Physics P1 and P2 Discussions

[areela hassan]

It was mentioned that he dove from a large height

no i dont remember i dont think it was....

 

[Shadow]

i remeber the first 3 ans were A

 

[Shadow]

Wat was the ans to that LDR MCQ, i think 4th last

 

[Shadow]

no i dont remember i dont think it was....

i hope it wasn't

 

[altox876]

i hope it wasn't

If it was, then what would be the right answer of that MCQ?

 

[danial 234]

If it was, then what would be the right answer of that MCQ?

tab bhi GP+KE = heat ho ga kyunke us ne ne kaha tha at high speed at start

 

[thementor]

a

ammeter increases voltmeter decreases

exactly....becoz when one lamp has been broken resistance has reduced. allowing more current to flow..the current passes through the voltmeter instead of going directly through the lamp(filament broken)..using V=IR, resitance has reduced...so voltmeter reading decreases

 

[thementor]

1) which graph?
2) dont remeber, i think A
3)added both 10000 n 5000 to calculate G.P.E
4) current same in series, voltage same in parallel
5) not sure, chose pressure decreases, vol increases
6) A
7) A
8) S-N N-S
9) Iron
10) 24 mins
11) Nucleus is small
12) --
13) Fuse blows
14) Virtual,not inverted
15) chose K.E + G.P > thermal
16)towards center
17) both same
18)A
19) C
20) --
21)Polyethene with woolen cloth
22) --
23) i think it came to be 3 x 10^3
24) chose both decrease
25) D
26) Frequency decreases
27) D
Guys correct me if i m wrong

dude for 15 G.P.E is converted to kinetic + thermal

 

[areela hassan]

y

tab bhi GP+KE = heat ho ga kyunke us ne ne kaha tha at high speed at start

yup xactly

 

[Shadow]

exactly....becoz when one lamp has been broken resistance has reduced. allowing more current to flow..the current passes through the voltmeter instead of going directly through the lamp(filament broken)..using V=IR, resitance has reduced...so voltmeter reading decreases

But the circuit was broken coz the filament melted

 

[danial 234]

dude for 15 G.P.E is converted to kinetic + thermal

thementor, i think u misread the ques , the statement was
the diver dives from a point at high speed

 

[Shadow]

dude for 15 G.P.E is converted to kinetic + thermal

Forget that buddy, v have already discussed that wat bout the other ans?

 

[danial 234]

But the circuit was broken coz the filament melted

but there was a connection through the voltmeter.

 

[Shadow]

tab bhi GP+KE = heat ho ga kyunke us ne ne kaha tha at high speed at start

To correct ans yhi hai?? Phir argument kis bat p horaha hai? m also saying this is correct

 

[ritx]

Y

1) which graph?
2) dont remeber, i think A
3)added both 10000 n 5000 to calculate G.P.E
4) current same in series, voltage same in parallel
5) not sure, chose pressure decreases, vol increases
6) A
7) A
8) S-N N-S
9) Iron
10) 24 mins
11) Nucleus is small
12) --
13) Fuse blows
14) Virtual,not inverted
15) chose K.E + G.P > thermal
16)towards center
17) both same
18)A
19) C
20) --
21)Polyethene with woolen cloth
22) --
23) i think it came to be 3 x 10^3
24) chose both decrease
25) D
26) Frequency decreases
27) D
Guys correct me if i m wrong

you got that 'fuse blows' part wrong. It mentioned about overheating cables in a plug. The right answer should have been; the wires in the plug would overheat and melt'

 

[Shadow]

but there was a connection through the voltmeter.

Circuit breaks, no current through ammeter. Lamp's lyt fades away, so how can there b voltage across it?

 

[thementor]

To correct ans yhi hai?? Phir argument kis bat p horaha hai? m also saying this is correct

oh sorry....then...about voltmeter one there was a connecting path through voltmeter....and since total resistance of circuit has reduced, current increases and voltage decreases

 

[Shadow]

Y
you got that 'fuse blows part wrong. It mentioned about overheating cables in a plug. The right anser should have been; the wires in the plug would overheat and melt'

It did not say 'overheating'. They just said 5 appliances were connected so large current flows

 

[papajohn]

Circuit breaks, no current through ammeter. Lamp's lyt fades away, so how can there b voltage across it?

I think it was in parallel -not sure abt it.

 

[danial 234]

Y
you got that 'fuse blows part wrong. It mentioned about overheating cables in a plug. The right anser should have been; the wires in the plug would overheat and melt'

u are right. i also wrote that plug would overheat. because each appliance is getting the right supply. while the current is large only in plug and lead