Physics: Post your doubts here!

[hellodjfos;s'ff]

What was the answer of power supplied one
Was it D
Where voltage was 35V

230V was the voltage and 2.3kw was the power, A

 

[Kanekii]

yes

Thank you memory!!

 

[dwightedknight]

View attachment 64203


These are the graphs I put..View attachment 64204

What was the first graph question?

 

[zap-cannon]

Current decreases
P. D increases.

Are you sure ? I think current also should increase as the resistance is getting lower

 

[Kanekii]

Ugh 5 questions wrong now i wanna cry

 

[Kanekii]

Are you sure ? I think current also should increase as the resistance is getting lower

Resistance was increasing

 

[dwightedknight]

Ugh 5 questions wrong now i wanna cry

I am crying already. I wish Allah loved me

Maybe I'm just a horrible human being.

 

[zap-cannon]

It was decrease for both terminal pd and current

Do u remember the option. Was it A or D

 

[hellodjfos;s'ff]

Do u remember the option. Was it A or D

Sadly no, but I am certain it was decrease decrease, because the internal resistance increased so the overall resistance of the circuit increased. V=IR tells us that if resistance increases, current decreases since the V is constant. As for terminal pd, it is the pd that will be used up by the external resistor. Since the internal resistance increases, it uses up more pd meaning a decrease in pd for the external resistor(which is terminal pd).

 

[zap-cannon]

I see
What about the waves question. What is common for red and green light.. and which of the following increases when the star is going away
I think this was the question

Sadly no, but I am certain it was decrease decrease, because the internal resistance increased so the overall resistance of the circuit increased. V=IR tells us that if resistance increases, current decreases since the V is constant. As for terminal pd, it is the pd that will be used up by the external resistor. Since the internal resistance increases, it uses up more pd meaning a decrease in pd for the external resistor(which is terminal pd).

 

[Tom Sewage]

Can anyone explain me how to solve these questions

 

[hellodjfos;s'ff]

I see
What about the waves question. What is common for red and green light.. and which of the following increases when the star is going away
I think this was the question

Frequency is different(they were asking for what is different) for red and green light. The wavelength increases when the star moves away(since frequency decreases).

 

[dwightedknight]

Frequency is different(they were asking for what is different) for red and green light. The wavelength increases when the star moves away(since frequency decreases).

What % marks do you expect?

 

[hellodjfos;s'ff]

What % marks do you expect?

Expecting 40 tbh lol. I don't think I got anything wrong because that paper was super easy.

 

[Candy22]

what was the answer to the S squared/2E thing?(lol this was one of the options)

 

[hellodjfos;s'ff]

what was the answer to the S squared/2E thing?(lol this was one of the options)

Yup

 

[Candy22]

Yup

was that option A or D?

 

[hellodjfos;s'ff]

was that option A or D?

D

 

[Kanekii]

I am crying already. I wish Allah loved me

Maybe I'm just a horrible human being.

Its not true And you never know what the real answers are.

 

[hellodjfos;s'ff]

Why is velocity increase wrong then..

Velocity is constant for all electromagnetic waves.