Related InterviewSolutions

• Water is filled to height `h` in a fixed vertical cylinder placed on horizontal surface. At time `t = 0` a small hole a drilled at a height `h//4` from bottom of cylinder as shown. The cross section area of hole is a and the cross-section area of cylinder is `A` such that `A gtgt a`. Let the value of horizontal distance of point where the4 water fall on horizontal surface from bottom of cylinder be `x` as shown. Then from time `t = 0` till water comes out of hole, pick the correct statement:A. increasesB. decreasesC. remains constantD. increases and then decreases
• An ideal fluid flows through a pipe of circular cross-section made of two sections with diameters `2.5 cm` and `3.75 cm`. The ratio of the velocities in the two pipes isA. `9 : 4`B. `3 : 2`C. `3 : 2`D. `2 : 3`
• A sealed tank containing a liquid of density `rho` moves with horizontal acceleration a as shown in the figure. The difference in pressure between two points `A` and `B` will be A. `h rho g`B. `l rho a`C. `h rho g - rho al`D. `h rho g + rho al`
• A body of density `rho` is dropped from rest from height h (from the surface of water) into a lake of density of water `sigma(sigmagt rho)`. Neglecting all disspative effects, the acceleration of body while it is in the take isA. `g ((sigma)/(rho)-1)` upwardsB. `g((sigma)/(rho)-1)` downwardsC. `g ((sigma)/(rho))` upwardsD. `g((sigma)/(rho))` downwards
• A balloon is at a height of 40 m and is ascending with a velocity of `10 ms^(-1)`. A bag of 5 kg weight is dropped from it, when will the bag reach surface of earth ? `(g = 10 m//s^(2))`A. 2 secB. 4 secC. 6 secD. `2 sqrt(2) sec`
• The distance of an object from a spherical mirror is equal to the focal length of the mirror. Then the image.A. must be at infinityB. may be at infinityC. may be at the focusD. none
• A beam of monochromatic light is incident at `i= 50^(@)` on one face of an equilateral prism, the angle of emergence is `40^(@)`, then the angle of minimum deviation is :A. `30^(@)`B. `lt 30^(@)`C. `le 30^(@)`D. `ge 30^(@)`
• A coverging beam of light is incident on the concave mirror. Then the reflected light :A. forms real imageB. it may form virtual imageC. forms virtual imageD. none of these
• Three identical circular coils A, B and C are placed coaxial (with planes parallel to each other) The coils A and C equal currents in opposite direction as shown. The coils B and C are fixed in positions and the coil A is moved towards B wiyj uniform motion then - A. there is no induced current in BB. current produced by A and C in B will be equal and opposite, therefore net current in B is zeroC. there is an induced current in B which is in anticlockwise directionD. there is an induced current in B which is in clockwise direction
• Three point masses A,B,C each of mass m are moving on the same circular path and are always equidistant from each other. The radius of circular is R and the speed of each mass is same and equal to V. The only force acting on each mass is the graviational force because of the other two masses. Choose the correct statementA. power of gravitational force by A on B is non-zeroB. power of the gravitational force by A on B is zeroC. power of net force on A in the frame of B is zeroD. the ratio of magnitude of relative velocity of A with respect B and A with respect to C is `1 : 1`