Physics Past Questions v20 for (JAMB/WAEC/NECO)

Physics Past Questions v20 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

Results

A) Specific latent heat of vaporization

B) Specific heat capacity of ice

C) Specific latent heat of fusion

D) Specific heat capacity of water

C) I and II only

D) I and III only

E) II and III only

A) Brightness Of Y will reduce

B) Brightness Of Y will remain constant

C) Brightness Of Y will increase

D) fuse F will blow

A) P = Q + R

B) P = Q - R

C) P = R - Q

D) P + Q + R = O

A) A high resistance in parallel

B) A high resistance in series

C) A low resistance in parallel

D) A low resistance in series

C) 4800.0Vm-1

D) 75000.0Vm-1

A) the same in magnitude and direction

B) the same in magnitude but different in direction

C) different in both magnitude and direction

D) different in magnitude but different in direction

A) increase its capacitance

B) decrease its capacitance

C) insulate the plate from each other

D) increase the magnetic field between the plates

A) increasing the frequency

B) increasing the amplitude

C) decreasing the loudness

D) decreasing the intensity

A) earth is between the moon and the sun

B) sun is between the moon and the earth

C) moon is between the sun and the earth

D) ozone layer is threatened

A) convex and u =2f

B) concave and u = 2f

C) convex and u = f

D) concave and u = f

A) Red and Violet

B) Green and Yellow

C) Red and Indigo

D) Yellow and Violet

A) i and ii only

B) i and iii only

C) ii and iii only

D) i, ii, iii.

A) decrease because the density of water decreases with temperature

B) increase beBcause the density of water decreases with temperature

C) decreases because the density of water increases with water temperature

D) increase because the density of water increases with temperature

A) x = 1, y = -1, z = 1

B) x = 0, y = 1, z = -1

C) x = 1, y = 0, z = -1

D) x = 0, y = 1, z = 1

A) specific heat capacity of ice

B) specific heat capacity of water

C) specific latent heat of fusion

D) specific latent heat of vaporization

A) atmospheric pressure acts on the surface of the lake

B) pressure increases with depth

C) density remains constant with pressure

D) the bubble experiences an upthrust

A) 0. 10 ms-2

D) 10.00ms-2

A) i, iii only

C) ii, iii only

D) ii, iv only

A) translational

B) oscillatory

D) rotational

A) 3.2 x 105N

B) 1.8 x 105N

C) 3.2 x 10-5N

D) 1.8 x 10-5N

D) Aluminium

D) 24 days .

A) Conduction

B) Radiation

C) Convection

D) Evaporation

E) Expansion

A) I and IV only

B) II and III only

C) III and IV only

D) I, II and III only

E) I, III and IV only

A) 3.40x106V B) 6.75x105V C) 6.75x1012V D) 3.40x105V E) 8.30 x 102V

B) 6.75x105V

C) 6.75x1012V

D) 3.40x105V

E) 8.30 x 102V

A) frequencies

D) intensities

E) overtones

A) 300.0ms-1

B) 225.0ms-1

C) 112.5ms-1

A) Reflection

B) Refraction

C) Diffraction

D) Polarization

E) Interference

A) I and III only

B) II and III only

C) I, II and III only

D) I, II and IV only

E) I, II, III and IV

A) Incandescent electric bulb

B) Incandescent fluorescent tube

C) Lighted candle

A ) real, inverted and magnified

B) at the principal focus

C) real and diminished

D) erect and virtual

E) at the centre of curvature

A) 1.35 x 103J

B) 5.38 x 103J

C) 6.72 x 103J

D) 7.06 x 103J

E) 8.06 x 103J

E) 200.0ms-1

A) 40.00 rad s-1

B) 14.00 rad s-1

C) 2.50 rad s-1

D) 1.58 rad s-1

E) 0.40 rad s-1

A) Gamma rays

B) Alpha particles

C) Beta particles

A) Heat capacity

B) Electric current

D) Reactance

A) Alpha particle

B) Beta particle

C) Gamma ray

A) Increasing the mass of the bob

B) Decreasing the mass of the bob

C) Increasing the length of the string

D) Decreasing the length of the string

E) Increasing the amplitude of oscillation

Recent Updates

Free JAMB Subject Combination Tool

Physics Past Questions v20 for (JAMB/WAEC/NECO)

Student Village

Physics Past Questions v20 for (JAMB/WAEC/NECO)

Results

#1. A quantity of ice at -10°C is heated until the temperature of the heating vessel is 90°C. Which of the following constants is NOT required to determine the quantity of heat supplied to the vessel?

