Physics Past Questions v2 (JAMB/WAEC/NECO)

Physics Past Questions v1 (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations:

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Physics Past Questions v2 (JAMB/WAEC/NECO)

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#1. Fig 12 above shows the velocity time graph of a car which starts from rest and is accelerated uniformly at the rate of 3m sec-2 for 5 seconds. It attains a velocity which is maintained for a minute, The car is then brought to rest by a uniform retardation after another 3 seconds. calculate the total distance covered Options

A) 900m

A) 900m

B) 1920m

B) 1920m

C) 960m

C) 960m

D) 860m

D) 860m

#2. A uniform bean HK of length 10m and weighing 200N is supported at both ends as shown above. A man weighing 1000N stands at a point P on the beam. If the reactions at point H an K respectively are 800N and 400N, Then the distance HP is Options

A) 4m

A) 4m

B) 3.5m

B) 3.5m

C) 3m

C) 3m

D) 6 2 3 m

D) 6 2 3 m

E) 7m

E) 7m

#3. Fig 8 shows a current I flowing in a copper wire situated in a magnetic field existing between the pole-pieces of a horse-shoe magnet. Which of the following statements is correct? Options

A) The wire will experience a force in the direction into the paper

A) The wire will experience a force in the direction into the paper

B) The wire will experience a force in the direction out of the paper

B) The wire will experience a force in the direction out of the paper

C) The wire will vibrate in a direction into and out of the paper

C) The wire will vibrate in a direction into and out of the paper

D) the wire will move in the direction of the field i.e toward the s-pole

D) the wire will move in the direction of the field i.e toward the s-pole

E) the wire will not move because it is made of copper which is non magnetic

E) the wire will not move because it is made of copper which is non magnetic

#4. For the wave motion represented above, the wavelength is given by Options

A) p

A) p

B) q

B) q

C) r

C) r

D) s

D) s

E) t

E) t

#5. Fig 10 above shows a see-saw which is perfectly in balance, the weighs of the people sitting on it are 50kg, xkg and 15kg as shown, the sit at distances of 1.5, 1.5 and 2m from the pivot respectively. The vale of X is Options

A) 30

A) 30

B) 35

B) 35

C) 70

C) 70

D) 24.25

D) 24.25

E) impossible to find

E) impossible to find

#6. An electrical circuit is connected up as shown above, which of the following is correct about the value of current flowing through the 1 ohm resistance? Options

A) 12/13A

A) 12/13A

B) 13/12A

B) 13/12A

C) 1/3A

C) 1/3A

D) 3A

D) 3A

E) 12/7A

E) 12/7A

#7. The diagram shows lens arrangement in Options

A) A Compound Microscope

A) A Compound Microscope

B) astronomical telescope

B) astronomical telescope

C) binocular

C) binocular

D) periscope

D) periscope

E) projection lantern

E) projection lantern

#8. In a resonance tube experiment, which is illustrated above, the velocity of sound in air is 327.68m/s, the frequency of the turning fork used is therefore Options

A) 128HZ

A) 128HZ

B) 256HZ

B) 256HZ

C) 512HZ

C) 512HZ

D) 768HZ

D) 768HZ

E) 1024HZ

E) 1024HZ

#9. A concave lens of focal length 20cm form an image 1/2 the size of the object. The object distance is Options

A) 100cm

A) 100cm

B) 100/q

B) 100/q

C) 60cm

C) 60cm

D) 60/7

D) 60/7

E) None of the above

E) None of the above

#10. It is known that a neutron exists in a light atomic nucleus. Which of the following also exists in the nucleus? Options

A) an electron

A) an electron

B) a β -particle

B) a β -particle

C) an α -particle

C) an α -particle

D) a proton

D) a proton

E) an atom

E) an atom

#11. A weight of 1000 grams hangs from a lever 20cm to the fulcrum. At the left is a 500-gram weight 20cm from the fulcrum, and a 200-gram weight x cm away from the fulcrum. What is the value of x that will make the lever balanced? Options

A) 50cm

A) 50cm

B) 20cm

B) 20cm

C) 10cm

C) 10cm

D) 30cm

D) 30cm

E) 70cm

E) 70cm

#12. Radio carrier waves are generated by causing electrons to oscillate rapidly in Options

A) a microphone

A) a microphone

B) a television camera

B) a television camera

C) an antenna

C) an antenna

D) coaxial cables

D) coaxial cables

E) a transmitter

E) a transmitter

#13. Which of the following statements is correct? Silvered walls of a vacuum flask are used to prevent Options

A) heat loss due to conduction

A) heat loss due to conduction

B) vacuum loss

B) vacuum loss

C) heat entry into the inner flask due to convection

C) heat entry into the inner flask due to convection

D) heat loss due to radiation

D) heat loss due to radiation

E) heat loss due to convection

E) heat loss due to convection

#14. Which of the following electromagnetic waves has the shortest wavelength? Options

