Physics Past Questions v6 (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

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Physics Past Questions v6 (JAMB/WAEC/NECO)

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#1. Which of the following may be used to determine relative humidity in a physics laboratory? I. Manometer II. Wet-and-dry bulb hygrometer III. Hair hygrometer IV. A hydrometer.

A) III only

A) III only

B) I only

B) I only

C) II only

C) II only

D) II and III only

D) II and III only

#2. In a resonance tube experiment, a tube of fixedlength in closed at one end and several turningforks of increasing frequency used to obtainresonance at the open end. If the turning fork withthe lowest frequency which gave resonance had a frequency ƒ1 and the next turning fork to giveresonance had a frequency ƒ2, find the ratio ƒ2/ ƒ1.

A) 2

A) 2

B) 3

B) 3

C) 1/2

C) 1/2

D) 8

D) 8

#3. A short response time is obtained in a liquid-in-glass thermometer when the

A) bulb is large and thick-walled

A) bulb is large and thick-walled

B) bulb is small and thick-walled

B) bulb is small and thick-walled

C) stem is long and thin

C) stem is long and thin

D) liquid is of high density and the bulb is large

D) liquid is of high density and the bulb is large

E) bulb is thin-walled and the liquid is a good conductor of heat.

E) bulb is thin-walled and the liquid is a good conductor of heat.

#4. Four resistors R1, R2, R3 and R4 are connected in series as shown above, V1, V2, V3 are voltmeters connected as indicated above. Which of the following relations is correct??

A) V1 = V3 =V2/2

A) V1 = V3 =V2/2

B) V1 = 2V2 = V3

B) V1 = 2V2 = V3

C) V1=1/2V3 =V3

C) V1=1/2V3 =V3

D) V2 - V1 = V3

D) V2 - V1 = V3

#5. In the Figure above, QR is a vertical conductor and the current I flows from R to Q, P is a point on the horizontal plane and is to the south of the wire. The direction of the magnetic field at P due to the current is

A) Upward

A) Upward

B) North

B) North

C) South

C) South

D) West

D) West

E) East

E) East

#6. Each of the figures in the diagram above represent two current carrying conductors situated close to each other. In which two diagrams, are the forces between the two wires attractive

A) I and V

A) I and V

B) I and II

B) I and II

C) II and IV

C) II and IV

D) II and V

D) II and V

E) III and IV

E) III and IV

#7. Which of the following figures gives the correct resultant R of two vectors P and Q?

A) I

A) I

B) II

B) II

C) III

C) III

D) IV

D) IV

E) V

E) V

#8. The diagram above shows three circuits, the internal resistances of the batteries are negligible. which of the currents is the largest

A) I1

A) I1

B) I2

B) I2

C) I3

C) I3

D) I4

D) I4

E) I5

E) I5

#9. he image above shows an inverted U-tube with the open end, O of one limb below the level, W of water in the tank, in order that water should begin to flow from the tank it is is necessary that

A) The U-tube is completely filled with water and that P should be higher that W

A) The U-tube is completely filled with water and that P should be higher that W

B) P should be lower than O and W

B) P should be lower than O and W

C) P should be lower than W and O should reach the botton of the table

C) P should be lower than W and O should reach the botton of the table

D) The U-tube is completely filled with water and that P should be lower that W

D) The U-tube is completely filled with water and that P should be lower that W

#10. Which of the following may be used to determine the relative humidity in a physics laboratory I. Manometer II. Wet-and-Dry Bulb Hygrometer III. Hair Hygrometer IV. A Hydrometer

A) I Only

A) I Only

B) II and III Only

B) II and III Only

C) II Only

C) II Only

D) III Only

D) III Only

#11. Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

A) heat light sound kinetic

A) heat light sound kinetic

B) kinetic light heat electricity

B) kinetic light heat electricity

C) heat kinetic electricity heat light

C) heat kinetic electricity heat light

D) electricity kinetic heat v light

D) electricity kinetic heat v light

E) heat sound kninetic v electricity

E) heat sound kninetic v electricity

#12. If the force of a charge of 0.2 coulomb in an electric field is 4N, then the electric field intensity of the field is

A) 0.8

A) 0.8

B) 0.8N/C

B) 0.8N/C

C) 20.0N/C

C) 20.0N/C

D) 4.2N/C

D) 4.2N/C

E) 20.0N/C

E) 20.0N/C

#13. The specific latent heat of vaporization of a substance is always

A) less than its specific latent heat of fusion

A) less than its specific latent heat of fusion

B) greater than its specific heat of fusion

B) greater than its specific heat of fusion

C) equal to its specific latent heat of fusion

C) equal to its specific latent heat of fusion

D) all of the above depending on the nature of the substance

D) all of the above depending on the nature of the substance

E) none of the above

E) none of the above

#14. Longitudinal waves do not exhibit

A) Refraction

A) Refraction

B) Reflection

B) Reflection

C) Diffraction

C) Diffraction

D) Polarization

D) Polarization

E) Rarefaction

E) Rarefaction

#15. A short response to time is obtained in liquid-in-glass thermometer when the

A) bulb is large and thick-walled

A) bulb is large and thick-walled

B) stem is long and thin

B) stem is long and thin

C) bulb is small and thicked-walled

C) bulb is small and thicked-walled

D) liquid is of high density and the bore is large

D) liquid is of high density and the bore is large

E) bulb is thin-walled and the liquid is a good conductor of heat

E) bulb is thin-walled and the liquid is a good conductor of heat

#16. A machine has a velocity ratio of 5. It requires a 50kg weight to overcome a 200kg weight. The efficiency is

