Recently Active Physics Questions

A wind powered generator converts wind energy into electrical energy . assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electrical energy. for wind speed 'v', the electrica ...

Which of the following is/are correct: ...

What is the minimum velocity of a projectile to cross a point (a,b) if it starts from the origin? Please show the proof. ...

The figure shows a ray incident at an angle i=π/3 . The ray is refracted and angle of refraction is r. The value of r changes between 0 to π/2when the ratio μ1/μ2 = k is changed. If the plot drawn shows the variation of | ...

I want some question bank on Chapter Motion for Practice. ...

A vertical pencil of rays comes from the bottom of a tank filled with a liquid.When it is accelerated with an acceleration of 7.5 m/s2 , the ray is seen to be totally reflected by liquid surface.What is the minimum possible r ...

A body of mass M is kept in rest on an inclined plane of inclination angle ~ heta . Net force acting on it is: ...

Gradient of an inclined plane gives us an idea about (according to literal definition): ...

Two long, parallel conductors carry currents i1=3.0 A and i2=3.0 A, both directed into the page, detemine the magnitude of the resultant magnetic field at point P. *Image* ...

In a series LCR circuit the frequency of the source is half of the resonance frequency. Then how can I comment about the nature of the circuit,,,like whether it is capacative or inductive or purely resistive?? ...

In the figure shown a light container is kept in a horizontal rough surface of coefficient of friction μ= sh/v .A very small hole of area s is made at a depth h.Water of volume v is filled in the container.The friction is no ...

Let F,FN and f denote the magnitudes of the contact force,normal force and the friction exerted by one surface on the other kept in contact.If none of these is zero, (a)F>FN (b)F>f (c)FN>f (d)FN-f<F<FN+f ...

A pair of stationary and infinitely long bent wires are placed in the XY plane as shown in the figure. The wire carrying a current of 1.0 ampere each as shown. The segments L and M are along X- axis, the segments P and Q are ...

Magnetic fields at two points on the axis of a circular coil at a distance of 0.05 m and 0.2m from the centre are in the ratio 8 : 1. The radius of the coil is ...

A proton, a deuteron and an alpha - particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If {{r}_{p}},,,{{r}_{d}} and {{r}_{alpha }} denote respectively the radii of the tr ...

Condition for equilibrium: ...

Mechanical advantage is ...

Match the following: I)pulley    p)always changes direction of application of force II)class I lever q) vr always greater than 1 III) class II lever r) vr always less than 1 IV) class III lever s) lever ...

If I am walking towards east, friction acting on me has a direction: ...

An ammeter has resistance R0 and range I. What resistance should be connected in parallel with it to increase the range to nI ?? ...

A uniform circular hoop is rotating clockwise in the absence of gravity with tangential speed v0 . If v be the velocity of transverse waves travelling on this string then comment on the relationship between v and v0 .(lesser, ...

A non-planar loop of conducting wire carrying a current i is placed as shown in the figure. Each of the straight sections of the loop is of length 2a. The magnetic field due to this loop at the point P (a, 0, a) points in the ...

A long straight wire along the z-axis carries a current i in the negative z direction. The magnetic vector field vec{B} at a point having coordinates (x, y) in the z = 0 plane is ...

Two infinitely long insulated wires are kept perpendicular to each other. They carry currents i1 = 2 A. and i2 = 1.5 A. Find the direction and magnitude of magnetic field produced at P *Image* ...

In an oil experiment,oil droplets of mass m and charge q are droped from a height h at intervals ∂t> ( 2*h)/g . This drops are collected on a large hollow sphere of radius R,through a small hole on the surface of the sph ...

Use of class III lever ...

The use of Fulcrum: ...

A man weighing 60kg stands on an immobile platform ( a disc) with a mass of 100 kg.What are the no. of revolutions per minute made by the platform if the man moves along a circle with a radius of 5 mts. around the axis of rot ...

Which of the following will never be found inside a robot? ...

Some converging light rays fall on a convex mirror of focal length of 30 cm. In absence of the mirror the rays could meet at distance of 20 cm from the pole of the mirror. Where do the rays meet in presence of the mirror? ...