CHAPTER -1 MEASUREMENT 1. The error in a measurement may occur due to:- a) Negligence (b) Inappropriate method c) Faulty apparatus (d) All of the above. 2. In any measurement the accurately know digits and the first doubtful digits are called. a) Measurement figures (b) Significant figures c) Doubtful figures (d) Accurately figures 3. The least count of meter rod is: - a) 0.01mm (b) 0.1mm c) 0.1 cm (d) Non of these 4. Each base quantity is considered a dimension denoted by a specific symbol written within. a) Small bracket (b) Square bracket c) Braces bracket (d) None of the above 5. The term √Tx1/m has dimension:- a) [LT] (b) [LT -2 ] c) [LT -1 ] (d) [L -1 T] 6. How many years in one Second? a) 3.1 x 10 -6 (b) 3.1 x 10 -7 c) 3 x 10 -8 (d) 3.1 x 10 -9 7. How many meters are there in one light year (speed of light = 3.0 x 10 8 m/s:- a) 9.5 x 10 14 cm (b) 9.5 x 10 12 m c) 9.5 x 10 16 m (d) none of the above 8. Diameter of an atom is measured in meters in the order of a) 10 -20 (b) 10 -10
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CHAPTER -1MEASUREMENT
1. The error in a measurement may occur due to:-
a) Negligence (b) Inappropriate methodc) Faulty apparatus (d) All of the above.
2. In any measurement the accurately know digits and the first doubtful digits are called.
4. Each base quantity is considered a dimension denoted by a specific symbol written within.
a) Small bracket (b) Square bracketc) Braces bracket (d) None of the above
5. The term √Tx1/m has dimension:-
a) [LT] (b) [LT-2] c) [LT-1] (d) [L-1T]
6. How many years in one Second?
a) 3.1 x 10-6 (b) 3.1 x 10-7 c) 3 x 10-8 (d) 3.1 x 10-9
7. How many meters are there in one light year (speed of light = 3.0 x 108 m/s:-
a) 9.5 x 1014 cm (b) 9.5 x 1012 mc) 9.5 x 1016 m (d) none of the above
8. Diameter of an atom is measured in meters in the order of
a) 10-20 (b) 10-10
c) 1010 (d) 1020
9. Time taken by light to cover a distance from moon to earth is :-
(a) 1 min 20 sec (b) 2 min 20 secc) 8 min 20 sec (d) 1 hr 20 sec
10. The uncertainty in the time period of a vibrating body in found by :-
a) Last count x number of vibrationsb) Last count / no of vibrationsc) Last count x 100%/( no: of vibrations)d) Last count – no of vibrations
11. Orange light emitted from krypton-86 atoms was used to define
a) Kilogramb) Meterc) Centimeterd) Second
12. The dimensions of | ½ at2 | are that of
a) Accelerationb) Velocity c) Length d) Time
13. Gega means
a) 109
b) 10-9
c) 10-12
d) 1012
14. An example of fundamental quantity is
a) Areab) Volumec) Lengthd) Velocity
15. The dimensions of frequency are
a) HZb) T-1
c) MLTd) LT-1
_____16. The dimensions of term √TX l/m is the same as the dimension of
a) Accelerationb) Velocityc) Forced) Non of these
17. How many days are there in one second?
a) 1.16 X 10-5
b) 1.16 X 10-8
c) 8.64 X104
d) 8.64 X10-4
18. The time taken by the light form sun to earth is
a) 1 min 20 sb) 6 min 20 s c) 8 min 20 sd) 7 min 20 s
19. The diameter of the earth is about
a) 6.4 X 106 mb) 6.4 X 1012 mc) 1.28 X 107 md) 1.28 X 1011 m
20. The time taken by light from moon to earth is 1 min 20S. the distance b/w earth and moon is a) 2.4 X 108 mb) 3.75 X 106 mc) 2.4 X 1010 md) 3.75 X 108 m
