Recently Active Physics Questions

Q)At 0°c a body emits....... a) no radiation b)electromagnetic radiation of single wavelength c)electromagnetic radiation of all wavelengths that are emitted at room temperature d)electromagnetic radiation of fewer wavelengt ...

q a particle is projecte from horizontal plane to pass over two objects at height h n k n aslant distance d apart. wat s least possible speed of projection a)g(h+k+d) b)√[g(h+k+d)] c)h(g+k+d) d)√[h(g+k+d)] ...

two point charges are kept in space. they exert force on each other the magnitude and direction given by coulomb's law. now, if an infinitely large metallic plate of considerable thickness is placed between the charges, do th ...

a stone is dropped into a well 80m deep & impact of sound is heard after 4.25 s if g=10m/s2 d vel of sound in air is ...

a stone is dropped into a well 80m deep & impact of sound is heard after 4.25 s if g=10m/s2 d vel of sound in air is ...

Q a particle moves on acurved path with constant sped v .the acceleration of particle at x=0 is 2av2 .the path of particle is a)straight line b)parabolic c)eliptical d)none ...

A thin nonconducting ring of radius R has a linear charge density λ = λ0 cos φ, where λ0 is a constant, φ is the azimuthal angle. Find the magnitude of the electric field strength on the axis of the ring as a function of ...

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Hey can someone pls explain this concept in simple words to me? I came across a formula saying time to empty tank is A/a 2H/g Wher A is area of tank,a is area of hole, H is ht of liquid . Can someone pls explain how this form ...

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A particle of mass 1kg is projected at an angle of 30 degrees with horizontal with a velocity of 40m/s. The change in linear momentum of the particle after a tym t=1s is.... ...

*Image* I THINK BOTH SHOULD BE FALSE...........! ...

*Image* All surfaces are smooth and frictionless. Force constant of spring is k. What is maximum compression of spring when system is released from rest? ...

Q1.A boy is standing in an elevator accelerating upward throws a ball upward with a velocity v.The ball returns in his hands after a time t.The acceleration of the lift is - (a)2v-gt/t (b)2v+gt/t (c)v-gt/t (d)v+gt/t Q2.Two id ...

*Image* Wats is cap of this figure? ...

a full wave rectifier is fed with ac mains of frequncy 50Hz .wats d fundamental frequncy of d ripple in d output cenetr 50 25 100 75 ...

a half wave rectifier is being used to rectify an alternating voltage of freqncy 50Hz d no of pulses of rectified currt obtained in one sec is 50 25 100 200 fromula ke saath answer do ...

d delpletion region in pn junction diode , d acceptor ions in d p region and d donor ions in d n region give rise to a)potential frm n to p b|)potential frm p to n c)xtraction of amjority charge carrires frm each region d)inj ...

think of a vertical semicircle(Ω).a square plate is at rest at the lower most position at t=0 n moves as such θ=1.5t2 wer θ is in radian n tym is in sec .a small object p of mass 0.4 kg is temporarly fixed to the plate wid ...

kinetic energy of a particle along a circle of radius r depends on the distance covered as T=ks2 where k is a constant.find the force acting on a particle as a f:n of s a)2k/s*√(1+[s/r]2) b)2ks√(1+[r/s]2) c)2ks√(1+[r/s] ...

a space is filled up with a charge with volume density ρ=ρoe-αr3, where ρo n α are positive constants , r is the distance from the center of this system.find the magnitude of the electric field strength vector as a funct ...

1.2 straight long conductors of length l1&l3 and wire radii r1 & r2 are bent to form circular coils of turns n1 & n2 respectively.find the ratio of the magnetic induction at their respective centres. a.r2/r1 b.n1r2/n2r1 c.n2l ...

IS HCV EBOOK AVAILABLE ON INTERNET.IF YES,PLZ SEND THE LINKS IN THIS THREAD!!!!! THANX ...

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Two uniform solid spheres of equal radii R, but mass M and 4M have a centre seperation 6R.The two spheres are held fixed.A projectile of mass m is projected from the surface of the sphere of mass M directly towards the centre ...

Figure shows a comfortable electrostatic configuration, consisting of four conductors with charges ±Q situated so that the plusses are near the minuses. *Image* What happens if we join them via conducting wires as shown. Wil ...

A BOY WEIGHING 200 N CLIMBS UP TO THE TOP OF A VERTICAL LADDER 8.0 m HIGH.FIND THE WORK DONE BY LADDER ON THE BOY AS HE GOES UP. ...