Physics Past Questions v42 for (JAMB/WAEC/NECO)

Physics Past Questions v42 For (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

JAMB
Post-UTME / Post-JAMB
WAEC
NECO
WAEC GCE
NECO GCE
NABTEB
NABTEB GCE

Physics Past Questions v42 For (JAMB/WAEC/NECO)

Results

A) 3.47 x 1018

B) 6.93 x 10 20

C) 3.47 x 1020

D) 6.93 x 1018

A) β - rays are produced

B) holes are produced

C) x - rays are produced

D) electrons leave a hot element

A) germanium

C) grapefruit

A) interference

B) diffraction

C) accomodation

D) superposition

B) become positively charged

C) become negatively charged

D) open further

A) 3.86 x 105J

B) 3.56 x 105J

C) 1.80 x 104J

D) 2.16 x 105J

A) II, III, and IV only

B) I, II and III only

C) III and IV only

D) II and IV only

A) 10 cm in front of the mirror.

B) 5 cm in front of the mirror

C) 10 cm behind the mirror

D) 5 cm behind the mirror

A) x is same as in y

B) x and y is same as in vacuum

C) x is higher than in y

D) y is higher than in x

A) 1.15 x 104s

B) 1.15 x 103s

C) 4.6 x 104s

D) 4.6 x 103s

A) cohesion of water to glass is stronger than the cohesion of water molecules

B) adhesion of water molecules is weaker than the cohesion of water to glass

C) cohesion of water to glass is weaker than the cohesion of water molecules

D) adhesion of water molecules is stronger than the cohesion of water molecules

A) convection

B) radiation

C) refraction

D) conduction

A) they are cheap

B) they are sourced locally

C) the speed of sound in them is very low

D) the speed of sound in them is very high

C) intensity

A) 1400 kgm-3

B) 1250 kgm-3

C) 500 kgm-3

D) 1000 kgm-3

A) bi-metalic strip thermometer

B) thermocouple

C) platinium resistance thermometer

D) optical pyrometer

A) room temperature

B) boiling point

C) freezing point

D) standard temperature

A) I and III only

B) II and III only

C) III and IV only

D) I and II only

A) 6.0 x 10-2J

B) 7.6 x 10-2J

C) 1.8 x 10-2J

D) 6.6 x 10-2J

A) I, II and IV only .

B) I and II only

C) II and III only

D) III and IV only

B) 3.50 ms-2

C) 1.00 ms-2

D) 2.00 ms-2

A) III, IV and V only

B) II, III and V only

C) II, III and IV only

D) I,II and III only

A) atomic numbers

B) nucleon numbers

C) proton numbers

D) neutron numbers

A) 9.0 x 10-24m

B) 4.55 x 10-17m

C) 7.25 x 10-11m

D) 6.20 x 10-8m

A) remains the same

B) becomes parallel to the wire

C) ceases to exist

D) is oppositely directed

A) electric charges evaporate from the surface of the conductor

B) charges are connected to earth

C) charges on the conductor are neutralized by opposite charges from the surrounding air

D) charges ionize the surrounding air

A) effective resistance of the circuit is halved

B) total power dissipated is doubled

C) total current in the circuit is halved

D) terminal voltage is halved

B) wavelength

C) amplitude

D) intensity

B) microwaves

C) infrared radiation

D) alpha rays

B) doppler effect

C) acoustic resonance

A) a gravitational force acting on it

B) a uniform velocity

C) an acceleration

D) a centripetal force acting on it

A) light waves

B) sound waves

C) sea waves

D) radio waves

A) diffraction

B) inteference

C) reflection

D) refraction

A) at the centre of curvature

B) at the focus

C) between the focus and the pole of the mirror

D) beyound the radius of curvature

A) is raised

B) is lowered

C) remains unchanged

D) is first raised, then lowered

A) hydrometer

B) barometer

C) hypsometer

D) hygrometer

A) ii and iii only

B) ii, iii and iv only

C) i, iii and iv only

D) i, ii amd iv only

A) ideal gases

B) a fixed mass of gas

C) a mixture of gases

D) a gas at variable temperature

C) kilowatt-hour

A) vibrational motion

B) random motion

C) translational motion

D) rotational motion

A) changes its direction at constant speed

B) mauntains a constant linear speed

C) covers equal distances in equal times in a straight line

D) is acted upon by balanced forces

A) liquids only

B) solids only

C) liquids and gasses only

D) solids, liquids and gases

A) i, ii, iii and iv

B) i, ii and iii only

C) i, ii and iv only

D) i and iii only

A) amplitude

B) frequency

D) wavelength

C) i and ii only

D) ii and iii only

E) i, ii and iii

A) Hydrometer

B) Barometer

C) Manometer

D) Hypsometer

E) Hygrometer

A) 64 minutes

B) 32 minutes

C) 8 minutes

D) 2 minutes

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Physics Past Questions v42 for (JAMB/WAEC/NECO)

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Physics Past Questions v42 for (JAMB/WAEC/NECO)

Results

#1. f the decay constant of a radioactive substance is 0.231s1, the half-life is?