#2. A machine has an efficiency of 80%. If the machine is required to overcome a load of 60N with a force of 40N, calculate its velocity ratio.

#3. An air bubble of volume 4cm3 is formed 20m under water. What will be its volume when it rises to just below the surface of the water if the atmospheric pressure is equivalent to a height of 10cm of water?

#4. The energy stored in a capacitor of capacitance 5 μF is 40J. What is the voltage applied across its terminals?

#5. The force exerted on a charged body in an electric field depends on I. the charge on the body II. the electric field intensity III. the square of the mass of the body

#6. The value of T in the figure above is

#7. The acceleration of the system show above is

#8. A body of mass 40kg is being dragged along the floor by a rope inclined at 60 degrees to the horizontal. The frictional force between the box and the floor is 100N and the tension on the rope is 300N. How much work is done by dragging the box for a distance of 4m

#9. The figure above shows two similar bulbs X and Y connected to suitable power supply with F as an appropriate fuse rating, if the filament of X breaks then the

#10. The resultant capacitance in the figure above is

#11. In the above fig, PQ and R are vectors, which of the following options, gives a correct relationship between the vectors

#12. An electric current of 2 amperes flows in a heating coil of resistance 50 ohms for 3 minutes 20 seconds. Determine the heat produced

#13. If the maximum voltage across a 100ohms resistor is 20V, then the maximum power it can dissipate is

#14. Which of the following is required to convert a milliammeter to an ammeter?

#15. A light of energy 5eV falls on a metal and the electrons with a maximum kinetic energy of 2eV are ejected. The work function of the metal is

#16. Two parallel plates at a distance of 8.0 x 10-3m apart are maintained at a p.d of 600 volts with the negative plate earthed. What is the electric field strength?

#17. At different locations on the earth's surface, the earth's magnetic field is

#18. If a resistance is halved in value and the potential difference across it is tripled, then the ratio of the new current to the old one is

#19. A 12V battery has an internal resistance of 0.5W.If a cable of 1.0W resistance is connected across the two terminals of the battery, the current drawn from the battery is

#20. The purpose of a dielectric material in a parallel plate capacitor is to

#21. The pitch of an acoustic device can be increased by

#22. Total eclipse of the sun occurs when the

#23. What is the approximate critical angle for total internal reflection for diamond if the refractive index of diamond is 2.42?

#24. A real object is placed at a distance ucm in front of a curved mirror of focal length fcm. If the image is upright and magnified, then the mirror is

#25. Which of the following pairs of colours gives the widest separation in the spectrum of white light?

#27. A well-lagged bar of length 100cm has its ends maintained at 100oC and 40oC respectively. What is the temperature at a point 60cm from the hotter end?

#28. The wavelength of signals from a radio transmitter is 1500mm and the frequency is 200kHz. What is the wavelength for a transmitter operating at 100kHz?

#29. A piece of wood floats inside water at room temperature with a fraction of it above the liquid surface. As the temperature of the water is raised, the part of the wood above the liquid will

#30. The equation PxVyTz = constant in charles' law when

#31. An electric kettle with negligible heat capacity is rated at 2000W. If 2.0kg of water is put in it, how long will it take the temperature of water to rise from 20OC to 100OC? [specific heat capacity of water = 4200Jkg-1k-1]

#32. A temperature scale has a lower fixed point of 40mm and a upper fixed point of 200mm. What is the reading on this scale when a thermometer reads 60oC?

#33. A quantity of ice at 10oC is heated until the temperature of the heating vessel is 90oC. Which of the following constants is NOT required to determine the quantity of heat supplied to the vessel?

#34. The energy contained in a wire when it extended by 0.02m by a force 500 N is

#35. A hydraulic press has a large circular piston of radius 0.8m and a circular plunger of radius 0.2m. A force of 500N is exerted by the plunger. Find the force exerted on the piston

#36. The volume of an air bubble increases from the bottom to the top of a lake at constant temperature because

#37. A rectangular metal block of volume 10-6m3 at 273k is heated to 573k. If its coefficient of linear expansion is 1.2 x 10-5k-1, the percentage change of it volume is

#38. What is the acceleration due to gravity 'g' on the moon, if g is 10-2 on the earth?

#39. A body is projected from the earth's surface with the intention of letting it escape from the earth's gravitational field. What is the minimum escape velocity of the body? [Earth's radius = 6.4 x 103km, g = 10ms-2]

#40. A uniform rod PQ of length 1m and mass 2kg is pivoted at the end p. If load of 14N is placed at the center of the rod, find the force that should be applied vertically upwards at Q to maintain the rod at equilibrium horizontally [g = 10ms-2]

#41. Which of the following statements are TRUE about frictional force? i. it is always a disadvantage ii. it is sometimes a disadvantage iii. it always exist where there is a relative motion of two bodies that are in contact iv. it is sometimes very useful

#42. Which of the following is the dimension of pressure?

