11JO TUNNE FACTOR LIKHA HUA HAI
AGAR USSE LIKH KAR SAB EXPLAIN KIA HOTA TO
YAAR STATEMENT 2 PADKAR PATA LAG JANA CHAYIYE KI STATEMENT 1 CORRECT HAI
78 Answers
11
106Q34) Asserion Reasonong Type
STATEMENT-I: Force is required to move a body uniformly along a circle
STATEMENT-II: When the motion is uniform, acceleration is zero
how statement 2 is wrong... motion uniform ==> v=const
==> a=dv/dt = 0 ...
106Q33) According to Bohr's theory for a hydrogen-like atom of atomic number z, the
a) radius of an orbit is inversely proportional to z
b) radius of an orbit is directly proportional to z2
c) energy of the electron in an orbit is inversely proportional to z
d) energy of the electron in an orbit is inversely proportional to z2
how (d) ??? i thot E = -13.6Z2/n2 eV ... [2]
106is latus rectum 2a or 4a?? for parabola y2=4ax ?? mujhe abhi latus rectum ki definition bhi padhni padegi... sab bhool gaya hoon......[2]
106Q 58.
initial TE = -GMm/2(R+h) (from Q57)
now when it comes out of earths grav field .. grav PE = 0 and KE is assumed to be 0.. so work done = -(TE) = GMm/2(R+h)
11AUR ISKO BHI ACCHI TARAN SE SAMJAH DO
Q48 comprehension for ques 48-50
We conduct an experiment on determination of young's modulus by Searle's method.
The micrometer attached has a pitch of 1 mm. It has 100 divisions on the circular scale.
On addition of additional mass 100 g , the screw had to be turned just more than 10 times to attain balance. The change in the circular scale reading was 92.
What is the least count of the micrometer?
Your Answer: 10-2 m
Correct Answer: None of these
Score: -1
Explaination :
1/100 mm = 10-5 meters.
Q49 What is the extension of the wire due to the additional mass? (Ans in mm)
Your Answer: 10.08
Correct Answer: None of these
Score: -1
Explaination :
fdas
Q50 What is the slope of the graph plotted in this experiment? (Assume the change in length to be 10 mm)
The units of the graph are in SI units!
Your Answer: Did Not Attempt
Correct Answer: 10-2
Score: 0
11PLEASE KOI 58 BATAO
Q55 A satellite of mass m is orbiting the earth at a height h from its surface.(mass of earth is M and its radius is R)
(55) Kinetic energy of the satellite (a) -GMm/(R+h)
(56) Potential energy of the satellite (b) GMm/2(R+h)
(57) Total energy of the satellite (c) -GMm/2(R+h)
(58) Energy spent to pull the satellite out (d) 2GMm/(R+h)
of the earth's gravitational fiels
Your Answer: b
Correct Answer: b
Score: 1.00
Explaination :
Q56 refer prev ques
Your Answer: a
Correct Answer: a
Score: 1.00
Explaination :
Q57 refer prev ques
Your Answer: c
Correct Answer: c
Score: 1.00
Explaination :
Q58 refer prev ques
Your Answer: d
Correct Answer: b
Score: -1
Explaination :
106yes u dont know how g varies with M only... u need to consider M as well as R....
21hmmmm..... asis thats a nice way of putting it...........
iska matlab if only EITHER of the factors matlab either R or M only 1 is mentioned then v shud go for optn B, isnt it..........
106i think for answer to be (a) the STmnt 2 shud be the M/R2 of moon is less than earth or g of moon is less than earth....
21sahi baat hai,
par agar aisa sochenge to mujhe bata dost ki STAT 2 kya hota to tu ans A likhta?
11yaar ek baat dhyaan se sun(dekh)[9]
if the moon is small then what?
it wont make statement 2 implies b because
A SMALL BODY MIGHT HAVE MORE DENSITY
AND SEE UR EXPRESSION CONTAINS p FACTOR ALSO!!!!!!!!!!
21Q50 What is the slope of the graph plotted in this experiment? (Assume the change in length to be 10 mm)
The units of the graph are in SI units!
Your Answer: .1
Correct Answer: 10-2
Score: -1
Explaination :
slope is change in length vs change in mass
= 10 mm / .100g............................. this shud be 0.1 Kg
= 10mm/1
"THEN ANSWER WILL CUM 2 0.1m/Kg
21MANI then pl. find a mistake in my BOLD statement in post 43........
kyonki if dat is crrct then definitely STATEMeNT B implies A......
11TAPAN Q41 IS CORRECT
the answer should be (B)
as the fact of statement 2 is correct but it doesn't imply statement1
21PL. SEE THIS LINK :
I hav a doubt in an assertion reason ther....
http://targetiit.com/iit_jee_forum/posts/floatation_3207.html
21Q41 Assertion Reasoning type
Statement I - When a simple pendulum is made to oscillate on the surface of the moon, its time period increases.
Statement II - Moon is much smaller compared to earth.
Your Answer: a
Correct Answer: b
Explaination :
it is not the correct reason
Y NOT?
T inv. prop to √g;
g = Gm(4/3)(pi)(R)(Ï)
Is the abov relatioin rong or wot?
11Q24
Three projectiles are fired from the same point with different speeds and different angles.The area of the triangle formed by the particles at any time t is proportional to
Your Answer: not proportional
Correct Answer: t2
Score: -1
21abhi tak lagta nahi kuch zyada hua hai [2]
ek-do wrong cunfirmd hai 68p1, 75-77p2
1357guys there was a terrible mistake in Q 75-77 organic
in 75 product D was supposed to be ask
A is 3,3-dimethylbutene
77-it will be 2,2-dimethylpropanol
sorry for inconvenience
1tapan.........1st ans cannot be 16 i guess....because if its 16 then some of d angles become more than 180°.............
21STILL NO REPLY [2] [17] [17] [2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17][2] [17] [17]
PL. SIR ATLEAST SAY WETHER WAT WE HAV POINTED ARE OUR MISTAKES OR WAT?????[7]