#2. A piece of radioactive material contains 1020 atoms. If the half life of the material is 20 seconds, the number of disintegration in the first second is

#3. Thermionic emission is the process whereby

#4. Which of the following can conduct electricity owing to the presence of free mobile electrons?

#5. The ability of the human eye to focus object on the retina is referred to as the power of

#6. Which of the following is a secondary colour

#7. If negative charges are induced on an electroscope and a positively charged rod is brought near the cap of the electroscope, the leaves will

#8. An electric lamp marked 240v, 60 W is left to operate for an hour. How much energy is generated by the filament?

#9. A band of 500 rectangular loops of wire of area 20 cm by 20 cm, encloses a region of magnetic field which charges from 1.0T to 0.4T within 5 seconds, calculate the induced e.m.f.

#10. Question 70 I. Moon. II. Sun. III.street light. IV. stars. Which of these above is a natural source of light?

#11. An object is placed 5 cm from the pole of a concave mirror. if the focal length of the mirror is 10 cm. what is the image distance?

#12. Calculate the position of an object placed in front of a convex mirror having focal length of 12 cm such that an image is formed 6 cm away from the mirror

#13. If the refractive index of crown glass is 1.51, its critical angel is.

#14. When light passes through two media x and y of refraction indices 1.51 and 1.33 respectively, the speed of light in

#15. A heating coil rated 1000 W is used to boil off completely 2 kg of boiling water. the time required to boil of the water is_______[Special latent heat of Vaporization of water = 2.3 x 106 Jkg-1]

#16. It is observed that water will wet a clean glass because the

#17. A man standing 2 m from a charcoal fire is warmed mainly by

#18. Metal cables are used as telephone wires because

#19. Musical instruments playing the same note can be distinguished from one another owing to the differences in their

#20. A plastic sphere floats in water with 50% of its volume submerged. if it floats in glycerine with 40% of its volume submerged,the density of the glycerine is?

#21. The thermometer whose reading is indicated by a change in colour of its thermometric property is the?

#22. At 4°c, the volume of a fixed mass of water is?

#23. An electric heater rated 220v, 1000 w is immersed into a bucket full of water, calculate the mass of water if the temperature changes from 30°c to 100°c and the current flows for 300seconds.[specific heat capacity of water = 4200 jkg-1 K-1]

#24. If the pressure of the vapour on top of an enclosed liquid is equal to the atmospheric pressure, what will be the temperature of the liquid enclosed?

#25. If a cage containing a truck of coal weighing 750 kg is raised to a height of 90 m in a minute, what is the total power expended? [g = 10 ms2]

#26. An object of mass 80 kg is pulled on a horizontal rough ground by a force of 500 N. Find the coefficient of static friction. [g = 10 ms-2]

#27. If a heavy barrel is rolled up a plane inclined at 30° to the horizontal. its velocity ratio will be

#28. I. Density of the liquid. II. Acceleration due to gravity. III. Type of container of the liquid. IV. The constituents of the liquid. Which of the above conditions will NOT affect the pressure of fluid?

#29. If a load of mass 10N stretched a cord by 1.2cm, what is the total work done?

#30. I. Diameter of a small ball bearing. II. Thickness of a pieces of paper. III. Diameter of a measuring cylinder. IV. Length of a piece of wire. Which of the above can be measured using a micrometer screw gauge?

#31. What is the acceleration between two points on a velocity time graph which has coordinates (10s, 15 ms-1) And (20 s, 35 ms-1)?

#32. A bullet fired vertically from upward from a gun held 2.0 m above the ground reaches its maximum height in 4.0s. calculate its initial velocity. [g = 10ms-2]

#33. I. The motion of the tyres of a moving car. II. The motion of a loaded test tube oscillated vertically. III. The beating of the heart. IV. A stone tied to a string and whirled round. V. The motion of the pistons in a gasoline engine. Which of the motions above is simple harmonic?

