tag:blogger.com,1999:blog-15789884390647992342017-04-30T15:44:21.864+05:30MyRankA user friendly Online Educational Portal, a Mentor to the students and an Ultimate Self Assessment Platform
Bhanu Satapatihttps://plus.google.com/116355447280206428989noreply@blogger.comBlogger598125tag:blogger.com,1999:blog-1578988439064799234.post-59762369213664255812017-04-30T11:56:00.003+05:302017-04-30T11:58:34.561+05:30Puzzle 4
Puzzle 1: A man was outside taking a walk, when
it started to rain. The man didn’t have an umbrella and he wasn’t wearing a
hat. His clothes got soaked, yet not a single hair on his head got wet. How
could this happen?
Puzzle 2: A cowboy rides into town on Friday,
stays for three days and then leaves on Friday. How did he do it?
Puzzle 3: You walk across a bridge and you see
a boat sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-3685784128296224842017-04-30T11:47:00.001+05:302017-04-30T11:47:41.541+05:30Photo Electric Effect
It
is the emission of electrons from the surface of certain substances, mainly
metals, when they are illuminated by electromagnetic radiations like X-rays,
ultraviolet and even visible light. The electrons emitted are called photo electrons.
Experiment to
Demonstrate Photoelectric Effect:
In
figure (a) A and C are two zinc plates, sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-31540939022486651762017-04-29T12:35:00.001+05:302017-04-29T12:35:28.780+05:30Brain Teaser 11 [With Answers]
Puzzle 1:
14 students in a class failed in both QT and Accounts. 20 failed in QT, but 32 failed in Accounts. How many students were there in total?
Answer:
20 + 32 - 14 = 38 students.
Puzzle 2:
Solve this puzzle:
S is as much older than K as he is
younger than P. N is as old as K .Which of the following is wrong?
a) K is younger than P.
b) N is younger than P.
c)sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-26760638073677788922017-04-29T12:29:00.001+05:302017-04-29T12:29:14.751+05:30Standard form of the ellipse
Let S be the focus, ZK the directrix and e the eccentricity of the ellipse whose equation is required.
Draw SK perpendicular from S on the directrix. Divide SK internally and externally at A and A’ (on SK produced) respectively in the ratio e : 1.
∴ ⇒ SA = e. AK … (1)
And
⇒
SA’ = e A’K … (2)
Since A and A’ are such points that their distances from the focus bear sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-3660210162114060112017-04-28T13:24:00.001+05:302017-04-28T13:25:38.491+05:30Brain Teaser 11
Teaser 1:
14 students in a class failed in both
QT and Accounts. 20 failed in QT, but 32 failed in Accounts. How many students
were there in total?
Teaser 2:
Solve this puzzle:
S is as much older than K as he is
younger than P. N is as old as K .Which of the following is wrong?
a) K is younger than P.
b) N is younger than P.
c) S is older than N.
d) P is sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-71798241213250536472017-04-28T13:17:00.001+05:302017-04-28T13:17:07.870+05:30Crystal Field Theory (CFT)
Crystal field theory differs from valence bond theory in viewing the complex as held together by purely electrostatic attractions. That is, it ignores covalent bonding.
The most significant aspects of the theory is its concern with the effect that the ligands have on the energies of the d-orbitals of the metal. The ligands are viewed as pointing their negative end in the direction of the sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-41119784952138747382017-04-26T11:27:00.003+05:302017-04-26T11:27:52.542+05:30Clock Puzzles 7 [With Answers]
Puzzle 1:
Answer: 6:06
Explanation: From Left to Right, The time on the watches increases by 2 hours 3 minutes, then decreases by 1 hour 16 minutes, alternately.
Puzzle 2:
Answer: 3:36
Explanation: On each watch, the time shown contains two digits that are the same.
Puzzle 3:
Answer: 6:45
Explanation: From left to right, add 1 to the value of each digit on the sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-19351400352145649842017-04-26T11:12:00.004+05:302017-04-26T11:12:43.933+05:30Ohm’s law
General form of Ohm’s law:
At a constant temperature potential difference across a conductor
is directly proportional to the current passing through it
V α I V = RI
Ohm’s law is material dependent because it is defining resistance
of the material. Those which obeys ohm’s law and are known as ohmic or linear
conductor, otherwise non-ohmic or nonlinear conductor.
Proof: Current
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-79883109585972211262017-04-24T13:24:00.002+05:302017-04-24T13:24:45.972+05:30Clock Puzzles 7
Puzzle 1:
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Puzzle 2:
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Puzzle 3:
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Puzzle 4: Calculate the
angle between the two hands of clock when the clock shows 4 : 20 p.m. ?
