Total Number of Question/s - 6437

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  • 1. Physical World - Quiz


    SAMPLE QUESTIONS


    1. Radio and television are based on_____________.
    a) production
    b) Production , propagation and reception of electromagnetic waves.
    c) frequency
    d) none of these

    2. Classical Physics does not include subjects like
    a) Mechanics
    b) Heat
    c) Elementary particles
    d) Sound

  • 2. Units and Measurements - Quiz


    SAMPLE QUESTIONS


    1. Given : force =α/(density+ β3) . What are the dimensions of α, β?
    a) ML-2T-2, ML-1/3
    b) M2L4T-2, M1/3L-1
    c) M2L-2T-2, M1/3L-1
    d) M2L-2T-2, ML-3

    2. Assuming that the mass m of the largest stone that can be moved by a flowing river depends upon the velocity v of water, its density ρ and acceleration due to gravity g, them m is directly proportional to
    a) ν4
    b) ν6
    c) ν5
    d) ν

  • 3. Motion in a Straight Line - Quiz


    SAMPLE QUESTIONS


    1. The displacement s of a particle is proportional to the first power of time t, i.e., s ∝ t; then the acceleration of the particle is
    a) Infinite
    b) Zero
    c) A small finite value
    d) A large finite value

    2. The displacement x of a particle moving in one dimension under the action of a constant force is related to time t by the equation t = $\sqrt{x} + 3$, where x is in metres and t is in seconds. Find the displacement of the particle when its velocity is zero
    a) Zero
    b) 12 m
    c) 6 m
    d) 18 m

  • 4. Motion in a Plane - Quiz


    SAMPLE QUESTIONS


    1. A motor car is moving with a speed of 20 ms-1 on a circular track of radius 100 m. If its speed is increasing at the rate of 3 ms-1, its resultant acceleration is
    a) 3 ms-1
    b) 5 ms-2
    c) 3.5 ms-2
    d) 4 ms-2

    2. Wind is blowing West of East along twp parallel tracks. Two trains moving with same speed in opposite directions have the steam track of one double than other. The speed of each train is
    a) equal to that of wind
    b) double that of wind
    c) three times that of wind
    d) half that of wind

  • 5. Laws of Motion - Quiz


    SAMPLE QUESTIONS


    1. Three forces acting on a body are shown in (figure). To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed along OX is
     

    a) 0.5 N
    b) 1.5 N
    c) √3 /4 N
    d) √3 N

    2. A block of metal weighing 2kg is resting on a frictionless plane. It is struck by a jet releasing water at rate of 1kgs-1 and at a speed of 5ms-1 . The initial acceleration of the block is

    a) $\frac{5}{3}ms^{-2}$
    b) $\frac{25}{4}ms^{-2}$
    c) $\frac{25}{6}ms^{-2}$
    d) $\frac{5}{2}ms^{-2}$

  • 6. Work, Energy and Power - Quiz


    SAMPLE QUESTIONS


    1. A particle of mass m slides along a curved-flat-curved track. The curved portions of the track are smooth. If the particle is released at the top of one of the curved positions, the particle comes to rest at flat portion of length l and of μ = μkinetic after covering a distance of

    a) $\frac{l}{3\mu}$
    b) $\frac{H}{2\mu_{kinetic}}$
    c) $\frac{l}{6}$
    d) $\frac{H}{\mu_{kinetic}}$

    2. In a tug of war, both the teams A and B remain in equilibrium , then
    a) Work done by team A is positive
    b) Work done by team B is positive
    c) Work done by botth the teams is negative
    d) Work done by the teams is zero

  • 7. System of Particles and Rotational Motion - Quiz


    SAMPLE QUESTIONS


    1. A coin sphere is rolling on a rotating turn table just slips if it is placed at a distance of 8 cm from the centre. If angular velocity of the turn table is doubled, it will just slip at a distance of
    a) 1 cm
    b) 2 cm
    c) 4 cm
    d) 8 cm

    2. A wheel is subjected to uniform angular acceleration about its axis. Initially, its angular velocity is zero. In the first 2 sec, it rotates through an angle θ1, in the next 2 sec, it rotates through an angle θ2. The ratio of θ21 is
    a) 1
    b) 2
    c) 3
    d) 5

