1. One atmospheric pressure is equal to
a. 108 Nm-2
b. 107 Nm-2
c. 106 Nm-2
d. 105 Nm-2
2. By increasing the temperature of liquid, its
a. volume and density decrease
b. volume and density increase
c. volume increase and density decrease
d. volume decrease and density increase
3. Heat travels through vacuum by
a. conduction
b. convection
c. radiation
d. both a and b
4. Which of the following is the sure test for electrification?
a. attraction
b. repulsion
c. induction
d. friction
5. Lighting conductor
a. conducts the charge to the earth
b. repels the charge on clouds
c. removes the clouds
d. none of these
6. When two bodies collide, they always
a. have same masses
b. exert equal but opposite force on each other
c. have equal but opposite velocities
d. have same velocities
7. When we increase the speed of a wave, its
a. wave length decreases
b. frequency decreases
c. wave length increases
d. frequency increases
8. Longitudinal wave can be propagated through
a. gas only
b. liquid only
c. solid only
d. solid, liquid and gas
9. When a body falls freely, its potential energy changes into
a. nuclear energy
b. electrical energy
c. magnetic energy
d. kinetic energy
10. takes the greatest value for water
a. specific heat of water
b. heat capacity of water
c. sp. latent heat of fusion of ice
d. sp. latent heat of vaporization of water
11. When a body is projected into space and we neglect the air resistance, the motion along the horizontal direction has
a. an acceleration equal to 9.8 ms-2
b. an deceleration equal to 9.8 ms-2
c. variable velocity
d. uniform speed
12. A bucket has a certain amount of liquid. If we immerse a solid into it, it
a. increases the pressure at the bottom
b. decreases the pressure at the bottom
c. decreases the height of the liquid
d. increases the mass of the liquid
13. We have 0.5 cal, energy, which is equal to
a. 4.2J
b. 8.4J
c. 2.1J
d. 0.2J
14. The dimension of mass in dimensional formula of a velocity is equal to
a. 1
b. 2
c. 3
d. 0
15. Substance which allow partially to flow the charge through them are called
a. insulators
b. conductors
c. semi-conductors
d. none
16. If R be the radius of the earth than the gravitational, potential at any point on the surface of the earth is
a. –gR
b. –gR2
c. –g2R2
d. g2R
17. The amount of heat required to melt 10 gm of ice at 0°C is
a. 100 cals
b. 80 cals
c. 800 cals
d. 750 cals
18. A man can jump 6 feet on the surface of the earth. How high can he jump on the surface of the moon?
a. 6 feet
b. 12 feet
c. 30 feet
d. 36 feet
19. The S.I. unit of surface tension is
a. Nm-1
b. Nm2
c. KgS-1
d. Jm3
20. Water equivalent is equal to
a. refraction
b. reflection
c. total internal reflection
d. diffraction
21. 1 g/cm3 of the density of water is equal to
a. 103 kg/m3
b. 104 kg/m3
c. 105 kg/m3
d. 106 kg/m3
22. A person of mass 50 kg is falling down with acceleration equal to 10m/s. What is the weight of the person?
a. 50N
b. 500N
c. 0
d. 5N
23. Which of the following is a good conductor of electricity?
a. rubber
b. silicon
c. germanium
d. iron
24. Ohms law is
a. V=l/R
b. I=V/R
c. R=VI
d. I =R/V
25. A mirror produces magnification equal to-3 for a real object, then
a. it should be concave mirror
b. it should be convex mirror
c. both a and c are true
d. the image should be virtual
26. When the acceleration and the velocity are oppositely directed,
a. it decreases the velocity
b. it increases the velocity
c. it doesn't change the velocity
d. it may decrease or increase the velocity
27. The value of gravitational force of attraction is equal to when two1 kg masses are kept at a distance of 1 m
a. 1N
b. 0.1N
c. 6.67×10-11N
d. 1/6.67×10-11N
28. The height of the mercury in the barometer is less than 760 mm of Hg. It means the atmospheric pressure
a. is greater than 1 atm.
