Recently Active Physics Questions

If a sphere of bad conductor is given a charge then it is distributed on outersurface or inner surface?? ...

A lens is placed between a source of light and wall. It forms images of area a1 and a2 on the wall for two positions. The area of source is A) \frac{\sqrt{a_{1}a_{2}}}{2} B) \frac{a_{1}a_{2}}{a_{1}+a_{2}} C) \sqrt{a_{1}a_{2}} ...

if X,V and A denote displacement ,velocity and the accerleration of a particle executing SHM of time period T ,then which of the follownig will not change with time??? 1.A2T2 + 4k2V2 2.AT/X 3.AT+2kX 4.AT/V note, k=pie ...

1.. Identify the correct statement: 1) simple pend. with bob of mass M swings with the angular amplitude of 40°. When its angular amplitude is 20°, tension in string is Mgcos20°. 2) the greater the mass of pendulum the sho ...

A student using a constant volume gas thermometer measures d pressure at d triple point of water (0.01°C) to be 45000 N/m2 and d prssure at d boiling temperature of water (100°C) 2 b 60000N/m2. assume that pressure varies l ...

MORE ADDED1.A beaker containing water is balanced on a pan of a common balance.A solid of specific gravity 1 and mass 5 g is tied to the arm of the balance and immersed in the water of the beaker.The scale pan with the beaker ...

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A diode made by silicon has a barrier potential of 0.7 volts and current of 20mA passes through the diode when a battery of 3 volts and a resistance of R are in series to it, then the wattage of the resistor is ....... a)46 W ...

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*Image* now look into the problem 1.no where written ISOLATED system 2.following ELECTRCI field configuration seems like lines are getting diverged after some distance on both side CONCLUSION::::::::::[considering the level J ...

(!) A locomotive engine approaches a railway station and whistles at a frequency of 400Hz . A stationary observer on the platform observes a change of 40 Hz as the engine passes across him . If the velocity of sound is 330m/s ...

A uniform rod of density ∂ is placed in a wide tank containing a liquid of density ∂o(∂o>∂). The depth of liquid in the tank is half the length of the rod. The rod is in equilibrium , with its lower end resting on ...

Two 20-g flatworms climb over a very thin wall, 10 cm high. one of the worms is20 cm long the other is wider and only 10 cm long. Which of them has done more work against gravity when half of it is over the top of the wall? W ...

A charge Q is placed at each of the opposite corners of a square . A charge q is place at each of the other two corners. If net electrical force on Q is zero then Q/q equals : a) -2/ 2 B) -1 C) 1 D ) -1/ 2 *Image* ans........ ...

My VIT center is in Mayapuri, and I think you guys know what has happened there. If not, just google mayapuri and radiation together. Is it safe to go there?? Scientists are saying they cannot gauge the extent to which the da ...

*Image* Q52. how to differentiate between (1) and (4) .. they have not stated which direction to take positive axis Q43. yeh kya hai? (i mean i know logic gates.. but what are those dotted and solid lines in input? *Image* ...

ther are n wedges which are placed as shown in figure *Image* coefficient of friction is \mu for each surface and masses of wedges are m,m/2,m/4...m/2^(n-1) respectively and after placing on one another they make \theta angle ...

please define seebeck and peltier effect. ...

*Image* A sphere of radius r and mass m has a linear velocity v0 directed to the left and no angular velocity as it is placed on a belt moving to the right with a constant velocity v1. If after sliding on the belt the sphere ...

*Image* A loon the loop apparatus is made of quadrant of radius 4r joined to semi circle of radius r as shown. the track is frictionless and a small particle of mass m slides down starting from the highest point A of the quad ...

A steel ball of radius R=20cm and maass =2kg is rotating about a horizontal diameter with angular velocity w naught=50 rad/sec. this rotating ball is dropped onto a rough horizontal floor and falls freely through a height of ...

*Image* Two discs of masses M and M/4 having radii R andR/2 resp. are kept on a smooth horiontal surface. The larger disc has a freely moving axle pivoted through its centre. the smaller disc having light thread wrapped over ...

*Image* The 2.7 kg cylinder B and 1.8 kg wedge A are released from a bigger triangular wedge C wich is fixed. the angle of inclination of C is 30 degrees frm the horizontal.Assuming that cylinder rolls without sliding on the ...

1. internal energy of a gas.. KE of a gas... Difference between these two... 2. Is adiabatic process a quasi-static one? Validate ...

A metallic surface has a threshold wavelength of 600 nm. It is irradiated by a monochromatic light of wavelength 400 nm. Then, (A)no photoelectrons are emitted (B)photoelectrons with speed varying from 0 to V max are emitted ...

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hey can ny1 give me d key 2 isat model question paper plzzz.. here d link to isat sample QP http://www.iist.ac.in/IIST/compRepository/mediagallery/isat2010/syllabus_and_questions.pdf ...

Statement I: Any process in which both the pressure and volume change, takes place only at constant temperature. Statement I I: Work done in thermo- dynamic process is path dependent. (A)Statement I is false, Statement II is ...

A thin rod of length 2R and mass m is standing(vertically) on a perfectly smooth floor. the state of equilibrium in which the rod is at res is unstable, and the rod falls. find the trajectories that the various points of the ...

can anyone pls solve this for me?a rain drop falls from rest in an atmosphere saturated with water vapour. as it falls, water vapour condenses on the drop at the rate of mass mu per second. if initial mass of drop is m naught ...