  • 8. Gravitation - Quiz


    SAMPLE QUESTIONS


    1. A solid sphere of uniform density and mass M has radius 4 m. Its centre is at the origin of the coordinate system. Two spheres of radii 1 m are taken their centres are at P(0,-2,0) and Q(0,2,0), respectively. This leaves two spherical cavities . What is the gravitational field at the origin of the coordinate axes?

    a) $\frac{31GM}{1024}$
    b) $\frac{Gm}{1024}$
    c) 31 GM
    d) zero

    2. The value of g at a particular point is 10 m s-2. Suppose the earth shrinks uniformly to half of its present size without losing any mass. The value of g at the same point (assuming that the distance of the point from the centre of the earth does not change) will now be
    a) 5 ms-2
    b) 10 ms-2
    c) 3 ms-2
    d) 20 ms-2

  • 9. Mechanical Properties of Solids - Quiz


    SAMPLE QUESTIONS


    1. Two blocks of masses 1kg and 2kg are connected by a metal wire going over a smooth pulley as shown in the figure. The breaking stress of the metal is (40/3π) x 106 N/m2 . If g = 10m/s2, then what should be the minimum radius of the wire used if it is not to break?

    a) 0.5mm
    b) 1mm
    c) 1.5 mm
    d) 2mm

    2. If the work done by stretching a wire by 1mm is 2J, the work necessary for stretching another wire of the same material but with the radius of cross section and half the length by 1mm is
    a) $\frac{1}{4}J$
    b) 4J
    c) 8J
    d) 16J

  • 10. Mechanical Properties of Fluids - Quiz


    SAMPLE QUESTIONS


    1. A sphere of relative density σ and diamter D has concentric cavity of diameter d. When the sphere just floats on water in a tank, the ratio of D/d is ( σ-1 /σ)1/3.
    a) True
    b) False

    2. The lower end of a capillary tube is dipped in water. Water rises to a height of 8 cm. The tube is then broken at a height of 6 cm. The height of water column and angle of contact will be
    a) 6cm, sun-1(3/4)
    b) 6 cm, cos-1(3/4)
    c) 4 cm, sin-1(1/2)
    d) 4 cm, cos-1(1/2)

  • 11. Thermal Properties of Matter - Quiz


    SAMPLE QUESTIONS


    1. In similar calorimeters, equal volumes of water and alcohols , when poured , take 100 and 74s, respectively, to cool from 500C to 400C. If the thermal capacity of each calorimeter is numericall equal to volume of either liquid, the calculate the speciifc heat capacity of alcohol (given : the relative density of alcohol as 0.8 and specific heat capacity of water as 1 cal/g/0C).
    a) 0.8 cal/g0C
    b) 0.6 cal/g0C
    c) 0.9 cal/g0C
    d) 1 cal/g0C

    2. Three rods of same dimensions are arranged as shown in Fig. They have thermal conductivities K1, K2 and K3. The point P and Q are maintained at different temperatures for the heat to flow at the same rate along PRQ and PQ. Which of the following options is correct?

    a) $K_{3}$ = $\frac{1}{2}\left (K_{1} + K_{2} \right )$
    b) $K_{3}$ = $K_{1} + K_{2}$
    c) $K_{3}$ = $\frac{k_{1}K_{2}}{K_{1} + K_{2}}$
    d) $K_{3}$ = $2\left (K_{1} + K_{2} \right )$

  • 12. Thermodynamics - Quiz


    SAMPLE QUESTIONS


    1. A monoatomic gas at pressure P1 and V! is compressed adiabatically to 1/8th of its original volume. What is the final pressure of the gas?
    a) 64 p1
    b) P1
    c) 16P1
    d) 32P1

    2. A thermodynamic system is taken through the cycle ABCD as shown. Heat rejected by the gas during the cycle is:
     

    a) 2PV
    b) 4PV
    c) PV/2
    d) PV

  • 13. Kinetic Theory - Quiz


    SAMPLE QUESTIONS


    1. A thermally insulated constainer is divided into two parts by a screen . In one part the pressure and temperature are P and T for an ideal gas filled. In the second part it is vacuum. If now a small hole is created in the screen, then the temperature of the gas will
    a) decrease
    b) increase
    c) remain same
    d) none of these

    2. The ratio of most propable speed, average speed and rms speed pf gas molecule is __________
    a) cmp : cav : Crms = √2 : √(8/π) : √3
    b) cmp : cav : Crms = √2 : √(8/π) : √4
    c) Both a and b
    d) none of these

