Physics - Physics Comprehension

1

rishabh ·2012-03-09 01:42:05

i can't see the pic. can others?

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262

Aditya Bhutra ·2012-03-09 01:47:10

well, at least i can !

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1057

Ketan Chandak ·2012-03-09 02:37:12

i can see dis....

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johncenaiit ·2012-03-09 02:48:04

i can't....

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21

Swaraj Dalmia ·2012-03-09 05:16:38

16)(C)
Consider metal to be a no. of wires,of cross-sectional area=1.
Force on each wire=Bih=Bhj [i=j*a=j*1=j]
Total force=Bhj*w*l [force on one*no. of wires]
Pressure=force/area=Bhjwl/h*w=Bjl

17)(C)Flemings left hand rule.also hint from Q 18.

18)(A)
If metal is moving inwards,the free elec are moving inwards,the current is outwards,Hence force on elec. is downwards.Current is upwards.
Note that this induced current will make the metal move in the opp. direction,reference from Q17[in accordance with lenz's law]

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262

Aditya Bhutra ·2012-03-10 00:30:50

Ans. 16C 17D 18B

@swaraj - i think your explanation is correct but your answer does not match.

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71

Vivek @ Born this Way ·2012-03-10 05:59:38

I too can't see.

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7

Sigma ·2012-03-19 09:24:19

Me too.

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1

Ayush Dube ·2012-03-21 02:52:55

wherez d pic

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1

Manoj Srivastava ·2012-04-14 18:42:26

Hi all, get relevant and useful flash animations in physics at http://www.mksfoundation.com/flashlets.aspx
and lot of other free stuff for JEE preparation at this site.

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