#43. The length of a displaced pendulum ball which passes its lowest point twice every seconds is [g = 10m-2]

#44. When a ball rolls on a smooth level ground, the motion of its center is

#45. A charge of 1.6 x 10-10C is placed in a uniform electric field of intensity 2.0 x 105 NC-1. calculate the magnitude of the electric force extended on the change

#46. A capacitor of capacitance 25µF is connected to an a.c power source of frequency 200/πHz. Calculate the reactance of the capacitor

#47. Which of the following is used for shielding radioactive fall-outs?

#48. A radioactive nuclide of mass 6.09 has a half-life of 8 days. Calculate the time during which 5.25g of the nuclide would have decayed

#49. A moving-coil meter with an internal resistance of 100Ω has a full-scale deflection when a current of 10m2 flows through it. What value of resistance would convert it to read 10V at full- scale deflection?

#50. Which of the following cannot be explained by the molecular theory of matter?

#51. What is the potential difference between X and Y in the diagram above if the battery is of negligible internal resistance

#52. Calculate the current in the 3 resistor in the diagram above if the battery is of negligible internal resistance

#53. Which of the following is a wind instrument?

#55. The energy stored in a capacitor of capacitance 5μF is 40J. Calculate the voltage applied across its terminals?

#56. The effective capacitance between points X and Y in the diagram below is 1.0μF, What is the value of the capacitance C, measured in micro-farad?

#57. A balloon containing 546cm3 of air is heated from 0oC to 10oC. If the pressure is kept constant, what will be its volume at 10oC?

#58. Calculate the electric potential at a distance of 20.0cm from a point charge of 0.015C placed in air of permittivity (Take 1/4πεo as 9.0 x 109 Nm2C2)

#59. Calculate the inductive reactance of the circuit shown above.

#60. If the current in the resistor R in diagram above is 0.05A, calculate the p.d. across the inductor.

#61. The period of a wave is 0.02 second. Calculate its wavelength if its speed is 330 ms-1

#62. An alternating voltage with a frequency of 50Hz has a period of

#63. A listener can detect the instrument from which a note is being sounded because different instruments produce the same note with a different.

#64. What is the escape velocity of a body on the surface of the earth of radius R if the gravitational constant is G and the mass of the earth is M? (Neglect energy losses to the surroundings)

#65. A wire is stretched between two points, 1m apart. If the speed of the wave generated on plucking the wire is 200ms-1, what is the minimum frequency which will resonate with the wire?

#66. Sixty complete waves pass a particular point in 4s. lf the distance between three successive troughs of the waves is 15m, calculate the speed of the waves,

#67. Which of the following wave characteristics can be used to distinguish a transverse wave from a longitudinal wave?

#68. A sound note of frequency 250 Hz and wavelength 1.3m is produced at a point near a hill. If the echo of the sound is received 1 second later at the point, how far away is the hill from the point?

#69. A ray of light is incident on a body x as shown in the diagram above. What is the refractive index of the body?

#70. Light travels in straight lines. In which of the following is this principle manifested? I. Pinhole camera II Formation of shadows III. Diffraction of light IV. Occurrence of eclipse

#71. Which of the following is not self-luminous?

#72. An object is placed on the principal axis at the centre of curvature of a concave mirror. The image of the object formed by the mirror is

#73. The temperature of glass vessel containing 100cm3 of mercury is raised from 10oC to 100oC. Calculate the apparent cubic expansion of the mercury. (Real cubic expansivity of mercury = 1.82 x 10-4K-1) (Cubic expansivity of glass = 2.4 x 10-5K-1)

#75. How much heat is required to convert 20 g of ice at 0oC to water at the same temperature? (Specific latent heat of ice = 336 J g-1)

#76. When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that in Q. lf the masses of P and Q are the same, calculate the ratio of the specific heat capacities of Q to P.

#77. A ray of light is incident on mirror m1 and after reflection is incident on mirror m2 as shown in the diagram, calculate the angle of reflection of the ray at mirror m2

#78. A brass rod is 2 m long at a certain temperature. Calculate the linear expansion of the rod for a temperature change of 100K. (Take the linear expansivity of brass as 1.8 x 10'5K").

#79. A body of specific heat capacity 450J kg-1 K-1 falls to the ground from rest through a vertical height of 20m. Assuming conservation of energy, calculate the change in temperature of the body on striking the ground level. (g = 10ms-2)