Related InterviewSolutions

• A body of mass m is released from a height h on a smooth inclined plane that is shown in the figure. The following can be true about the velocity of the block knowing that the wedge is fixed. .A. Speed is maximum when resultant force on the block is zero.B. Speed is maximum when it compresses the spring by some amountC. Speed is maximum when the spring comes back to natural positionD. none of these
• On an inclined plane making an angle `theta` with the horizontal plane, a solid cylinder of mass `m_(1)` is connected to a block of mass `m_(2)` by means of a light chord which is parallel to incline plane . The coefficient of friction between block and incline and between cylinder and incline is equal to `mu` . the system is held at rest & then released . If cylinder & block move together and cylinder perform pure rolling & tension in string is non zero then Minimum value of `mu` for which cylinder will not slip ? A. `((m_(1)+m_(2))tantheta)/(m_(1)+2m_2)`B. `(2)/(3)tantheta`C. `((m_(1)+m_(2))tantheta)/((3)/(2)m_(1)+2m_(2))`D. `(tantheta)/(3)`
• On an inclined plane making an angle `theta` with the horizontal plane, a solid cylinder of mass `m_(1)` is connected to a block of mass `m_(2)` by means of a light chord which is parallel to incline plane . The coefficient of friction between block and incline and between cylinder and incline is equal to `mu` . the system is held at rest & then released . If cylinder & block move together and cylinder perform pure rolling & tension in string is non zero then Acceleration of block will be : A. `((m_(1)m_(2))g sin theta-mum_(2)gcostheta)/((3)/(2)m_(1)+m_(2))`B. `((m_(1)m_(2))g sin theta-mum_(2)gcostheta)/((3)/(2)m_(1)+m_(2))`C. `((m_(1)m_(2))g sin theta-mum_(2)gcostheta)/((3)/(2)m_(1)+2m_(2))`D. `((m_(1)m_(2))g sin theta-mum_(2)gcostheta)/((5)/(2)m_(1)+m_(2))`
• A uniform cylinder of mass `m` lies on a fixed plane inclined at a angle `theta` with the horizontal. A light string is tied to the cylinder at the rightmost point, and a mass `m` hangs from the string as shown. Assume that the coefficient of friction between the cylinder and the incline plane is sufficiently large to prevent slipping. for the cylinder to remain static the value of `m` is A. `("M" cos theta)/(1+sintheta)`B. `("M" sin theta)/(1+sintheta)`C. `("M" cos theta)/(1-sintheta)`D. `("M" sin theta)/(1-sintheta)`
• The Fig. shows a string of equally placed beads of mass `m`, separated by distance `d`. The beads are free to slide without friction on a thin wire. A constant force F act on the first bead initially at rest till it makes collision with the second bead. The second bead then collides with the third and so on. Supposed that all collisions are elastic, A. Speed of first bead immediately before and immediately after its collision with the second bead is `sqrt((2Fd)/(m))` and zero respectively.B. Speed of first bead immediately before and immediately after its collision with the second bead is `sqrt((2Fd)/(m))and(1)/(2)sqrt((2Fd)/(m))` respectively.C. Speed of second bead immediately after its collision with the third bead is zero.D. The average speed of the first bead during its motion is `(1)/(2)sqrt((2Fd)/(m)).`
• Which of the following compound gives yellowish white turbidity with dil. `H_(2)SO_(4)`?A. `Na_(2)SO_(3)`B. `NaNO_(3)`C. `Na_(2)S_(2)O_(3)`D. `Na_(2)S`
• Which of following shows highest rate of decarboxylation in presence of soda lime :A. `underset(F)underset(|)(C)H_(2)-COOH`B. `underset(Cl)underset(|)CH_(2)-overset(O)overset(||)C-OH`C. `underset(Br)underset(|)CH_(2)-overset(O)overset(||)C-OH`D. `underset("I ")underset(|)CH_(2)-overset(O)overset(||)C-OH`
• `Aoverset("KCN")toBoverset(H_(3)O+)underset(NH_(3)//Delta)toCoverset(Br_(2))underset(KOH)toCH_(3)-CH_(2)-NH_(2)` reactant A in given reaction sequence?A. `CH_(3)-CH_(2)-CH_(2)-Cl`B. `CH_(3)-CH_(2)-Cl`C. `CH_(3)-Cl`D. `CH_(3)-underset(CH_(3))underset(|)CH-Cl`
• Photons are incident from vacuum on a transparent material with a refractive index n for a given wavelength. Determine the momentum of the incident photon, if its wavelength in the material is equal to `lambda`.A. `nh//lambda`B. `h//lambda`C. `h/(nlambda)`D. `h//lambda(n+1)`
• Assertion : Photoelectric effect supports the quantum nature of light. Reason : Photoelectric emission is instantaneous.A. there is a minimum frequency of light below which no photoelectrons are emitted.B. the maximum K.E. of photoelectrons depends only on the frequency of light and not on its intensity.C. even when the metal surface is faintly illuminated by light of the approximate wavelength, the photoelectrons leave the surface immediately.D. electric charge of photoelectrons is quantized.