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Physics MCQs thread.

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Plz sum1 explain dis! :(
How ans is 'A' ??
 

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arlery said:
libra94 said:
can someone plz help me with q31 nov 03
here's the link: http://www.xtremepapers.me/CIE/Internat ... 3_qp_1.pdf
im getting 2 A
i first found the total current which is 3A then found the ratio of 6ohm resister and 3ohm resister which is 2:1
then found the current going in 6ohm resister will be 2/3 * 3 which is 2A, can someone please explain me this!!


Maybe the markscheme is wrong. I'm getting 2A as well.
IS IT A ?????????
 
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Hateexams93 said:
arlery said:
libra94 said:
can someone plz help me with q31 nov 03
here's the link: http://www.xtremepapers.me/CIE/Internat ... 3_qp_1.pdf
im getting 2 A
i first found the total current which is 3A then found the ratio of 6ohm resister and 3ohm resister which is 2:1
then found the current going in 6ohm resister will be 2/3 * 3 which is 2A, can someone please explain me this!!


Maybe the markscheme is wrong. I'm getting 2A as well.
IS IT A ?????????

yes
 
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Talha said:
Plz sum1 explain dis! :(
How ans is 'A' ??

v1 is greater than v2 cox V is directly proportional to R. n the resistance ov the parallel combination of 6 n 3 ohms is greater.
i1 is greater cox if u suppose any value of V, n substitute it in the equation V=IR, u will get i1>i2
 
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this one i dint undrstood it completely
 

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how u solve such a question....well i tried to eqaute Pi to Pf(p=momentum)
and constructed another eq. using realtive speed of approach=relative speed of separation thing....bt i cnt get anser...cn u tell me how u constructed the equations
 

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