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Physics: Post your doubts here!

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I forgot how to do this ???????????
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_12.pdf
Q37
Mene kisiko sikhaya tha... but m not getting where did I explained........
Anyways..........
H E L P !
In the new connection,. The new circuit also links the green lamp, so it will also light, 12 V was enough to light the red lamp normally previously, but now since the green is also in the circuit, potential divides and ao both lamps light dimly,
 
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Messages
1,983
Reaction score
3,044
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273
if you have any doubt in potentiometers then please read coursebook it explains everything very nicely.
for this question:
now there is less p.d across wire, so less p.d per unit length.
it means that more wire will be enough to balance the same emf of battery.
 
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