# 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 ...
replied2013-08-29 06:11:59
• Sir how to approach. *Image* ...
replied2013-08-29 06:10:52
• at sunset, the sun appears higher than its actual position....can u please explain y??? ...
replied2013-08-27 04:54:22
• 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 ...
replied2013-08-20 11:46:33
• A sphere of radius R and surface charge density Ïƒ is rotating about an axis passing through its centre with angular velocity Ï‰. Find the magnetic induction at the centre of the sphere. ...
replied2013-08-20 08:49:49
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replied2013-08-15 19:33:53
• 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 ...
replied2013-08-14 04:45:32
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replied2013-08-14 04:33:51
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replied2013-08-14 02:34:48
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replied2013-08-14 00:38:38
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replied2013-08-13 22:40:52
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replied2013-08-13 22:35:17
• Two identical charge particles enter a uniform magnetic field with same speed but the at angles 30Â° and 60Â° with field . Let a,b and c be the ratio of their time periods ,radii and pitches of the helical paths than (a)abc = ...
replied2013-08-12 07:11:20
• 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 ...
replied2013-08-12 06:48:57
• 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* ...
replied2013-08-12 06:24:21
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replied2013-08-12 05:48:42
• *Image* Please write the solution ...
replied2013-08-12 05:16:47
• 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? ...
replied2013-08-11 10:55:27
• 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? ...
replied2013-08-10 10:58:52
• why does it appear that the morning sun moves faster than the midday sun? ...
replied2013-08-10 04:03:08
• 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 ...
replied2013-08-10 03:55:43
• 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? ...
replied2013-08-10 03:39:59
• 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 ...
replied2013-08-10 03:35:51
• 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 ...
replied2013-08-10 03:33:12
• 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) ...
replied2013-08-10 03:31:40
• 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? ...
replied2013-08-10 02:29:07