A) Radio waves

A) Radio waves

B) X-rays

B) X-rays

C) Infra-red

C) Infra-red

D) Blue light

D) Blue light

E) Ultraviolet

E) Ultraviolet

#15. All the heat generated in a 5 ohms resistor by 2A flowing for 30 seconds is used to evaporate 5g of a liquid at its boiling point. Which of the following is the correct value of the specific latent heat of the liquid? Options

A) 120J

A) 120J

B) 60Jg-1

B) 60Jg-1

C) 120Jg-1

C) 120Jg-1

D) 1500J

D) 1500J

E) 1500Jg-1

E) 1500Jg-1

#16. On which of the following is the operation of a moving coil galvanometer based? Options

A) Magnetic effect of electric current

A) Magnetic effect of electric current

B) Electromagnetic induction

B) Electromagnetic induction

C) Chemical reaction produced by electricity

C) Chemical reaction produced by electricity

D) Force on current carrying conductor in a magnetic field

D) Force on current carrying conductor in a magnetic field

E) Electrical energy and power

E) Electrical energy and power

#17. A body is released from rest and allowed to fall freely from a given height under gravity. The kinetic energy at its half-way point is Options

A) a little above half of its initial energy

A) a little above half of its initial energy

B) a little below half of its initial energy

B) a little below half of its initial energy

C) a half of its initioal energy

C) a half of its initioal energy

D) a little above its initial energy

D) a little above its initial energy

E) a little below its initial energy

E) a little below its initial energy

#18. Which of the following statements about radioactivity are true? i. alpha particle is positively charged ii. Beta particle is negatively charged iii. Gamma ray is neutral iv. Beta particle has the same mass as helium atom v. Gamma ray is charged Options

A) i, ii, iii and iv only

A) i, ii, iii and iv only

B) iv and v only

B) iv and v only

C) i, ii and iii only

C) i, ii and iii only

D) i, ii and v only

D) i, ii and v only

E) all

E) all

#19. Consider a thick glass tumbler and a thin glass tumbler which are made of the same kind of glass. Some hot liquid is poured into them. Which of the following statements is correct? Options

A) the thick tumbler is less likely to crack because it is stronger

A) the thick tumbler is less likely to crack because it is stronger

B) the thick tumbler is less likely to crack because it insulates the heat beter, glass being a poor conductor of heat

B) the thick tumbler is less likely to crack because it insulates the heat beter, glass being a poor conductor of heat

C) Both tumblers are equally likely to crack because they are made of the same kind of glass

C) Both tumblers are equally likely to crack because they are made of the same kind of glass

D) the thick tumbler is more likely to crack because uneven expansion persists for a longer time within the thicker glass

D) the thick tumbler is more likely to crack because uneven expansion persists for a longer time within the thicker glass

E) the thick tumbler is more likely to crack because it is heavier

E) the thick tumbler is more likely to crack because it is heavier

#20. A capacitor and a resistor are connected in series with each other and in series with an accumulator of negligible internal resistance. The potential across the terminals of the capacitor is Options

A) twice the e.m.f of the accumulator

A) twice the e.m.f of the accumulator

B) less than the e.m.f by the potential drop across the resistor

B) less than the e.m.f by the potential drop across the resistor

C) zero

C) zero

D) the same as the e.m.f.

D) the same as the e.m.f.

E) greater than

E) greater than

#21. Which of the following statements is correct? The magnetized state of an iron bar can be destroyed completely by Options

A) heating the bar to a high temperature

A) heating the bar to a high temperature

B) breaking the bar

B) breaking the bar

C) connecting opposite poles with a small piece of iron

C) connecting opposite poles with a small piece of iron

D) placing the bar inside a strong magnetic field

D) placing the bar inside a strong magnetic field

E) none of the above

E) none of the above

#22. An electric cell has an internal resistance of 2 ohms. A current of 0.5A is found to flow when a resistor of 5 ohms resistance is connected across it. What is the electromotive force of the cell? Options

A) 5 volts

A) 5 volts

B) 3.5 volts

B) 3.5 volts

C) 2.5 volts

C) 2.5 volts

D) 1 volts

D) 1 volts

E) 10 volts

E) 10 volts

#23. Which of the following is the correct definition of 'half-life'? Options

A) the average life-time of a radioactive material

A) the average life-time of a radioactive material

B) the time it takes a radioactive material to decay to half of its original quantity

B) the time it takes a radioactive material to decay to half of its original quantity

C) half the period a radioactive material decays completely

C) half the period a radioactive material decays completely

D) half of the decay constant

D) half of the decay constant

E) the decay constant times life-time

E) the decay constant times life-time

#24. In an electrolysis experiment, a cathode of mass 5g is found o weigh 5.01g after a current of 5A flows for 50 seconds. What is the electrochemical equivalent of the deposited substance? Options

A) 0.00004g/C

A) 0.00004g/C

B) 0.00002g/C

B) 0.00002g/C

C) 0.02500g/C

C) 0.02500g/C

D) 0.05000g/C

D) 0.05000g/C

E) 0.00001g/C

E) 0.00001g/C

#25. A man standing between two parallel mirrors in a barber's shop will see the following number of his own image Options

