Physics: Post your doubts here!

[hellodjfos;s'ff]

Can anyone explain me the following question?
View attachment 64118

If you want additional reasoning:
A and B are incorrect because we don't know the resistance of the resistors(or whether they are identical), so we can't determine their power loss(so A and B can't be justified).
D is incorrect because again, the power produced by the cell is spread to overcome the resistance in each resistor, so the power is spread over the 3 resistors, not just 1.

 

[Hamnah Zahoor]

So the power produced by the cell is distributed to overcome the resistance of each resistor(this causes power loss). So the power produced by the cell is equal to the power lost in the resistors which is why C is the correct answer. 'Power output of the cell' just means the power produced by the cell.

Thanks a lot.

 

[Kanekii]

The biggest regret in olevels for me was getting a B in physics and maths.

 

[hellodjfos;s'ff]

Thanks a lot.

No worries

 

[Hamnah Zahoor]

Energy is conserved...just think about the energy conversions...the only energy conversion is from electrical to non electrical forms in the resistors which is the power dissipated

Thankyou

 

[hellodjfos;s'ff]

That's good but I'm asking myself...that won't be showing off

I got 8A* and 1A. I took urdu first language so I got an A in that... bad decision.

 

[A*****]

The biggest regret in olevels for me was getting a B in physics and maths.

I don't know what happened with the grade thresholds that tym! Like they were really high for sciences and maths
For maths it was 186/200 for an A*

 

[hellodjfos;s'ff]

I don't know what happened with the grade thresholds that tym! Like they were really high for sciences and maths
For maths it was 186/200 for an A*

The papers were so easy. I couldn't have wished for easier papers

 

[A*****]

I got 8A* and 1A. I took urdu first language so I got an A in that... bad decision.

We knew u were Einstien
Urdu 2nd language is much easier!

 

[A*****]

The papers were so easy. I couldn't have wished for easier papers

Yeah indeed!

 

[hellodjfos;s'ff]

We knew u were Einstien
Urdu 2nd language is much easier!

Yeah i know :/
I would have got an A* in that without putting in much effort

 

[A*****]

Yeah i know :/
I would have got an A* in that without putting in much effort

Yeah! Btw which extra subject did u take? And what are ur subjects now in a level?

 

[A*****]

Thankyou

What were ur grades?

 

[Hamnah Zahoor]

What were ur grades?

Alhamdulillah.....3A*s and 5As

 

[Kanekii]

Thats it im gonna start studying for A2 from july now xD

 

[Hisham Khan]

I was so happy .Kanekii count me in

 

[hellodjfos;s'ff]

Yeah! Btw which extra subject did u take? And what are ur subjects now in a level?

I don't know how to identify an extra subject since BDC Karachi encouraged us to take 9, but I took these in olevels: business, maths, add maths, chemistry, physics, urdu first language, english first language, pak studies, islamiyat.
In a-levels i am taking: maths, physics, chemistry, psychology.

 

[A*****]

Thats it im gonna start studying for A2 from july now xD

Hahahaha....u also tell I'm just curious

 

[hellodjfos;s'ff]

Yeah! Btw which extra subject did u take? And what are ur subjects now in a level?

What about you? O-level and A-level subjects?

 

[A*****]

I don't know how to identify an extra subject since BDC Karachi encouraged us to take 9, but I took these in olevels: business, maths, add maths, chemistry, physics, urdu first language, english first language, pak studies, islamiyat.
In a-levels i am taking: maths, physics, chemistry, psychology.

Niceeee
Wish I had taken add maths too