Physics: Post your doubts here!

[hellodjfos;s'ff]

What was the answer for the elastic energy per unit volume? I know it's a repeat question but I forgot the answer for it

 

[hellodjfos;s'ff]

What was the shape of graph of semi conducting diode?

The answer was B. It was the shape of a filament lamp(when it's an IV graph).

 

[DentedBend]

Paper was relatively easier to previous summer papers. There were many repeat questions...

How did I guess that

That energy per unit volume answer was D?

 

[hellodjfos;s'ff]

How did I guess that

That energy per unit volume answer was D?

Yup I got D as well. Thank god because I didn't have much time to do that question.

 

[Psyvlone007]

I guess it was D of that .and diode was B .btw what was of that Q6 which involved that a rock omis thrown on moon?

 

[hellodjfos;s'ff]

I guess it was D of that .and diode was B .btw what was of that Q6 which involved that a rock omis thrown on moon?

If you're talking about the vertical and horizontal force one, it was C(zero horizontal force, constant vertical force).

 

[Psyvlone007]

yeah that was kinda easy But I fooled my self at that time and Did that Non Zero and Constant hotizontal force

 

[zap-cannon]

What about the moments question. The rod p and q one
and what about the stationary wave problem. A node at P. what are the wavelengths of the first five stationary waves?

 

[Psyvlone007]

A for that stationary wave . And Both decrease if that. Rods moment. what was the ans of that greatest current across battery that involved diodes

 

[hellodjfos;s'ff]

What about the moments question. The rod p and q one
and what about the stationary wave problem. A node at P. what are the wavelengths of the first five stationary waves?

A for stationary wave(the option with first wavelength being 2L/1). B for the rods moment question since one rod has a clockwise moment while the other rod had an anticlockwise moment(weight of the man had a clockwise moment which was decreasing since he was getting closer to pivot).

 

[hellodjfos;s'ff]

A for that stationary wave . And Both decrease if that. Rods moment. what was the ans of that greatest current across battery that involved diodes

I can't remember the option but it was the diagram with a parallel circuit in which the direction of the diodes was same.

 

[Psyvlone007]

A for stationary wave(the option with first wavelength being 2L/1). B for the rods moment question since one rod has a clockwise moment while the other rod had an anticlockwise moment(weight of the man had a clockwise moment which was decreasing since he was getting closer to pivot).

Brother i think that Moments one was Both Decrease Because i had studied that Rods had Both A single direction of motion .

 

[zap-cannon]

Shit. I put A for the 1st one but C for the 2nd .. :'(

Brother i think that Moments one was Both Decrease Because i had studied that Rods had Both A single direction of motion .

What about the displacement time graph for the man jumping from a rocket/ helicopter. His velocity time graph was given

 

[hellodjfos;s'ff]

Brother i think that Moments one was Both Decrease Because i had studied that Rods had Both A single direction of motion .

Ok what I did was, I used my ruler as the spring board and put one pencil below the rule and the other one above the ruler. That's how I understood they had moment in the opposite direction. You can test i out right now, use your finger as the spring board(if you want).

 

[hellodjfos;s'ff]

Ok what I did was, I used my ruler as the spring board and put one pencil below the rule and the other one above the ruler. That's how I understood they had moment in the opposite direction. You can test i out right now, use your finger as the spring board(if you want).

And I kept the center of the springboard the pivot so that the weight of the springboard would be taken out/ruled out of the question.

 

[hellodjfos;s'ff]

Shit. I put A for the 1st one but C for the 2nd .. :'(

What about the displacement time graph for the man jumping from a rocket/ helicopter. His velocity time graph was given

It had a hill shape.

 

[blymphocytes]

Heyy someone please help with qns 5,19,21 and 31

 

[zap-cannon]

It had a hill shape.

There was one with a hill and i think that was no 5
But there were other two graph questions, one projectile one. And one another. I am talking about the other one..

 

[hellodjfos;s'ff]

There was one with a hill and i think that was no 5
But there were other two graph questions, one projectile one. And one another. I am talking about the other one..

Tell me a few details about the question?

 

[zap-cannon]

The velocity time graph was like a curve, which became constant after some time. Does it ring a bell ?