A) eight

A) eight

B) two

B) two

C) four

C) four

D) one

D) one

E) infinite

E) infinite

#26. A landlord has eight 40W electric light bulbs, four 60W bulbs and two 100W bulb in his house. If he has all the points on for five hours daily and if N.E.P.A. charges 5k per unit, his bill for 30 days is Options

A) N5.70

A) N5.70

B) N7.23

B) N7.23

C) N3.65

C) N3.65

D) N8.05

D) N8.05

E) N4.50

E) N4.50

#27. Which of the following statements is correct? The reading of pressure on a mercury barometer is independent of Options

A) the cross-sectional area of the tube

A) the cross-sectional area of the tube

B) the atmospheric pressure

B) the atmospheric pressure

C) the density of mercury

C) the density of mercury

D) the temperature of mercury

D) the temperature of mercury

E) the acceleration due to gravity

E) the acceleration due to gravity

#28. What are the units of thermal conductivity? Options

A) kg.m.sec2

A) kg.m.sec2

B) Joule sec-1m-1k-1

B) Joule sec-1m-1k-1

C) kg.m

C) kg.m

D) Newton sec-1m2

D) Newton sec-1m2

E) m3

E) m3

#29. When the vapour of a substance is in equilibrium with its own liquid, it is said to be Options

A) gaseous

A) gaseous

B) unsaturated

B) unsaturated

C) liquefied

C) liquefied

D) diffused

D) diffused

E) saturated

E) saturated

#30. If the wavelength of a wave travelling with a velocity of 360ms-1 is 60cm, the period of the wave is Options

A) 6s

A) 6s

B) 3.6s

B) 3.6s

C) 0.17s

C) 0.17s

D) 0.61s

D) 0.61s

E) 3s

E) 3s

#31. The heights of the mercury thread in a mercury-in-glass thermometer when in melting ice and then in steam are 3cm and 18cm respectively. At a temperature of 60oC the height would be Options

A) 7.5cm

A) 7.5cm

B) 9cm

B) 9cm

C) 10.8cm

C) 10.8cm

D) 12cm

D) 12cm

E) 12.6cm

E) 12.6cm

#32. An object is placed 30cm from a concave mirror of focal length 15cm. the linear magnification of the image produced is Options

A) o

A) o

B) 2/3

B) 2/3

C) 1

C) 1

D) 2

D) 2

E) 3

E) 3

#33. If a given mass at constant pressure obeys the relation...volume is proportional to the absolute temperature...the gas is said to obey Options

A) Hooke's Law

A) Hooke's Law

B) Boyle's Law

B) Boyle's Law

C) Dalton's Law

C) Dalton's Law

D) Charles' Law

D) Charles' Law

E) Newton's Law

E) Newton's Law

#34. Two closed vessels contain equal volumes of boiling water and are identical except that one is blackened on the outside while the other is polished. Which of the following is correct? Options

A) the polished vessel will cool faster because a polished surface is a good radiator

A) the polished vessel will cool faster because a polished surface is a good radiator

B) the polished vessel will cool faster because it will absorbe less heat from the room

B) the polished vessel will cool faster because it will absorbe less heat from the room

C) the black vessel will cool faster because it is a better conductor of heat

C) the black vessel will cool faster because it is a better conductor of heat

D) the polished vesselwill cool faster because it reflects heat better

D) the polished vesselwill cool faster because it reflects heat better

E) the black vessel will cool faster because a black surface radiates heat faster than a polished one

E) the black vessel will cool faster because a black surface radiates heat faster than a polished one

#35. The temperature at which the water vapour present in the air saturates the air and begins to condense is known as Options

A) boiling point

A) boiling point

B) melting point

B) melting point

C) triple point

C) triple point

D) dew point

D) dew point

E) critical temperature

E) critical temperature

#36. In what range of temperature is the expansion of water anomalous? Options

A) +208oC to +212oC

A) +208oC to +212oC

B) -80oC + -76oC

B) -80oC + -76oC

C) -4oC to 0oC

C) -4oC to 0oC

D) +96oC to +100oC

D) +96oC to +100oC

E) 0oC to +4oC

E) 0oC to +4oC

#37. Which of the following statements defines correctly the efficiency of a machine? Options

A) the load carried by the machine divided by effort required in carrying the load

A) the load carried by the machine divided by effort required in carrying the load

B) the distance moved by the load divided by the distance moved by the effort

B) the distance moved by the load divided by the distance moved by the effort

C) the useful work done by the machine divided by the total work put into the machine

C) the useful work done by the machine divided by the total work put into the machine

D) the movement of the load divided by the movement of the effort about the same point

D) the movement of the load divided by the movement of the effort about the same point

E) the temperature at the end of the application of the machine divided by the initial temperature

E) the temperature at the end of the application of the machine divided by the initial temperature

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