#34. Two isotopes of uranium are designed as and . The numbers 238 and 235 represent their

#35. An electron of mass 9.1 x 10-31 kg moves with a speed of 107ms-1. Calculate the wavelength of the associates wave[h = 6.6 x 10-34Js]

#36. A wire of resistivity 4.40 x 10-5 omega cm has a cross sectional area of 7.50 x 10-4 cm2. Calculate the length of the wire that will be required to make a 4.0 omega resistor

#37. If the direction of the curent in a straight wire is reversed, the magnetic field

#38. An ammeter connected to an a.c circuit records 5.5. The peak current in the circuit is

#39. When a conductor mounted on an insulating stand is charged and left for sometime, the conductor eventually loses all its charges. This is because the

#40. A resistor of resistance R is connected to a battery of negligible internal resistance. If a siilar resistor is connected in series with it the

#41. A thin lens is placed 50cm from an illustrated object. The image produced has linear magnification of 1/4 . Calculate the power of the lens in dioptres

#42. Which of the following characteristics of light determines its colour?

#43. Which of the following is not a part of the electro-magnetic spectrum?

#44. Sound interference is necessary to produce the phenomenon of

#45. A satellite in circular motion around the earth does not have

#46. A boat is rocked by waves of speed 30ms-1 whose successive crest are 10m apart. Calculate the rate at which the boat recieves the waves

#47. Which of the following waves is not transverse

#48. Light travelling through a small pinhole usually does not make a shadow with a distinct sharp edge because of

#49. The angle of incidence of a ray of light on a plane mirror is 55o. Determine the angle between the reflected ray and the mirror

#50. A concave mirror forms a magnified and errect image only when the object is placed

#51. When table salt is added to ice, the melting point of the ice

#52. Which of the following is used to measure relative humidity?

#53. Which of the following factors affect the rate of evaporation of a liquid? i. Exposed surface area ii Temperature of the surroundings iii. Thermal capacity of the liquid iv. Relative humidity of the surroundings

#54. A stone of mass 0.5kg is dropped from a height of 12m. Calculate its maximum kinetic energy. [g = 10ms-1]

#55. A machine of efficiency 80% is used to lift a box. If the effort applied by the machine is twice the weight of the box. Calculate the velocity ratio of the machine

#56. A faulty thermometer registers 102.5oC t 100oC. If the thermometer has no zero hour, what will it register at 55oC?

#57. A rod of initial lenght 2m at a temperature of 25oC is heated to 80oC. Calculate the increase in length of the rod if its linear expansivity is 4.0 x 10-3K-1

#58. as a bicycle Tyre was being pumped up, it was noticed that contrary to Boyle's law the volume increased as the pressure increased. The best explanation of this is that Boyle's law is only true for

#59. Two forces 6N and 8N, act eastwards and northwards respectively on a body. Calculate the magnitude of their equilibrant

#60. The period of a simple pendulum of length 80.0cm was found to have doubled when the length of the pendulum was increased by X. Calculate X.

#61. A body of mass 5kg movimg with a velocity of 30ms-1 due east is suddenly hit by another body and changes its velocity to 50ms-1 in the same direction. Calculate the magnitude of the impulse received.

#62. Electric energy is measured in

#63. In a hydraulic press, a force of 40N is applied to the smaller priston of area 10cm2. If the area of the larger piston is 200cm2, calculate the force obtained

#64. A body of volume 0.046m3 is immersed in a liquid of density 980kgm-3 with of its volume submerged. Calculate the upthrust on the body. [g = 10ms-2]

#65. Which of the following types of types of motion will be produced when a pair of equal and opposite non-collinear parallel forces acts on a body?

#66. A moving body accelerates when it

#67. In which of the following states of matter do the molecules vibrate about their mean positions?

#68. Which of the following properties of a steel bar can be measured in terms of the dimension of length only?

#69. Which of the following physical quantities are derived? i. Area ii. Thrust iii. Pressure iv. Mass

#70. In the wave equation y = Eo, sin(299t - ), Eo represents the

#71. In which of the following is a stationary wave produced? i. A vibrating turning fork held near the end of a resonance tube closed at one end. ii. A string tightly stretched between two points and plucked at its middle. iii. The tuning fork vibrating in air

#72. Which of the following instruments is used to measure relative humidity?

#73. It takes 4 minutes to boil a quantity of water electrically. How long will it take to boil same quantity of water using the same heating coil but with the current doubled? (neglecting any external heat loss).

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