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O/N-02, p-1, Physics HELP NEEDED..*

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12345abc:
can u plz explain 27? why wouldn't it be D?

astarmathsandphysics:
if each resistance is 10 then
a. 1/r=1/10+1/10=1/5 so R=5
d. 1/r=1/10+1/20=3/20 so r=20/3=6.7

12345abc:
ok thanx...and could u also plz explain november 2007 22,23,26,32,33,35 and ,37?

Ghost Of Highbury:

--- Quote from: 12345abc on June 02, 2009, 08:28:02 pm ---ok thanx...and could u also plz explain november 2007 22,23,26,32,33,35 and ,37?

--- End quote ---
22 ) Sunbed - it uses UV rays
23 ) A - it is assumed that light reaches in no time, however it still takes very less time
26 ) D - due to the positive charge, the surface opposite to the ball will become negative and thus the other side of the ball will become positive
32 ) B - Due to large current flow, the fuse melts and does its work
33 ) C - the electrons movement is from left to right , however the conventional current is from right to left , using the flemming's left hand rule, the electrons are deflected towards the bottom
35 ) C - as the direction of the magnet is reverse, the pointer moves to the left but as the movement of the magnet stops the pointer comes back to zero
37 ) B - lamp P is getting the full current , but lamp Q and R are each getting half of the whole current.

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