Recently Active Physics Questions

A non conducting ring of mass m and radius R has a charge Q distributed over its circumference.It is placed on a rough horizontal surface such that the plane of the ring is parallel to surface.A vertical mag. field B=B0t2is s ...

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at sunset, the sun appears higher than its actual position....can u please explain y??? ...

Difference between which two points gives 230 volts as the p.d.? ...

A body is projected with a speed u in such a direction that the maximum height obtained is equal to its horizontal range. The horizontal range is a)8u2/17g b)5u2/17g c)6u2/13g d)u2/2g ...

A sphere of radius R and surface charge density σ is rotating about an axis passing through its centre with angular velocity ω. Find the magnetic induction at the centre of the sphere. ...

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the friction coefficient between an athlete's shoe and ground is 0.90 .suppose a superman wears these shoes and races for 50 m . there is no upper limit on his capacity of running a) find the minimum time he will take for the ...

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Two identical charge particles enter a uniform magnetic field with same speed but the at angles 30° and 60° with field . Let a,b and c be the ratio of their time periods ,radii and pitches of the helical paths than (a)abc = ...

A man is moving at the speed of 3 km/h due East to him it appears that the wind is blowing from the North direction . Now if he doubles his speed. The wind appears to blow from the North east direction . Then find the magnitu ...

A rod is resting on a plane surface. As shown in figure. The coefficient of friction is u. Angle is theta. Prove that tan-1(1-u2/2u) *Image* ...

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A truck and a car are moving with the same K.E. on a straight line road. If their engines are turned off at the same time, which one of them will stop at a lesser distance? ...

What is optical density exactly???why is it different from the normal density???both are based on the arrangement of molecules in diff. medium....then.... ...

Can you people please name a site where I can learn about the mechanism of different simple gadgets like camera,telescope,radio etc. but with nice illustrations and simple words...please. ...

A concave lens can be converging if it is placed in a liquid of (a) R.I more than its R.I (b)R.I less than its R.I (c)both cases possible (d)never possible ...

A light wave was sent and it returned after 0.00001 secs .Then how much was the distance? ...

why does it appear that the morning sun moves faster than the midday sun? ...

A boy stands in front of a tall wall and claps. The boy continues to clap every time an echo is heard. Another boy finds that the time taken between the firs and 51st clap is 18s. v=? 330m/s 340 m/s 333m/s none ...

Speed of light in air or vacuum is (in cm/s) 3 X10^8 2 X 10^8 2 X 10^5 3 X 10^10 Your Answer d Correct Answer a HOW IT IS POSSIBLE WHEN IT IS IN CM/S? ...

for light to reflect obeying the laws of refection the surface must be smooth rough neither smooth nor rough any surface would do Your Answer d Correct Answer a BOTH IN SMOOTH AND ROUGH SURFACES LAWS OF REFLECTION ARE OBEYED ...

Which of the following is not the characteristic of the image formed by the pinhole camera? real Virtual erect B & D Your Answer c Correct Answer b THE CHARACTERISTICS OF A PINHOLE CAMERA STATES THAT THE IMAGE IS REAL,INVERTE ...

Image formed by a convex mirror is real virtual magnified B & C Your Answer b Correct Answer d Image formed by a convex mirror is always virtual,erect and diminished then why the answer is virtual and magnified?(option d) ...

If 9/10 of an iceberg is underwater what is the density of ice ? 9 gm per cc 900 kg per m^3 Both a and b 9 Kg per m^3 Your Answer b Correct Answer c How 9g/cc =900kg/m^3? ...