Recently Active Physics Questions

Despersive power of an achromatic doublet is 2/3. And the combined focal length of the combiation is 30cm. Find the focal length of each lens......... ...

*Image* Provide a QUANTITATIVE explanation of this demonstration of Bernoulli principle. ...

At high temperaturs we hav to consider vibrational energy along with trans and rotational.... now at high temp. cv=3R/2 for monoatomic Cv>5R/2 for diatomic gases xplain....... ...

*Image* ...

The surface of earth receives solar radiations at the rate of 1400 W/m2 The distance of the centre of the sun from the surface of the earth is 1.5 x 1011m and the radius of the sun is 7 x 108m Treating sun as a black body It ...

*Image* Find relation between α , ax, ay... ...

Plot a curve b/w P vs V plot: A(V0,P0) B(V0,3P0) C(3V0,P0) join A, B, C with straight lines Find Efficiency ...

Do protons hav magnetic moment?? ...

standing wave is created by the superposition of of two transverse waves of equal amplitude travelling in opposite directions, in a long string tied at both ends. stat1 : velocity of C.O.M of a piece of length λ (considered ...

A small collar of massm is given an initial velocity of magnitude v0 on the horizontal circular track fabricated from a slender rod.If the coefficient of kinetic friction is μk, determine the distance travelled before the co ...

A Bicycle moves on a horizontal road with some accleration . The force of friction between the road and the front and rear wheels are F1 and F2 respectively say about F1 and F2 direction . with CLEAR explanation ...

Four equidistant slits of the same width are made one above the other on an opaque sheet & illuminated by a monochromatic parallel beam of light perpendicular to the sheet.Point P & Q are on the screen directly in front of th ...

*Image* If each Roa =Rob=Roc=Rod=Rab=Rbc=Rcd=Rda=R Resistance between o and a is ...

A rod is floating with half of its length submerged in water. inclined at an angle θ with vertical sinθ=3/4. It is supported by a string on one end. Find: (i) the specific gravity of the rod (ii) now the string is cut. what ...

A cylinder rolls up an inclined plane , reaches some height and then rolled down ( without slipping through out ) directions of friction during upward and downward motions are : I think up the incline while climbing and down ...

If 900 question in organic chemistry weren't enough let's crack these: MULTIPLE CHOICE QUESTIONS Five Year Papers 1. As a result of constant unbalanced force a body moves with __________. (Uniform velocity, Uniform Speed, Uni ...

1)The barrier potential of a sillicon p-n junction is 0.7 V. Can we measure it using voltmeter. 2)Which one will you prefer for the rectification of low AC voltages - a Si diode or a Ge diode? Why? 3)Why a transistor cannot b ...

consider the attractive central force of the form F(r)=-K/rn K is a constant For a stable circular orbit to exist a)n=2 b)n<3 c)n>3 d)n=-1 Its a ques with more than one ans correct Please explain the ans also ...

*Image* Find the velocity of fluid which flows through the small hole.( find velocity v , with respect to l & h). Given that whole pipe moves along the given axis & length of pipe is l (part of it containing fluid is h). ...

theres a hollow sphere filled with water................the temperature outside is T(<0 C) and radius of sphere is R.........density of ice is P and thermal conductivity is k................find da time required for da ent ...

an ideal gas is initially at temperature T and volume V Its volume is increased by V' due to an increase in temperature T' Pressure remaining constant The quantity s=V'/(VT') varies with temperature as Isn't the asked quantit ...

as eureka stated lets put up some problemss that might be of good help for jee 2009 revision aspect. i just did not want to mix it up with his thread and make it go unnoticed like my chemistry hub 1}show that the focal length ...

Q.1 Which of the following statement is true & why? (A) Ex= Ey =Ez (B) Ex>Ey>Ez (C) Ex=Ez<Ey (D) Ex<Ey<Ez *Image* Q2. A parallel plate capacitor is charged to potential V by a source of emf . After removing the ...

A hollow cone of dimensions R,H , is hung vertically , (completely)inside a liquid of density 'p' , its vertex just touching the liquid surface.The force due to the liquid acting on the suface of the cone is kÎ pgHR2 where k ...

*Image* ...

A Simple Pendulum consisting of a Mass M attached to a string of length L is released from rest at an angle α. A pin is located swings down, the string hits the pin. The max angle θ which string makes with the vertical afte ...

At t=0, an ant is at(-1m.0m) & a spider is at (1m,0m). The ant starts walking counterclockwisealong the unit circle,& spider starts creeping to the right along the X-axis. The ant"s horizontal speed is always half of the spid ...

assertion:at the centre of the earth a body has centre of mass but no centre of gravity Reason: This is becuse g=0 at the centre of the earth Please explain it also ...

1)is this statement correct Gravitational potential of earth at every place on it is negative it will be negative if we take refrence as infinity Won't it be changed if we change the refrence point 2)Assertion: Even when the ...

the lower end of capillary tube is at a depth of 12 cm in water and the water rises 3 cm in it The mouth pressure required to blow an air bubble at the lower end will be ...