Qualification > Sciences
paper 1 physics HERE ONLY~!!!!!!!
nid404:
--- Quote from: Igcseboy on June 09, 2009, 06:06:31 pm ---When electricity is transmitted over long distances, energy is wasted. How can the wasted
energy be kept as small as possible?
A Keep the current in the transmission lines as large as possible.
B Keep the power supplied to the transmission lines as large as possible.
C Keep the resistance of the transmission lines as large as possible.
D Keep the voltage supplied to the transmission lines as large as possible.
this one also plzz
--- End quote ---
D. power loss=I2R...so I and R can't be big. It has to be Voltage
samin6n:
ON 2003 ques.6,21 and 27...dont get them...explain plss :-\
Ghost Of Highbury:
ans 6.) mass of half oil = 1.3 - 0.9 = 0.4
therefore mass of only full oil in the bottle = 0.4 * 2 = 0.8
therefore mass of only bottle = 1.3 - 0.8 = 0.5
nid404:
--- Quote from: samin6n on June 09, 2009, 06:34:03 pm ---ON 2003 ques.6,21 and 27...dont get them...explain plss :-\
--- End quote ---
Q.6- okay theoritically say x is the mass of the bottle
then 1.30+x/2=0.90
x=0.50kg
Q.21-waves travel least in shallow water. So check the distance..A is least
Q.27- This is B cuz the steel ball gets attracted to the magnet
Ghost Of Highbury:
21) notice the waves near A
they are different
27.) i think it shud be B or C
mostly C
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