Physics: Post your doubts here!

[Thought blocker]

Thanks, the second part is strange!

Ikr

 

[ZaqZainab]

a i) (1/100)* +/- 2.05 = +/- 0.02
a ii) I AM NOT SURE midha.ch ZaqZainab usama321 DO CORRECT ME
For max value we have to take + sign, so 2.05+0.02 that gives 2.07, but in ms it is 2.08 why ???

You are correct but you forgot about the uncertainty of ±1 digit

 

[Thought blocker]

You are correct but you forgot about the uncertainty of ±1 digit

o teri.. han........................... so we have still +0.01 to add na ?

 

[Faaiz Haque]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_11.pdf

More MCQ questions, somone help.
Q4,8,10,13,16,20,25,27,33

 

[sudeep1097]

well it can be dangerous for a human being pulsed gives short bursts of ultrasound energy this is relatively safer than a continuous.
u can touch a hot metal for short time intervals but if i ask u to hold that metal for 10min u can imagine what would happen

Ohh that's the reason... is it not that if we give continuous pulses then the reflected waves would also be continuous hence we cannot differentiate which boundary the wave is reflected from??? can you clear this???? thanks you

 

[sudeep1097]

Thansk a lot Sudeep.
Btw i'm not getting Q33 at all, the other two I get, I guess I had trouble in this chapter, cause I don't remember krichoff's laws.
I guess i'll ask my teacher about this one, thanks though

Haha your welcome sorry I could not make it clear about this one

 

[Mohammed salik]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s07_qp_1.pdf
Q33 Plz!!
Thanks in Advance!

 

[Thought blocker]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s07_qp_1.pdf
Q33 Plz!!
Thanks in Advance!

λ = m
h = m
ρ = kg/m³
g = m/s²
v² = m²/s²

A) m²/s²
B) 1/s²
C) kg / ms²
D) m^4 / kg*s²

Choice A.

 

[Mohammed salik]

λ = m
h = m
ρ = kg/m³
g = m/s²
v² = m²/s²

A) m²/s²
B) 1/s²
C) kg / ms²
D) m^4 / kg*s²

Choice A.

Thanks , But
I mentioned Q 33!!!

 

[ZaqZainab]

Thanks , But
I mentioned Q 33!!!

V1= 5000/ (5000+5000) x 2 = 1V then V2= 3000/ (3000 + 2000) x 2 = 1.2 so V1 - V2 = -0.2 so C

 

[Thought blocker]

V1= 5000/ (5000+5000) x 2 = 1V then V2= 3000/ (3000 + 2000) x 2 = 1.2 so V1 - V2 = -0.2 so C

Is there any formula ?

 

[Mohammed salik]

V1= 5000/ (5000+5000) x 2 = 1V then V2= 3000/ (3000 + 2000) x 2 = 1.2 so V1 - V2 = -0.2 so C

Ah thanks, That was soo Easyyyy!!! ugh..

 

[Mohammed salik]

Is there any formula ?

Vout= Vin*(R1/R1+R2)

 

[Thought blocker]

Vout= Vin*(R1/R1+R2)

Vout and Vin means ?

 

[Mohammed salik]

Vout and Vin means ?

Vout =Output Voltage, And Vin = Input Voltage which would be Total supplied by the Battery!

 

[Thought blocker]

Vout =Output Voltage, And Vin = Input Voltage which would be Total supplied by the Battery!

Ty

 

[Thought blocker]

Vout= Vin*(R1/R1+R2)

Where is this formula written in our book ?

 

[Mohammed salik]

Where is this formula written in our book ?

Which Book Do u use? I use Physics coursebook for As an A level!

 

[Thought blocker]

Which Book Do u use? I use Physics coursebook for As an A level!

I use the same

 

[Mohammed salik]

I use the same

Pg 187
Practical circuits!