Physics Past Questions v3 (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

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Physics Past Questions v3 (JAMB/WAEC/NECO)

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#1. Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is

A) 0.30

A) 0.30

B) 0.60

B) 0.60

C) 1.67

C) 1.67

D) 2.33

D) 2.33

E) 2.36

E) 2.36

#2. In the diagram above, MN is perpendicular to ON and MR what is the difference between the moment about N of the force of 20 Newtons applied along MP an its moment about 0

A) Zero

A) Zero

B) 0.2N.m

B) 0.2N.m

C) 0.4N.m

C) 0.4N.m

D) 0.8N.m

D) 0.8N.m

E) 0.6N.m

E) 0.6N.m

#3. What is the total resistance in the above diagram

A) 5 ohms

A) 5 ohms

B) 15 ohms

B) 15 ohms

D) 35 ohms

D) 35 ohms

E) 45 ohms

E) 45 ohms

#4. The total capacitance of the circuit above is

A) 0.25mF

A) 0.25mF

B) 0.50mF

B) 0.50mF

C) 0.75mF

C) 0.75mF

D) 1.25mF

D) 1.25mF

E) 1.50mF

E) 1.50mF

#5. The diagram above shows the prism arrangement in a

A) Microscope

A) Microscope

B) tereoscope

B) tereoscope

C) projector

C) projector

D) periscope

D) periscope

#6. What is the acceleration of a particle whose motion is graphically displayed in the diagram above

A) 0.67ms-2

A) 0.67ms-2

B) 0.83-2

B) 0.83-2

C) 0.87-2

C) 0.87-2

D) 92-2

D) 92-2

#7. The activity of a radioactive substance depends on

A) temperature and purity

A) temperature and purity

B) temperature and age

B) temperature and age

C) purity and age

C) purity and age

D) age, purity and temperature

D) age, purity and temperature

E) none of the above

E) none of the above

#8. Natural radioactivity consists of the emission of

A) -particle and rays

A) -particle and rays

B) -particle and X-rays

B) -particle and X-rays

C) -rays and X-rays

C) -rays and X-rays

D) -particle, rays and -rays

D) -particle, rays and -rays

E) -particle, rays, -rays and X-rays

E) -particle, rays, -rays and X-rays

#9. the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is

A) 3

A) 3

B) 1.5

B) 1.5

C) 1.32

C) 1.32

D) 1

D) 1

E) 0.67

E) 0.67

#10. A man stands one-third of the way between two walls and claps his hands. He hears two distinct echoes 1s apart. If the speed of sound is 330ms-1, the distance between the wall is

A) 33m

A) 33m

B) 110m

B) 110m

C) 220m

C) 220m

D) 330m

D) 330m

E) 495m

E) 495m

#11. According to Ohm's law, the ratio V/I is constant for

A) an electrolyte

A) an electrolyte

B) a diode

B) a diode

C) a transistor

C) a transistor

D) silver

D) silver

E) all of the above

E) all of the above

#12. In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the

A) same in sign and quantity

A) same in sign and quantity

B) same in sign but greater

B) same in sign but greater

C) opposite in sign but greater

C) opposite in sign but greater

D) opposite in sign but less

D) opposite in sign but less

E) opposite in sign but equal

E) opposite in sign but equal

#13. High Tension(H.T.) transmission means

A) to transmit a given amount of power, the tension in the conducting wire must be high

A) to transmit a given amount of power, the tension in the conducting wire must be high

B) heat is not lost when current is passed through a conductor

B) heat is not lost when current is passed through a conductor

C) heat is gained when a given power is transmitted

C) heat is gained when a given power is transmitted

D) a big transformer is required to transmit power

D) a big transformer is required to transmit power

E) trasmission of power at low current and high voltage

E) trasmission of power at low current and high voltage

#14. The best material for the core of the primary and secondary coils of an induction coil is

A) copper, because it has a good conductor of electricity

A) copper, because it has a good conductor of electricity

B) steel, because it becomes magnetic and retains its magnetism for a long time

B) steel, because it becomes magnetic and retains its magnetism for a long time

C) rubber, because it is a good insulator and the user is prevented from shock

C) rubber, because it is a good insulator and the user is prevented from shock

D) soft iron, because it becomes magnetic but easily loses its magnetism

D) soft iron, because it becomes magnetic but easily loses its magnetism

E) glass, because it is transparent

E) glass, because it is transparent

#15. Which of the following elements is the best absorber of X-rays?

A) hydrogen

A) hydrogen

B) oxygen

B) oxygen

C) calcium

C) calcium

D) copper

D) copper

E) lead

E) lead

#16. A calorimeter of thermal capacity 80J contains 20g of water at 25oC. Water at 100oC is added so that the final temperature of the set-ups is 50oC. The amount of water added is (Heat capacity of water = 4.18J/g/oC)

A) 20g

A) 20g

B) 25g

B) 25g

C) 45g

C) 45g

D) 50g

D) 50g

E) 100g

E) 100g

#17. Heat is supplied to a block of ice 0o until half of it has melted. Which of the following statements is true?