21. An example of fundamental unit is
a) Newtonb) Amperec) Jouled) Coulomb
22. There are __________ nano meter in one meter
a) 10-9
b) 109
c) 10-19
d) None of these
23. The diameter of radian is
a) [T-1]b) [ML-1]c) [LT]d) None of these
24. The specific temperature of a filament bulb is
a) 1800o C to 2000o Cb) 2000o C to 3000o Cc) 3000o C to 4000o Cd) None of these
25. According to the equation E=mc2 the energy obtained from 1KG isa) 9 X 1017 Jb) 9 X 1016 Jc) 3 X 108 Jd) 9 X 108 J
42. The torque produced by a central force about an axis is.
(a) Minimum (b) Zero (c) Maximum (d) Non of these
43. The magnitude of the torque exerted by the couple when force is F and arm of couple is l, is given by.
(a) T = F/l (b) T = Fl (c) T = l/F(d) T = √Fl
44. Torques producing anti-clockwise rotations are taken as
(a) Positive (b) Negative (c) Zero (d) All of the above
45. If the moment arm about the origin is zero then torque is:
(a) Infinite (b) Maximum (c) Minimum(d) Zero
46. When two equal and anti-parallel force act on a body and produce rotation, they are said to constitute a.
(a) Torque (b) Couple (c) Angular velocity(d) Moment of force
47. Three coplanar force acting on a body keep it in equilibrium they should therefore be.(a) Parallel (b) Non-concurrent (c) Concurrent(d) Non of the above
48. A metallic bob suspended by a string in the vertical plane will be in.
(a) Translational (b) Rotational equilibrium (c) Complete equilibrium (d) None of these
49. The first condition of equilibrium of a body is satisfied if.
(a) Its linear velocity is zero (b) Its linear Acceleration is zero(c) Its angle acceleration is zero (d) Non of the above
50. The cross product of r and F is called (a) Torque (b) Turning effect of force (c) Moment of force(d) All of the above.
9. The angle for which the max height is equal to the range of projectile is.
(a) 730 (b) 740 (c) 750 (d) 760
10. A ball is thrown horizontally from a point 45m high with velocity of 10m/s. the time to reach the ground is.
(a) 4.5 sec (b) .22 sec (c) 3.03 sec (d) 30.3 sec
11. The angle for which the range of projectile is equal to half of its max range is
(a) 150 (b) 300 (c) 450 (d) 600
12. The change in momentum of a body is equal to.
(a) Force (b) Impulse (c) Torque(d) N.O.T
13. A stone has a mass 40-gram. Its weight is.
(a) 392 N (b) 39200N (c) .392N (d) 3.92N
14. Body A of mass 2kg moving with 4m/s collides elastically with B which is at rest. If both are identical then the velocity of A after collision is.
(a) Zero m/s (b) 2 m/s (c) 4 m/s (d) 8 m/s
15. In the above case the velocity of B after collision is.
(a) Zero m/s (b) 2 m/s (c) 4 m/s (d) 8 m/s
16. The K.E of a body in terms of its momentum P is.
(a) P2/2m (b) 2m/p2 (c) 2p2/m (d) 2pm
17. A very heavy particle moving with 100 m/s collides elastically with a very light body at rest. The velocity of light body after collision is.
(a) 0 m/s (b) 100 m/s (c) 200 m/s (d) N.O.T
18. The speed of a 4 kg body with momentum 16 kg m/s is
(a) 4 m/s (b) 16 m/s (c) 64 m/s (d) .25 m/s
19. If the momentum of a body decreases by 20% the % age decrease in K.E is
(a) 36 (b) 40 (c) 30 (d) 44
20. The velocity of a projectile at maximum height is
(a) Vi sinθ (b) Vi cos θ (c) Maximum (d) Zero
21. The time for maximum height of projectile is given by.
(a) vi sinθ/g (b) 2 vi sin θ/g (c) vi sin θ/g(d) vi sin2 θ/g
22. Horizontal range of projectile is Vi2/g sin2θ. for what value of 2θ range is max.
(a) 900 (b) 450 (c) 00 (d) N.T.O
23. Body A of mass 2 kg moving with 4m/s collides elastically with B which is at rest. If both are identical then the velocity of B after collision is then the total momentum after collision is
(a) 8kg m/s(b) 16 kg m/s(c) 4 kg m/s C(d) None of them
3 KM
24. A body moves from A to B and then from B to C as shown 90 in the figure the displacement of the body is A 4km B
(a) 7 KM(b) 5 KM(c) 12 KM(d) 0 KM
25. In the above figure, if he takes 5 hours from A to C then the average velocity is
(a) 1.4 Km/h(b) 1 Km/h(c) 2.4 Km/h(d) Non of these
ANSWERS:
Q.No. Ans Q.No. Ans
1
2
3
4
5
6
7
8
9
10
11
12
13
c
b
c
d
a
b
d
b
d
c
a
b
c
14
15
16
17
18
19
20
21
22
23
24
25
26
a
c
a
c
a
a
a
a
a
a
b
b
d
CHAPTER – 4WORK, POWER & ENERGY
1. A body is pushed through a distance of 2m by a force of 20N applied perpendicular to the direction of displacement. The work done is.
