Recently Active Physics Questions

*Image* ...

pulley's radius is 20cm and M.I is 0.2kgm2 .the string is attached to a block. spring constant is 50 N/m .mass of block=1kg.The system is released from rest with spring at its natural length .Find speed of the block when it h ...

Why can you warm your hands by blowing gently, and cool your hands by blowing hard? ...

*Image* ...

STATEMENT--1 : The induced electric field in a time varying magnetic field is non-conservative. because STATEMENT--2: The indused emf across a closed path in a time varying magnetic field is non-zero. ...

STATEMENT --1: A positively chsrged sphere and a negative charged sphere are kept at finite distance. The total electrostatic potential energy of system must be negative. because STATEMENT-- 2 : Potential energy between two l ...

If a force F→ = ((3i + 4j + 5k ) Newtons is acting on a particle moving on a circle of radius 2m with a speed increasing at the rate of 2ms-2. All points on the circle satisfy the equation 3x+ 4y + 5z = 0. The power of the ...

A body executes simple harmonic motion under the action of a force F1 with a time period 4/5s. If the force is changed to F2 it executes S.H.M with time period 3/5 s. If both the forces F1 and F2 act simultaneously in the sam ...

A uniform heavy rod of weight W, cross sectional area A, and length L, is hanging from a fixed support . young's modulus of the rod is Y . Find the elongation of the core. .... .... 1)What will be the answer 2)wont we conside ...

PLEASE EXPLAIN TO ME THE STEPS THAT I'M SHOWING HERE : *Image* This is a popular Irodov problem. (FLUID IS FILLED UPTO THE BRIM ). I am putting down a few lines of what i can't understand here ..... if you have good will....p ...

*Image* a. 6 kg b. 4 kg c. 8 kg d. 10 kg ans is c ...

Q1 A open tank having non viscous liquid to height 5m is palced over gorund.A heavy spherical ball falls from height 40m over the ground in tank.Find height to which ball will go back.Collison b/w ball and bottom of tank is e ...

1)A:Negative work is done on water vapor in air molecules that ocndense on outside of glass of cold water R:Temperature of condensing molecules is getting decreased due to condensation 2)A:A flywheel is a disc shaped body of ...

1) *Image* The figure shows an inductor and Resistance connecdted in series across a battery of EMF=V. Choose the correct options. At time t=0, i) Potential drop across Inductor is 0. ii) Potential drop across Inductor is V. ...

When a hydrogen atom emits a photon during the transition n = 5 to n = 1, its recoil speed is approximately (a) 4 m/s (b) 800 m/s (c) 3 mm/s (d) 0.1 mm/s ...

5) angular displacement of the rod shown in figure below is defined as θ=(4∩/25)t2 where θ is in radian and time 't' in second . The collar B slides along the rod in such a way that its distance from O is r=12t2 where r i ...

*Image* ans is d ...

If the wavelength of incident light on a)concave mirror and b) convex lens is increased, how will the focal length of each of these change.Give reason. ...

*Image* ...

a rectangular container of height 3m,width 3m each is filled with ideal liquid upto 3/2m.Container is pulled horz with acc a=g.The gauge pressure at point A as shown in fig is P1. if container is completely filled with liq an ...

A rat is at a position R and a snake is at S in the field as shown below. The moment the rat starts running uniformly in a direction making an angle of 20 degree with the line RS, the snake moves to catch its prey. If the sna ...

St 1 A positively charged sphere and negatively charged sphere r kept at a finite distance The total electrostatic PE of the system must be negative St 2 PE b/w 2 like charge particle is +ve and 2 unlikely charged particles i ...

ASSERTION The induced electric field in a time varying magnetic field is non conservative REASON The induced Emf across a closed path in a time varying B field is non zero ...

What is the angle made by the displacement vector of the point of a wheel (of radius R) initially in contact with the ground, with the x-axis, when the wheel rolls forward 3/4th of a revolution? ans is tan inverse 7/33.... i ...

*Image* for what height h of water in vertical cylinder will the piston be in equilibrium? a)r b)2r c)r/2 d)r/3 ...

Q) Charges 2q, 2q, -4q are placed at the vertices of an equilateral triangle of side length a. Find the Dipole moment of the system. 1st tell me - where is the concept of dipoles coming? HCV writes that charges that are equal ...

*Image* ...

*Image* two stones... bigger one of mass' M' n smaller one of mass 'm' is dropped from a height 'h' ... afetr coming in contact with d ground d stones bounce back.. the cofficeint of restitution between d two stones 'E' is eq ...

*Image* ...

*Image* ...