Recently Active Physics Questions

a charged sphere A of radius r is placed concentrically inside a conducting spherical shell(B) of radius R (R>r). A charge Q is given to A and then A and B are joined by a metal wire the charge flowing from A to B will be ...

detrmine d max wavelngth that wud b absored by hydrogen like atom z=3 consider most ordinary condition ...

two bubbles of radius r1 and r2 coalses to form a enw bubble of radius R .....under isothrmal conditions thne wat s d value of R ?? ...

ie To find the ratio of Cp to Cv... If n1 moles of a gas having γ1, and n2 moles of a gas having γ2 are mixed , then what is the value of γmix The formulae given was => n1+n2 = n1 + n2 --------------- ------------- ---- ...

Can kinetic energy of a system be increased without applying any external force on the system ?? ...

A book is lifted from the floor and is kept in an almirah.One person says that the potential energy of the book is increased by 20J & the other says it is increased by 30 J . Is one of them necessarily wrong ? ...

a boat moves wid speed 5km/h wrt water in starigh river flwoin wid a speed 3km/h n havin width 1km : hw long will d boat take to make a round trip across d river ...

*Image* Consider the situation shown in the figure.Both the pulleys and the string are light and all the surfaces are smooth. (a)Find the accn of 1kg block. (b)Find the tension in the string. ...

Is work energy theorem valid in noninertial frames ?? ...

Pls state with reason whether work done is pos,neg. or 0 in each case. 2 teams r playing tug-of war.. a. work done by the winning team on the losing team. b. work done by both losing team on the winnig team c. work done by th ...

*Image* (B = b (-)decay,a= alpha decay) A and D are related as: a) Isotopes b) same nuclei c) isoelectronic d) isomers I have confusin between a) & c) ...

Hey does anyone have any quick links for some material in experimental physics? ...

*Image* I GOT ANSWER AS 3 PLS POINT OUT THE MISTAKE IN MY SOLUTION: mA(9)=mBvB (Since collision is elastic) Thus, vB=9/2 ms-1 Collision between B and C is inelastic so 2mvB=3mvcommon So vcommon=3 ms-1 But ans given is 4 ms-1 ...

well many of you must be knowing about ICR - instantaneous centre of rotation . but i here give an example of a very common situation in rotational mechanics .Interpret it carefully . prolem 1 (starter) Consider a purely roll ...

a particle havin +ve chrge is releasd frm rest in eltric field and moves under d influence of both d eltric field n gravity .wich of d follwon qunatites conncted wid d chrged particle continously increases wid tym Eltric pote ...

A working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found between P and Q. By connecting the common (negative) terminal of the multimeter to R and the other (positive) ter ...

If Youngs double slit experiment uses monochromatic source,then shape of interference fringes on screen is straight line,whereas if Youngs double hole experiment is used,the sahape is hyperbola.WHY?? ...

A BALL STRIKES A WALL(ASSUME PERFECTLY ELASTIC COLLISION).THE BALL BOUNCES BACK WITH SAME VELOCITY(SAY V). SO,WE SEE THAT KINETIC ENERGY REMAINS CONSERVED BUT THE MOMENTUM OF BALL CHANGES BY 2mV. HOW CAN WE HAVE THAT MOMENTUM ...

Statement – I: Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion. and Statement – II For heavy nuclei, binding energy per nucleon increases with increasing Z while for light nuclei it dec ...

Temperature of a body comes down to 40°C from 50°C in 5 min...in how much time temperature will come down to 30°C...temp of surroundings 20°C.. widout calculator ...

*Image* Calculate the acceleration of either blocks and the tension in the string shown in the figure.The pulley and the string are light and all surfaces are smooth. ...

*Image* Two unequal masses of 1kg and 2kg are connected by a strng going over a clampe light smooth pulley as shown in figure.The system is released from rest .The larger mass is stopped for a moment 1s after the system is se ...

2 heavy circular rollers of diameters D and d , respectively , rest on a rough horizontal plane as shown in the figure. The larger roller has a string wound around it to which a horizontal force P can be applied as shown. Ass ...

a large bubble rises frm bottom of a lake to itz surface itz radius is doubled d atm pressure is equal to that of colmn of water of height h d depht of d lake is ?? ...

a closed cubical box is completly filled with water n accelerated horizontly towards right with acc a .d resultant normal force by water on the top of box 1 passes tru centr of top 2 pass thrun right of centre 3passes thru le ...

Asser:if the t1/2 of a sample is 40 days then the sample will decay 25% in 20 days reason:N=(N0)n where n=time elapsed/t1/2 ...

d depletion layer in pn junction is caused by drift of holes drift of eltrons diffusion of charge carriers migration of impurities ...

a force -f(k^) acts onthe originof coordinate system .torque abt the point (1,-1) ...

q to construct a barometer a tube of length 1 m is filled completely with mercury n is inverted in a mercury cup .the barometer reading on a particular day is 76 cm suppose a 1 m tube is filled with mercury up to 76 cm n then ...

1) A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement x is proportional to: (a) x2 (b) ex (c) x (d) logx ...