b. is equal to 1 atm
c. is less than 1 atm
d. is equal to 0 atm
29. The magnitude of induced emf is the rate of change of magnetic flux through it.
a. directly proportional to
b. inversely proportional to
c. inversely proportional to the square of
d. directly proportional to the square of
30. D.C. current has frequency
a. 50 Hz
b. 0 Hz
c. 25Hz
d. 100Hz
31. Lightening was discovered by
a. Faraday
b. Franklin
c. Ohm
d. Maxwell
32. Which of the following relation is correct in magnetism?
a. I=V+H
b. V2 = I+H
c. V2=I2+H2
d. I2=V2+H2
33. Dimension of electric current is
a. MLT-2
b. ML1T-1A
c. M0L0T0A
d. M1L1T1A
34. A physical quantity is one which
a. cannot be measured
b. can be measured
c. is a scalar quantity
d. is a vector quantity
35. If angle between two equal forces is 90°, magnitude of resultant is;
a. F/√2
b. 2F
c. √2 F
d.
36. A projectile will cover the maximum vertical distance in the minimum time when its angle of projection with horizontal is
a. 30°
b. 450
c. 600
d. 900
37. If the range of the projectile be R, then its K.E. is maximum after covering a distance equal to
a. R/4
b. R/2
c. 3R/4
d. R
38. A ball is released from the top of a tower of height 'h' m. It takes “t” sec. to reach the ground, Where is the ball at t/2 sec.?
a. at h/2 m from the ground
b. at h/4 m from the ground
c. at 3h/4 m from the ground
d. it depends upon the mass and volume of the ball.
39. Three identical resistance are connected in parallel, if their equivalent resistance is 18 ohm, then the individual resistance is
a. 36 ohm
b. 54 ohm
c. 6 ohm
d. 2 ohm
40. A 6 V battery is connected to a 3-ohm resistor. How much charge flows through the resistor in 20 sec?
a. 0.5C
b. 10C
c. 20 C
d. 40C
41. The maximum e.m.f. in an a.c. generator does not depend on
a. the magnetic field
b. number of turns in the coil
c. the resistance of the coil
d. frequency of rotation
42. The element used in an electric heater is
a. platinum
b. tungsten
c. nichrome
d. copper
43. A body acquires positive charge, This means that body
a. has gained protons
b. has gained positrons
c. has gained electrons
d. has lost electrons
44. The distance between a crest and the next trough in a periodic wave is
a. λ
b. λ/2
c. λ/4
d. 2 λ
45. If a red rose is observed in a background with red light it will appear
a. greenish yellow
b. blue
c. invisible
d. red
46. The near point of a normal eye is
a. 25 m
b. 25cm
c. 2.5cm
d. Infinity
47. Threshold of hearing is equal to
a. 130 db
b. 120db
c. 0db
d. 20db
48. When the amplitude of vibration of a tuning fork is made three times the initial value, the intensity will be
a. one ninth
b. three times
c. nine times
d. none
49. The refractive index of a medium is 2, the velocity of light in the medium will be
a. 2 times
b. 1/2 times
c. quarter times
d. nine times
50. What is the unit of magnetic flux?
a. orested
b. weber
c. farad
d. gauss
51. Cross product between two vectors i.e. Å x B gives
a. AB sinθ
b. AB cosθ
c. AB cosθň
d. AB sinθn
52. A rider on a horseback falls forward when the horse suddenly stops. This is due to
a. inertia of the horse
b. the inertia of the rider
c. large weight of the horse
d. losing the balance
53. A man in a lift weight more, when the lift
a. begins to go up
b. is going up steadily
c. is slowing down
d. is descending freely
54. A cricketer catches a cricket ball of mass 0.15 kg moving with a speed of 20 ms-1. The process of catching is completed in 0.1 sec. The average force exerted by the player is
a. 30N
b. 3N
c. 0.03N
d. 0.3N
55. A particle is thrown vertically upwards with a speed of 100m/s. The time taken to reach the body back on the earth is
a. 20s
b. 10s
c. 15s
d. 5s
Good work sathi
ReplyDelete