PHYSICS PROB!!!

[22shimmer22girly]

hey guys how do we solve question 17,27,31,34 in varient 12 ????

 

[vishalgodhani]

17)A becoz there is less rise in temp
27)D becoz current flows from negative terminal to positive terminal so lamp D is near to it ..so D is ans
31)a dont know how to explain...
34)C becoz neutron has no chrge...
i hope i answered ur ques
plz....... like if it is useful........

 

[22shimmer22girly]

thankss

 

[vishalgodhani]

ur wlcome
its my job to help others

 

[sarah biebz]

Q27) current flows from positive to negative terminal because we are using conventional current in physics . The answer is D because
1) if A blows up C and D can still light up in their own separat circuit [ an advantage of parallel circuits].
2) if B blows up the same will happen as with A
3) if C blows up , then A , B and D will light up in their circuit.
4) if D blows the whole circuit is not complete and there is a gap preventing current from reaching the other terminal.
Q31) the fuse and the circuit breaker should be fitted in the live wire because it's the one carrying the negatively charged current which posses the greatest hazard
I HOPE I HELPED =D

 

[omaaaar]

Could someone tell me how to solve question 25 of 0625 w_04_qp_1

 

[omaaaar]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w04_qp_1.pdf
Here is the link of the paper

 

[gary221]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w04_qp_1.pdf
Here is the link of the paper

in a magnet, the magnetic field lines always are radiated from NORTH to SOUTH.
the compass aligns itself in the direction of the field lines.
Since we know that the field line emerge from the north, and move towards south. so the ans is A
Hope i helped.
All credit to Nibz

 

[vishalgodhani]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w04_qp_1.pdf
Here is the link of the paper

its simple man because in magnetic field it moves from "north to south" always
remember it ................

 

[22shimmer22girly]

thanks sara biebz

 

[Wolfgangs]

Guys, there was a question about the loudness I assume which involves changing amplitude and wavelength. What was the question exactly and what is its answer? Please reply soon.

 

[humdono]

anyone wants notes for physics paper 1

 

[vishalgodhani]

anyone wants notes for physics paper 1

yes give........ fast.........

 

[sarah biebz]

thanks sara biebz

that's what IG students r for =D

 

[omaaaar]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s05_qp_1.pdf
Could someone tell me why the answer to Question 29 is D,not C
And in Question 32 why the answer is B,not A

 

[sarah biebz]

Q29) i'm not sure i can explain but i'll try. see when two components are in parallel it doesn't mean that they are just in separate wires and that's it . u have to imagine holding the two ends of the wire and then u should see if the other component is connected after the junction ur holding but if the two components are both between the junction it's in series.
Q32)because there must be a sliding contact for a direct variety of current values .
Hope i helped =)

 

[omaaaar]

Thanks but in question 32 in option A there is a variable resistor so p.d can be varied by it also

 

[cookiemaker]

In A the bulb and the variable resistor aren't connected. Current will take the shorter route and just go to the variable resistor and not the bulb. Hope this makes sense.

 

[omaaaar]

thanks

 

[omaaaar]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w05_qp_1.pdf
Question 21 the answer is A could you explain it in detail
And Question 39 of the same paper that why the number of neutrons becomes less