Recently Active Physics Questions

a certain mirror placed at the origin has i^ as the normal vector to its reflecting surface. the mirror begins to translate with a velocity i^ +j^ +k^ at t=0, at the same time an object which was initially at i^+j^ starts mov ...

statement 1 :- in aregion of time varying magnetic field two charges of same magnitude moves from A to B in clockwise and anticlockwise manner . work done in clockwise path is equal to work done in anticlockwise path. *Image* ...

What is the average velocity of a molecule of a gas??? ...

*Image* in the given circuit each cell has a internal resistance of 1 ohms. find out the potential difference across the 2 V cell ...

*Image* Solution : current in R4 and R3 is (6-5)/5=1/5A VCD=VCA=VCB (no current is flowing through R1) V=VCB=E2+iR2=2 + 2/5=12/5A E=(1/2)CV2 ...

Q An electric dipole is kept on the axis of a uniformly charged ring at a distance R/√2 from the centre of the ring . The direction of the dipole moment is along the axis . The dipole moment is P, charge of the ring is Q an ...

Q A man of mass 80 Kg pushes a box 20 Kg horizontally . the man moves the box with a constant acceleration of 2 m/s2 but his foot does not slip on the ground. there is no friction btwn the box and the ground , whereas there i ...

a light of wavelength λ is incident on a metal sheet of work function 2ev. The wavelength I varies with time as I=3000+40t., where I is in A and t is in sec.The power incident on the metal surface is 100W. the signal is swit ...

when a charged body is brought near a neutral conducting body, the induced charge that appears on the nearer surface of the conducting body is always equal and opposite to the charge that has been brought in ...

can anyone post the correct graph of resistivity vs temp. of an electrolyte ..... ...

*Image* A weightless rod with a length `l` is rigidly attached to a weightless pulley with radius `r`. The end of the rod carries a mass `m` .A string to whose free end a mass `M` is fastened is passed over the pulley . in wh ...

Figure represent four option of a current carrying coil in a magnetic field directed towards right. *Image* *Image* a) I>II>III>IV b) I>III>II>IV c) II>III>I>IV d) I>III>IV>II Plz.... Gudie ...

1. Viscosity of fluids decreases with rise in temperature , but of gases increases with increase in temperature ... PLEASE explain why is it so ? 2. We know that if the impurity is completely soluble then on mixing it in the ...

Q in the circuit diagram each resistor is of resistance 5 ohm . the points A and B r connected to terminals of a cell of emf 9 volt and internal resistance 2/3 ohm. *Image* find heat produced in cell and the current in resist ...

SORRY, PUT IT IN THE WRONG SLOT. ...

A circular ring of mass M and radius a is placed in a gravity free space. A small particle of mass m is placed on the axis of the ring at a distance √3a from the centre of the ring is released from rest. the velocity of the ...

Please visit the following links to see CBSE BOARD 2009 solutions for Chemistry code 56/1 and Physics code 55/3 papers. http://topperlearning.com/userfiles/XII_chem_board_2009_solutions_.pdf http://topperlearning.com/userfile ...

WHat is the moment of inertia of a cuboid over 1.any particular edge 2.any body diagonal 3.COM no need for derivations,the expressions will do ...

According to Newton's Third Law "Every action has an equal and opposite reaction". The question is: A block of mass m is kept on a horizontal table. What is the "reaction" to the force mg experienced by the block? Options are ...

two incident monochromatic waves whose wavelength differ by a small amt dλ are separated angularly atθ and θ+dθ wrt the incidence ray .the dispersive power is given by (a)dθ/dλ (b)dθ/θ (c)dλ/λ (d)λ(dλ/dθ) ...

a particle is approaching with a velocity of 5i^+3j^ and it returns after colliding with a velocity of -3i^+4j^ find the coefficient of restitution ...

*Image* and *Image* ...

1.) a hydrogen atom in an excited state emits a photon which has the longest wavelength of the paschen series. further emissions from the atom cannot include the a) longest wavelength of the lyman series b) 2nd-longest wavele ...

a block of mass m is placed on a smooth wedge of inclination theta The whole system is accelerated horizontally so that the block does not slip on the wedge The force exerted by the wedge on the block has a manitude is the an ...

*Image* none of my answers seem to match with the options given :( ...

can anyone post the graph of resistance vs temp. of a semiconductor ...

there is ball file with water.then centre of mass in centre of sphere we make hole in it . then does it centre mass must change as water come out at last centre of mass is in centre again how? ...

A hollow cylinder of mass m1, filled with water of mass m2, is pure rolling on a sufficiently rough surface with a speed v. What is the total kinetic energy possessed by the cylinder+water system? Options: (a) 0.5*(m1+m2)*v2 ...

the rates of cooling of two different liquids put in exactly similar calorimeters and kept in identical suuroundings are the same if a)The masses of the liquids are equalb)equal masses of the liquids at same teperatures are t ...

the circular boundary of concave mirror subtends a cone of half angle θ at its centre of curvature .The minimum value of θ for which ray incident on this mirror parallel to the principal axis suffers reflection more than on ...