A) the temperature rises and the ice exoa

A) the temperature rises and the ice exoa

B) the temperature remains constant and the volume of ice decreases

B) the temperature remains constant and the volume of ice decreases

C) the ice gives out heat as it melts

C) the ice gives out heat as it melts

D) the mass remains constant and the temperature increases

D) the mass remains constant and the temperature increases

#18. If the volume of a fixed mass of a gas is kept constant, the pressure of the gas

A) is inversely proprotional to its centigrade temperature

A) is inversely proprotional to its centigrade temperature

B) is inversely proportional to its absolute temperature

B) is inversely proportional to its absolute temperature

C) is directly proportional to its centigrade temperature

C) is directly proportional to its centigrade temperature

D) is directly proportional to its absolute temperature

D) is directly proportional to its absolute temperature

E) remains constant also

E) remains constant also

#19. Which of the following statements about sound is NOT true?

A) sound is a longitudinal wave

A) sound is a longitudinal wave

B) sound can be reflected and refracted like light

B) sound can be reflected and refracted like light

C) sound travels through a vacuum

C) sound travels through a vacuum

D) sound moves faster in a steel wire than in air

D) sound moves faster in a steel wire than in air

E) sound can ony be produced by vibrating objects

E) sound can ony be produced by vibrating objects

#20. In a compound microscope

A) there is only one lens

A) there is only one lens

B) the objective lens have a shorter focal length than the eyepiece which is convex

B) the objective lens have a shorter focal length than the eyepiece which is convex

C) the objective lens has a longer focal length than the eyepiece which is convex

C) the objective lens has a longer focal length than the eyepiece which is convex

D) the objective lens has a shorter focal length than the eyepiece which is concave

D) the objective lens has a shorter focal length than the eyepiece which is concave

E) the objective and the eyepiece are both convex and have the same focal length

E) the objective and the eyepiece are both convex and have the same focal length

#21. In sunlight, a blue flower looks blue because we see the flower by the light it

A) recieves from our eye

A) recieves from our eye

B) disperses

B) disperses

C) absorbs

C) absorbs

D) refracts

D) refracts

E) reflects

E) reflects

#22. A stand-by generator is connected to fifteen 40 W lamps and musician's 600 W amplifying system. How much energy is used if the generator runs for 6 hours?

A) 3.84k Wh

A) 3.84k Wh

B) 7.20k Wh

B) 7.20k Wh

C) 8.40k Wh

C) 8.40k Wh

D) 12.00k Wh

D) 12.00k Wh

E) 14.56k Wh

E) 14.56k Wh

#23. A tugboat is travelling from Asaba to Onitsha across the River Niger with a resultant velocity of 20 knots. If the river flows at 12 knots, the direction of motion of the boat relative to the direction of water flow is

A) 36.87oC

A) 36.87oC

B) 53.13oC

B) 53.13oC

C) 90oC

C) 90oC

D) 136oC

D) 136oC

E) 143.13oC

E) 143.13oC

#24. An object of mass m and volume v, is totally immersed in a liquid of density p. The tension of a string holding it is

A) mg

A) mg

B) (m + pv)g

B) (m + pv)g

C) (m - pv)g

C) (m - pv)g

D) pvg

D) pvg

E) [M/m-pv]g

E) [M/m-pv]g

#25. The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9, 19.3, 10.5. A metal ornament which weighs 0.425kg and can displace 50 x 10-6m3m of water is made of

A) zinc

A) zinc

B) brass

B) brass

C) copper

C) copper

D) gold

D) gold

E) silver

E) silver

#26. The name given to the characteristics behaviour of substances which set their length perpendicular to a strong magnetic field instead of in line with it is

A) magnetization

A) magnetization

B) paramagnetism

B) paramagnetism

C) diamagnetism

C) diamagnetism

D) demagnetism

D) demagnetism

E) ferromagnetism

E) ferromagnetism

#27. What is the relative permitivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads?

A) o

A) o

B) 2

B) 2

C) 8

C) 8

D) 32

D) 32

#28. If the magnification of a virtual image formed of an object 10cm from a convex lens is 3, then the focal length of the lens is

A) 10cm

A) 10cm

B) 15cm

B) 15cm

C) 16cm

C) 16cm

D) 19cm

D) 19cm

#29. A quantity of sungas at -133 occupies 1/3m3 under pressure 1.4 x 105 Nm-2. if the gas occupies 31 m-2 at 37oC, its pressure will be

A) 1.26 x 103Nm-2

A) 1.26 x 103Nm-2

B) 3.3 x104Nm-2

B) 3.3 x104Nm-2

C) 1.35 x 104Nm-2

C) 1.35 x 104Nm-2

D) 2.2 x 104Nm-2

D) 2.2 x 104Nm-2

E) 105Nm-2

E) 105Nm-2

#30. Which of the following does NOT cause a reduction of the surface tension of water?

A) soap solution

A) soap solution

B) detergent

B) detergent

C) alcohol

C) alcohol

D) camphor

D) camphor

E) grease

E) grease

#31. The water at the bottom of a waterfall is slightly warmer than that at the top because part of the

A) potential energy raises the water temperature

A) potential energy raises the water temperature

B) water absorbs latent heat from the atmosphere

B) water absorbs latent heat from the atmosphere

C) kinetic energy is changed intyo internal energy

C) kinetic energy is changed intyo internal energy

D) dropping mass of water increases the heat capacity

D) dropping mass of water increases the heat capacity

E) A and C above

E) A and C above

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