  • 14. Oscillations - Quiz


    SAMPLE QUESTIONS


    1. If a spring of stiffness `k` is cut into two parts `A` and `B` of length lA : lB = 2:3 , then the stiffness of spring ;A; is given by
    a) 5k/2
    b) 3k/5
    c) 2k/5
    d) k

    2. A body is performing simple harmonic motion with amplitude a and time period T. Variation of its acceleration (f) with time (t) is shown in Fig. If at time t, velocity of the bosy is v, which of the following graphs is correct?

    a)
    b)
    c)
    d)

  • 15. Waves - Quiz


    SAMPLE QUESTIONS


    1. Two strings A and B, made of same material, are stretched by same tension. The radius of string A is double of the radius B.A transverse wave travels on A with speed vA and on B with speed vB. The ratio vA/VB is
    a) 1/2
    b) 2
    c) 1/4
    d) 4

    2. Two canoes are 10m apart on a lake. Each bobs up and down with a period of 4.0 s . When the canoe is at its highest point, the other canoe is at its lowest point. Both canoes are always within a single cycle of the waves. The speed of wave is
    a) 2.5 m/s
    b) 5 m/s
    c) 40 m/s
    d) 4 m/s

  • 16. Scalar and Vector - Quiz


    SAMPLE QUESTIONS


    1. Two vectors $\vec{a}$ and $\vec{b}$ are at an angle of $60^{0}$ with each other . Their resultant makes an angle of $45^{0}$ with $\vec{a}$. If $|\vec{b}|$ = 2 units, then $|\vec{a}|$ is
    a) $\sqrt{3}$
    b) $\sqrt{3}$ - 1
    c) $\sqrt{3}$ + 1
    d) $\sqrt{3}$/2

    2. If the angle between the vectors $\vec{a}$ and $\vec{b}$ is an acute angle, then the difference $\vec{a} - \vec{b}$ is
    a) The major diagonal of the parallelogram
    b) The minor diagonal of the parallelogram
    c) Any of the above
    d) None of the above

  • 17. Conservation of momentum and Collision - Quiz


    SAMPLE QUESTIONS


    1. In an inelastic collision
    a) momentum is conserved but kinetic energy is not conserved
    b) momentum is not conserved but kinetic energy is conserved
    c) neither momentum nor kinetic energy is conserved
    d) both momentum and kinetic energy are conserved

    2. A ball of mass m moving with velocity v strikes the bob of a pendulum at rest. The mass of the bob is also m. If the collision is perfectly inelastic, the height to which the bob will rise will be
    a) $\frac{v^{2}}{8g}$
    b) $\frac{v^{2}}{2g}$
    c) $\frac{2v^{2}}{g}$
    d) $\frac{v^{2}}{g}$

  • 18. Rotational Dynamics - Quiz


    SAMPLE QUESTIONS


    1. Two uniform boards, tied together with the help of a string, are balanced on a surface as shown in figure

    The coefficient of static friction between boards and surface is 0.5. The minimum value of θ for, which this type of arrangement is possible is
    a) 300
    b) 450
    c) 370
    d) It is not possible to have this type of balanced arrangement

    2. A cylinder having moment of inertia, which is free to rotate about its axis, receives an angular impulse to J kg m2/s initially, followed by similar impulse after every 4s. What is the angular speed of the cylindder 30s after the initial impulse?
    a) $\frac{7J}{I}$
    b) $\frac{8J}{I}$
    c) $\frac{J}{I}$
    d) zero

  • 19. Fluid Dynamics - Quiz


    SAMPLE QUESTIONS


    1. Equal volume of two immiscible liquids of densities ρ and 2ρ are filled in a vessel as shown in the figure. Two small holes are punched at depths h/2 and 3h/2 from the surface of lighter liquid. If v1 and v2 are the velocities of efflux at these two holes, then v1/v2 is

    a) $\frac{1}{2\sqrt{2}}$
    b) $\frac{1}{2}$
    c) $\frac{1}{4}$
    d) $\frac{1}{\sqrt{2}}$

    2. A small ball of density ρ is immersed in a liquid of density σ (>ρ) to a depth h and released. The height above the surface of water up to which the ball will jump is
    a) $\left ( \frac{\sigma }{\rho }-1 \right )h$
    b) $\left ( \frac{\rho }{\sigma }-1 \right )h$
    c) $\left ( \frac{\rho }{\sigma }+1 \right )h$
    d) $\left ( \frac{\sigma }{\rho }+1 \right )h$