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Syllabus

speed c: light in vacuum to the speed of light in glass,)is found to vary with the

wavelength µ = A + B/λ2

where A and B are constants. Using the principle of homogeneity determine the

dimensions and SI units of A and B

vertices of a regular hexagon. The electric field

strength at centre is E. If –Q charge is removed,

then electric field strength becomes E′. E′ is equal

to

(1) Zero (2) 2E

(3) E (4) 2E

Please explain each and every step with reason as i coudn't understand the steps of this in NCERT

If P,Q,R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity (a) (P-Q)/R (b) PQ-R (c) PQ/R (d) (R+Q)/Pbe placed for it to be in equilibrium? Where will be the new position if both were positive charges?

Ans: a from e and 2a from 4e. a/3 from e and 2a/3 from 4e

if f(x) = x/sinx , x not equal to 0

k , x=0

is continuous at x = 0, then write the value of k

What method should we use to find dimension of a quantity which is part of a trigonometric function?

for example,

Position of a body is represented by r = A sin Bx + C sin Dt where x is in metres and t is in seconds. What is the dimension of B/D?

If possible can you show a few more examples of solving such questions?

^{2})/at where E is energy, x is distance and t is time.Ans - 5/3F, 4/3F and 3F

Please show step by step working

pls answer the question with the same values , don'thyperlink a sum of the same kind.

Thank u sooo much

I attended the unit and measure test- i could get only 66% - need your help to enhance my score..

Want your feedback on the area of improvement.

Regards

V. Sourish

- 1degree54minutes
- 0degree 30minutes

into radiansGiven X=a

^{2}b^{1/3}/ c^{3.}find the error percentage of X if the percentage of errors in a,b,c are 2,4, and 5 respectively.sir please clarify my doubt.

2) Where must an 800N object be hung on a uniform rod of weight 100 N so that a girl at one end supports 1/3rd of the weight as compared to that supported by a woman at the other end?

3) A metre stick is balanced on a knife edge at its centre. When two masses each of mass 15 g are put one on top of the other at the 22.0 cm mark, the stick is found to be balanced at 45.0 cm. What is the mass of the metre stick?

4) a. If ice on the polar caps melts, how it affect the duration of the day b. How acrobats make use the principle of conservation of momentum c. A boy is standing on a turn table rotating at constant angular speed. If he stretches his hands outward how the angular speed of the table affected? d. How you distinguish a raw egg and boiled egg using law of conservation of angular momentum? (both are identical in mass)

5) A student stands at the centre of a turntable with his two arms outstretched. The turntable is set rotating with an angular speed of 80 rev/min. How much is the angular speed of the child if he folds his hands back and thereby reduces his moment of inertia to 2/5 times the initial value ? Assume that the turntable rotates without friction. (b) Show that the child’s new kinetic energy of rotation is more than the initial kinetic energy of rotation. How do you account for this increase in kinetic energy?