Recently Active Physics Questions

A uniform rod of mass m and length l rotates in a horizontal plane with an angular velocity ω about a vertical axis passing through one end . The tension in the rod at a distance x from the axis is ------------------. ans : ...

*Image* and ya diatance b/w point A and infinite length wire is L ...

a block of mass m and having a charge q placed on a smooth horizontal table and is connected to a wall through an unstretched spring of spring const. k.a horizontal electric field E is paraalel to spring is switched on.find a ...

An artificial satellite moving in a circular orbit around the earth has a total(kinetic + potential) energy Eo.Its potential energy is A. -Eo B. 1.5Eo C. 2 Eo D. Eo ...

*Image* ...

Let S1 and S2 be two slits in Young's doubles SLit expt. If the central maxima is observed at P and angle S1PS2 = θ ( θ is small).Find the y coordinates of the 3rd minima assuming the origin to be at the central maxima. λ ...

Q1. Light of intensity I falls on a perfectly reflecting surface at an angle θ with the normal to the surface. Find the force exerted by the light on the surface. Q2. A perfectly reflecting solid sphere of radius r is kept i ...

A particle of mass m moves due to the force = -\alpha m\vec{r} where alpha>0 is a const, and \vec{r} is the radius vector of the particle with respect to the origin. Initially.... \vec{r}=r_0\hat{i} & \vec{v}=v_0\hat{j} wh ...

Why do we consider Earth as an inertial frame , although earth has an acceleration (centripetal) ? Can somebody apply Newton's law from space? ...

*Image* Question. What amount of heat will be generated from the circuit shown in the above fig. after the switch sw is shifted from position 1 to position 2??? answer is Q= ε2C Co/2C+Co please show ur steps?? ...

(A) Graph of vel vs displacement in SHM (B) Graph of KE with height (during ascent) of a projectile ...

The position of a particle with time t is given by x=t3-9t2+24t+1 find the distance travelled in 5 seconds. (Hint: sometimes i give easy questions ;) ) ...

*Image* ...

*Image* ...

Ques1) *Image* A vertical spring is fixed to one of its end and a maseless plank fitted to other end. A block of mass m is released from some height (h) from the top end of the spring which is in relaxed position. Then choose ...

A body is in pure rolling on a fixed horizontal surface . Choose the incorrect statements (A)its point of contact slips with respect to the surface (B)its point of contact has 0 accn (C)its com always moves along a st line (D ...

. A particle, which is constrained to move along the x-axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as F(x)= - kx + ax3 . Here k and a are positive const ...

*Image* ...

A drop of mass m and density ρ is put between two glass plates at a separation 'd'.What is the force of attraction between the plates (T=surface tension) ...

this question may come (my intuition) as comprehension in jee 2010 *Image* ...

2 coherent point light sources are placed at x=\pm \frac{d}{2} . These sources are surrounded by a spherical screen having eqn x^2+y^2+z^2=R^2 . Given R>>d, sources emit monochromatic light of wavelength \lambda=\frac{d ...

An ray of light is incident with grazing angle at (0,0) The refractive index of the medium (in grey) varies with x-coordinate as N=2x. What is the path of the light ray? *Image* ...

How can we superimpose two or more SHM"s? Explain with the help of a diagram? ...

An object is attached to a vertical spring and slowly lowered to its equilirium position.this streches the spring by an amount d.if d same object attachd 2 d same spring is permitted to fall instead,through wat distance does ...

help i hav some doubts in it....des r easy *Image* ...

*Image* the charge q is being brought in from infinity dWfield = Fdr cos180 →dWext = Fdr du=dwext= Fdr r r ∫du=∫Fdr ∞ ∞ U =- kQq/r (Assuming potential energy at infinity to be 0) Here i am bringing in a positive cha ...

*Image* ...

A non conducting ring(mass m,radious r,having charge Q) is placed on a rough horizontal surface(in a cylindrical region with tranverse magnetic field ).The field is increasing with time at the rate R and the coefficient of fr ...

Consider cylindrical region of the magnetic field shown in figure. region 1 and region 2 have magnetic field directed perpendicularly outward and inward respectively . fields are varying with time as region1 :B=3kt region 2:B ...

a 20 cm long capillary tube is dipped into water . the water rises up to a height of 8 cm .if the entire arrangement is put in a freely falling elevator ,the length of the water column in the capillary tube will be .......... ...