A) 5 sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-66677678461064624742017-04-24T13:11:00.003+05:302017-04-24T13:11:54.333+05:30Diameter
The locus of the mid-points of a system of parallel chords of a conic is known as its diameter.
Equation of diameter of a parabola:
Let y = mx + c be a system of parallel chords of the parabola y² = 4ax.
Here, m is a constant and c is a variable.
The line y = mx + c meets the parabola y² = 4ax in the points say P and Q whose ordinates (say y₁ and y₂) are the roots of the equation.
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-23718237182416705142017-04-23T12:58:00.003+05:302017-04-23T12:58:58.281+05:30Puzzles 3 [With Answers]
Puzzle 1: You are wandering around in the desert and are
exhausted. You meet a nomad and ask him for the way out.
There are only two
choices to pick: either go to the left or to the right. One way leads to an
oasis and the other way is "the road to death".
However, the nomad is
a liar and you cannot trust him. But you know for certain that he is
systematically lying:
If he lies on one day, sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-75136527270240467442017-04-23T12:33:00.001+05:302017-04-24T13:26:44.430+05:30Interhalogen compounds:
Reaction between two different halogens
Types: XX’, XX’3, XX’5 and XX’7
X - Halogen of larger size, more electropositive
X’- Halogen of smaller size
Preparation:
Direct combination.
Product depends on the concentrations of the reactants.Cl₂ + F₂ → 2ClFCl₂ + 3F₂ → 2ClF₃
Properties:
Covalent molecules
Diamagnetic
Volatile solids/liquids {except ClF which is a gas}
More sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-70039422494397786592017-04-21T14:58:00.001+05:302017-04-21T15:21:56.275+05:30ICAR Notification Released
Important Dates:
AIEEA - UG/
PG - 2017
Date and Time of
examination - UG
10 - 06 - 2017 (Saturday)
10:00 A.M to 12:30 P.M (2 ½ hrs)
Date and Time of
Examination - PG
11 - 06 - 2017 (Sunday)
10:00 A.M to 12:30 P.M (2 ½ hrs)
Commencement of Online
Application submission
20 - 04 - 2017 (Thursday)
Last date of online
application
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-17395821324745998362017-04-21T12:18:00.003+05:302017-04-21T12:18:32.106+05:30Puzzles 3
Puzzle 1: You are wandering around in the desert and are
exhausted. You meet a nomad and ask him for the way out. There are only two choices to pick: either go to the left or to the right.
One way leads to an oasis and the other way is "the road to death". However, the nomad is a liar and you cannot trust him. But you know for certain that he is systematically lying:
If he lies on one daysowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-27477604124595264612017-04-21T12:02:00.001+05:302017-04-21T12:02:10.265+05:30Motional E.M.F:
Consider a closed conducting loop ABCD, with the arm CD sliding, placed in a horizontal plane. Let B be a uniform magnetic field perpendicular to the plane of the loop and directed into it.
Let the conductor CD be moved towards right with a velocity v. As the conductor CD slides, the area of the closed loop changes from ABCD to ABEF, during a small interval of time dt.
The change in fluxsowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-35646594329372545322017-04-20T13:22:00.002+05:302017-04-20T13:22:45.581+05:30Puzzles 2 [With Answers]
Puzzle 1:
How many months have 28 days?
Answer: All 12 months.
Puzzle 2: Name four days of the week that start with the letter “t”?
Answer: Tuesday, Thursday, today, and tomorrow.
Puzzle 3:
A train leaves from Halifax, Nova Scotia heading towards Vancouver, British Columbia at 120 km/h.
Three hours later, a train leaves Vancouver heading towards Halifax at 180 km/h. Assume sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-78409892307968048742017-04-20T13:17:00.002+05:302017-04-20T13:37:45.016+05:30Standard form of Parabola and its Various Forms II
Focal chord: A chord of parabola is a focal chord, if it passes through focus.
Some other standard forms of parabola:
A. y² = - 4ax
Co - ordinates of vertex = (a, 0).
Co - ordinates of focus = (-a, 0).
Equation of directrix = x - a = 0.
Equation of axis is y = 0.
Length of latus rectum = 4avi.
Focal distance = a - x.
B. x² = 4ay
Co - ordinates of vertex = (0, 0).
Co - sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-19160511904615884232017-04-19T12:52:00.004+05:302017-04-19T12:52:44.631+05:30Puzzles 2
Puzzle 1:
How many months have 28 days?
Puzzle 2: Name four days of the week that start with the letter “t”?
Puzzle 3:
A train leaves from Halifax, Nova Scotia heading towards Vancouver, British Columbia at 120 km/h.
Three hours later, a train leaves Vancouver heading towards Halifax at 180 km/h. Assume there’s exactly 6000 kilometers between Vancouver and Halifax.
When they sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-46829607873000973822017-04-19T12:42:00.001+05:302017-04-19T12:42:32.407+05:30Oxoacids of Sulphur
⇒ The oxoacids of sulphur are more numerous and more important than those of Se and Te.
⇒ Many of the oxoacids of sulphur do not exist as free acids, but are known as anions and salts.
⇒ Acids ending in ous have S in the oxidation state (+IV) and form salts in -ite.
⇒ Acids ending in -ic have S in the oxidation state (+VI) and form salts ending in -ate.
Acids
Structure
sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-49156035139288190222017-04-17T13:17:00.003+05:302017-04-17T13:17:27.489+05:30Brain Teasers 10 [With Answers]
Puzzle 1: Insert the missing alphabets to
complete the series.
T, F, S, E, T, T, F, _, _, _, _, T, T, T, T
Answer: S, E, T, T
Explanation: The first "T" stands for
Two. Now go on adding 2 to the series and take the first letter: Four, Six,
Eight, Ten, Twelve, Fourteen. This way, we will get Sixteen, Eighteen, Twenty,
Twenty-two or S, E, T, T.
Puzzle 2: If you are supposed to takesowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-79689667340624064002017-04-17T13:06:00.001+05:302017-04-17T13:40:13.079+05:30Magnetic Intensity (H)
The ability of a magnetic field to magnetize a material medium is called its magnetic intensity H. Its magnitude is measured by the number of ampere-turns flowing round unit length of a solenoid, required to produce that magnetic field.
Let the field due to a solenoid of n turns per meter length be H = ni, where i is the current and n = N/l, N is the total number of turns and l the length ofsowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-80461331778727370082017-04-16T14:56:00.003+05:302017-04-16T14:59:59.004+05:30Brain Teaser 10
Puzzle 1: Insert the missing alphabets to complete the series.
T, F, S, E, T, T, F, _, _, _, _, T, T, T, T
Puzzle 2: If you are supposed to take pills at half an hour intervals, how many minutes would 5 pills last?
Puzzle 3: In a class test Tony scored 160 marks in Geography and History together. If one third of his marks in Geography equals to half of the marks he scored in Historysowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-536969278637042262017-04-16T14:41:00.002+05:302017-04-20T11:33:38.199+05:30Standard form of Parabola and its various forms
Equation of parabola in its standard form: Let S be focus and ZZ’ be directrix of a parabola. Draw SK perpendicular from S on directrix and bisect SK at A
⇒
AS = SK
Where A lies on parabola
⇒ SK = 2a
⇒ SA = SK = a
Let choose A be origin, AS as X - axis and AY line perpendicular AS as Y - axis.
Then co - ordinates S = (a, 0) and equation of directrix is x + a = 0
P liessowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-32838659430318603922017-04-15T12:14:00.001+05:302017-04-15T12:16:34.310+05:30Clock Puzzles 6 [With Answers]
Puzzle 1: Between 4 & 5 O'clock, the time when the hands coincide is:
A) 4 : 21 9/11 B) 4 : 24 3/11
C) 4 : 22 D) 4 : 23 9/11
Answer: Option 'A'
Explanation: 4 * 30 = 120 + 0 * 2/11
240/11 = 21 9/11 min
Puzzle 2: At what angle the hands of a clock are inclined at 15 minutes past 5?
A) 58 1/2 degrees B) 64 degrees
C) 67 1/2 sowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0tag:blogger.com,1999:blog-1578988439064799234.post-58453933520751940192017-04-15T12:00:00.002+05:302017-04-15T12:00:23.708+05:30Intersection of line and circle
The
equation of a family of circles passing through the intersection of circles x² + y² + 2gx + 2fy + c = 0 and line L = lx + my + n = 0 is x² + y² + 2gx + 2fy + c + λ (lx + my + n) = 0 i.e., S + λ L = 0 where λ is any real.
The
equation of family of circles passing through the points A (x₁, y₁) and B (x₂, y₂) is (x - x₁) (x - x₂) + (y - y₁) (y - y₂).
(Or)
(x - x₁) (x - x₂) + (y - y₁) (ysowjanya satapathihttps://plus.google.com/117970606967475058687noreply@blogger.com0