A) 4%

A) 4%

B) 5%

B) 5%

C) 40%

C) 40%

D) 50%

D) 50%

E) 80

E) 80

#17. If the normal atmospheric pressure in a laboratory supports a column of mercury 0.76m high and the relative density of mercury is 13.8, then the height of water column which atmospheric pressure will support in the same laboratory at the same time is

A) 0m

A) 0m

B) 10m

B) 10m

C) 13m

C) 13m

D) 14m

D) 14m

E) 18m

E) 18m

#18. An electric current of 3Aflowing through an electric heating elements of resistance 20 embedded in 1,000g of an oil raises the temperature of the oil by 10oC in 10 seconds then the specific heat capacity of the oil is

A) 1.8Jg-1oC

A) 1.8Jg-1oC

B) 0.6Jg-1oC

B) 0.6Jg-1oC

C) 0.18Jg-1oC

C) 0.18Jg-1oC

D) 18Jg-1oC

D) 18Jg-1oC

E) 0.06Jg-1oC

E) 0.06Jg-1oC

#19. The difference of potential between the terminals of cells is 2.2 volts. When a 4ohm resistor is connected across the terminals of this cells, the potential difference is 2 volts. What is the internal resistance of the cell?

A) 0.10 ohms

A) 0.10 ohms

B) 0.25ohms

B) 0.25ohms

C) 0.40ohms

C) 0.40ohms

D) 2.50ohms

D) 2.50ohms

E) 4.00ohms

E) 4.00ohms

#20. Of the following derived units, the one that is not a unit of power is

A) joule/second

A) joule/second

B) ampere volt

B) ampere volt

C) ampere2/volt

C) ampere2/volt

D) ohm2/volt

D) ohm2/volt

E) volts2

E) volts2

#21. a force of 16N applied 4.0kg block that is at rest on a smooth, horizontal surface. What is the velocity of the block at t = 5 seconds?

A) 4ms-1

A) 4ms-1

B) 10ms-1

B) 10ms-1

C) 20ms-1

C) 20ms-1

D) 50ms-1

D) 50ms-1

E) 80ms-1

E) 80ms-1

#22. 1,000 identical drops of oil of density 500kgm-3 have a total mass of 5 x 10-4kg. One of the drops forms a thin film of area 0.5m2 on water. The thickness of the film is

A) 2 x 10-8m

A) 2 x 10-8m

B) 2 x 10-9m

B) 2 x 10-9m

C) 2 x 10-7m

C) 2 x 10-7m

D) 3 x 10-9m

D) 3 x 10-9m

E) 2.8 x 10-8m

E) 2.8 x 10-8m

#23. The total length of a spring when a mass of 20g is hung from its end is 14cm, while its total length is 16cm when a mass of 30g is hung from the same end. Calculate the unstretched length of the spring assuming Hooke's law is obeyed.

A) 9.33cm

A) 9.33cm

B) 10.00cm

B) 10.00cm

C) 10.66cm

C) 10.66cm

D) 12.00cm

D) 12.00cm

E) 15.00cm

E) 15.00cm

#24. Which of the following statements is CORRECT? i. the mass number is equal to the total number of protons and electrons in an atom. ii. the atomic number is equal to the number of protons in an atom. iii. the number of electrons in an atom is equal to the total number of protons and neutrons in the nucleus.

A) i only

A) i only

B) ii only

B) ii only

C) iii only

C) iii only

D) i and ii only

D) i and ii only

E) ii and iii only

E) ii and iii only

#25. The linear expansivity of brass is 2 x 10-5oC-1. If the volume of a piece of brass is 10cm3 at 0oC, what will be its volume at 100oC?

A) 10.02cm3

A) 10.02cm3

B) 10.04cm3

B) 10.04cm3

C) 10.06cm3

C) 10.06cm3

D) 10.20cm3

D) 10.20cm3

E) 102.00cm3

E) 102.00cm3

#26. A 24V potential difference is applied across a parallel combination of four 6-ohms resistor, The current in each resistor is

A) 1A

A) 1A

B) 4A

B) 4A

C) 16A

C) 16A

D) 18A

D) 18A

E) 36A

E) 36A

#27. The electrochemical equivalent of a metal is 0.126 x 10-6 kgC-1. The mass of the metal that a current of 5A will deposit from a suitable bath in 1 hour is

A) 0.0378 x 10 -3kg

A) 0.0378 x 10 -3kg

B) 0.227 x 10 -3kg

B) 0.227 x 10 -3kg

C) 0.378 x 10 -3kg

C) 0.378 x 10 -3kg

D) 0.595 x 10 -3kg

D) 0.595 x 10 -3kg

E) 2.268 x 10 -3kg

E) 2.268 x 10 -3kg

#28. Ripples on water are similar to light waves in that they both

A) have the same wavelength

A) have the same wavelength

B) are longitudinal

B) are longitudinal

C) cannot be reflected

C) cannot be reflected

D) travel at the same speed

D) travel at the same speed

E) can be refracted and diffracted

E) can be refracted and diffracted

#29. A piece of wood is floating on water. The forces acting on the wood are

A) upthrust and reaction

A) upthrust and reaction

B) weight and reaction

B) weight and reaction

C) weight and upthrust

C) weight and upthrust

D) upthrust and viscousity

D) upthrust and viscousity

E) weight and viscousity

E) weight and viscousity

#30. A train has an initial velocity of 44ms-1 and an acceleration of -4ms-1. