Recently Active Physics Questions

Consider this situation: A fixed pulley carries a weightless thread with masses m1 and m2 at its ends. There is friction between the thread and the pulley. How can there be friction when the thread is weightless?? where will ...

Please post the complete solutions of the following numericals. I have tried to solve them many ..but unsuccessfully. 1) Two equal +ve point charges are separated by a distance 2a. A point test charge is located in a plane wh ...

A deuteron and an α-particle are placed in an electric field. If F1 and F2 be the forces acting on them and a1 and a2 be their acclerations respectively,then A. a1=a2. B. a1 ≠a2. C. F1=F2 D. F1≠F2 What exactly is a deute ...

Find the equivalent capacitance between A and B..each capacitance is c..Options-- a. C. b. 2C c. C/2 d. none of these. I got C but its wrong according to soln. *Image* ...

There are 2 concentric metal shells of radii r1 and r2(>r1). If the outer shell has a charge q and the inner shell is grounded,,the charge on the inner shell is - _____ ? Pls explain y charge is not 0 ?? ...

b,a,c are three positive numbers in G.P. and a+b+c=abc, then least value of a^4+a^2+7 is equal to (where a^4 is a to the power 4 and a^2 is a to the power 2) ...

why nuclear force is not conservative ????????? ...

WHAT IS ANTIMATTER? WHAT WOULD HAPPEN IF AN ANTIMATTER COMES IN CONTACT WITH A MATTER OF PRORERTIES OPPOSITE TO IT? ...

*Image* is this possible ...

A few conceptual doubts -: 1) In the gravitational attraction between the earth and a stone, can we say that the earth lies in the gravitational field of the stone? If yes how is the gravitational field due to the stone relat ...

i'm a IX student of an ICSE affiliated skool. Nd 2day while teaching the Atomic structure, my teacher said about some isoelectronic species. I didn't get that. will anyone explain me it in way i can understand?? ...

Q. A pendulum of mass m hangs from a support fixed to a trolley.The direction of the string (i.e θ) when the trolley rolls up a plane of inclination α with acceleration "a" is Q.A 50kg man is standing at one end of a 25m lo ...

a charge q wit mass m moves in a non uniform mag field in a plane perp. to the field .....B=B0/x.......mag field is along y axis ...... particle strats frm x=a wit v0 dir. along x axis ...... how far will particle travel bfr ...

A plano-convex lens has thickness of 4cm. when placed on a horizontal table with curved suface in contact with, the apparent depth of bottom most point of the lens is found to be 3cm. If the lens is inverted, the apparent dep ...

A small mass is suspended by a strung from the ceiling of a car.As the car accelerates at a rate "a" the string makes an angle θ with the vertical then tension of string is ? ...

A block of mass 10kg lying on a smooth surface is being pulled by means of a rope of mass 2kg.If a force of 36N is applied at the end of the rope , the tension at the midpoint is ? What is the formula ? ...

A heavya point particle is suspended vertically from O by an inextensible string of length l.The string becomes slack at some angle and the particle proceeds on a parabola.Find the value of V0 if the particle passes through t ...

A 40 kg mass hanging at the end of a rope of length l oscillates in a vertical plane with an angular amplitude \theta _{0} . What is the tension in the rope, when it makes an angle \theta with the vertical ? If the breaking s ...

Is the value of current i=nAe^2VT/2ml or i=nAe^2VT/ml ...

I am facing a lot of problems to solve problems related to RELATIVE MOTION in a projectile. Are there any special formula to solve these type of sums? One more question is there about projectile motion DOWN an inclined plane. ...

Q1) Four athletes are standing at the corners A,B,C and D of a square of side l.They simultaneously start running,such that A runs towards B,B runs towards C,C runs towards D and D runs towards A,each with velocity v.They wil ...

In 1 of the ancient mythological stories of ancient India, there's one that runs like this :- In the big temple of Madras (now Chennai), once a thief decided to try out his luck and skill at his job. He decided to rob the "De ...

i was really confused abt work done by friction. 1)Some authors says dat it is just like a workdone by a conservative force so the expresion is Wfriction=Frictional force*displacement 2)Some says dat it depends on path so the ...

how can we show that white light consists of 7 constituent colours? why the white light passing through a rect. block does not show dispersion? explain the reason why the white light shows the phenomenon of dispersion while p ...

*Image* Q1)In the circuit shown in figure switch S is closed at time t=0.Let i1 and i2 be the currents at any finite time t ,then the ratio i1/i2 a. is constant b.increases with time c. decreases with time d.first increases a ...

A small object is at rest on the edge of a horizontal table.It is pushed in such a way that it falls off the other side of the table,which is 1m wide in 2s.Does the object have wheels ?? ...

Q1. A metallic shell of radius r is surrounded by an isotropic dielectric of dielectric constant k upto a radius R. Find the capacitance of this system. Q2. A metallic sphere of radius a is surrounded by two concentric metall ...

*Image* Two charges +q1 and -q2 are placed at a and b respectively. A line of force emerges from q1(at an angle α with line ab) and terminates at -q2. At what angle will it terminate (β) at -q2 ?? ...

who are the teacher here? ...

Q. A horizontally oriented uniform rod AB of mass m=1.4 kg and length lo = 100 cm rotates freely about a stationary vertical axis OO' passing through its end A. the point A is located at the middle of the axis OO' whose lengt ...