(a) Zero (b) 20J (c) 40J (d) 10J
2. The work done against the force of friction is.
(a) Positive (b) Negative (c) Zero (d) None
3. Which of the following is a conservative field?
(a) Gravitational field (b) Electric field (c) Magnetic field(d) All of the above
4. A machine of power 10 watts operates for a period of 2 minutes. The work done by it is.
(a) 20J (b) 120J (c) 1200J (d) 5J
5. The power required to pump 1000kg of water up 60m in one minute is.
1. In a physical pendulum the torque about the pivot due to gravity is
(a) mg sin θ (b) mg D cos θ(c) mgD sin θ (d) mg cos θ
2. In a S. H. M the period of oscillation is directly preparation to the.
(a) Square of amplitude (b) amplitude(c) Square root of displacement (d) Displacement
3. What will be the phase difference b/w the damping force and driving force?
(a) π/2 (b) π(c) 3 π/2 (d) 2π
4. If two vibrations of the same frequency are super imposed on a system with equal amplitude the max resultant amplitude could be.
(a) Zero (b) √2A(c) A/√2 (d) 2A
5. The Spring constant of a spring is 20N/m the period of 200-gm mass at the end of this spring is.
(a) 0.63 s (b) 0.69 s(c) 6.3 s (d) 63 s
6. Waves do not transport.
(a) matter from one place to another place (b) energy from one place to another place(c) both energy and matter from one place to another place (d) none of them
7. The distance b/w the consective node and anti node is
(a) λ (b) λ/2(c) λ/4 (d) 2
8. The speed of the transvers waves depend upon.
(a) √T/m (b) √m/T(c) √T only (d) √m only
9. Greater is the speed of the sound
(a) greater is modules of elasticity (b) Less is modules of elasticity (c) Greater is the density (d) None
10. The basic condition for path difference in a destructive interference is.
(a) (m + ½) λ (b) (m + 1)λ(c) mλ (d) none
11. The set of all frequencies due to which the string is moving is different loops is called
(a) Quantized frequencies (b) Fundamental frequencies (c) Limited frequencies (d) None of them
12. When a string is clamped b/w two end is plucked in the middle the it will be vibrate in a
(a) Single loop (b) Two loops (c) Three loops (d) None of them
13. All the equation for standing wave can also be applied for
(a) Compressional standing wave (b) Transverse standing waves (c) None of them (d) both of them
14. How many beats a human ear can detect in 1 s
(a) 7 (b) 8(c) 9 (d) 10
15. If the tension in the string is made 4 times of its initial value, the frequency of transverse wave is
(a) Doubled (b) quadrupled (c) Tripled (d) none
16. The frequencies of string higher than fundamental frequency are called
(a) Simple frequency (b) Multiple frequency(c) Over tones (d) None
17. The unit of intensity level “Bell” is equal to
6. A convex lens of focal length f1 and concave lens of focal length f2 are placed in contact the combination will act as convex lens if
(a) f1 7f2 (b) f1 < f2 (c) f1 = f2
(d) f1 = 2f2
7. For a real object a convex mirror always from an image, which is.
(a) Real and inverted (b) virtual and inverted(c) Virtual and erect (d) real and magnified
8. The power of converging lens is 2 diopter its focal length will be
(a) 2m (b) 2cm (c) 5m (d) .5m
9. A convex lens of glass is immersed in water compared to its power in air its power in water will.
(a) diminish for red light and increase for blue light(b) not change at all(c) increase (d) Diminish
10. If we decrease the aperture of a lens change will occur in
(a) Position of the image (b) size of the image(c) Intensity of the image (d) Both position and size
11. A cut diamond sparkles because of.
(a) Its hardness (b) its high refractive index(c) Emission of light by diamond (d) absorption of light
11.(b) If we take two lenses of same power are placed in contact with each other the focal length of the combination will then.
(a) Increases (b) decreases (c) Remain same as that ofIndividual lens
(e) None
12. A man 2.2m tall stands 6m in the front of a plane mirror the image will be tall of.
(a) 2.2m (b) 1.6m (c) 6m (d) 67 inches
13. The relationship between image size I and image distance d for real image formed by a converging lens which graph best representation of the relation ship.
I I(a) (b)
I(c) (d)
d
14. The length of astronomical telescope for normal adjustment is.
(a) fo x fe (b) fo + fe (c) fo-fe (d) fofe
15. The refractive index of a given piece of transparent quartz is the greater for.
(a) Violet light (b) Green light (c) Red light(d) Blue light
16. The minimum distance b/w the object and its real image formed by a convex lens of focal length f is
d d
d
(a) f (b) 2f(c) 2.5f (d) 4f
17. The power of the lens is one dioptre, if its focal length is
(a) 1cm (b) ½ cm(c) 1 meter (d) 10 cm
18. A normal eye can see an object distinctly if it is placed at a distance of:
(a) 15 cm (b) 25 cm(c) 35 cm (d) 45 cm
19. Final image formed by a simple microscope is
(a) Real and erect (b) real and inverted(c) Virtual magnified and erect (d) virtual, inverted and magnified
20. If half of a convex lens is covered then it will give:
(a) No image of an object(b) Clear image as before when it was not covered (c) An image with less brightness (d) Half image of the object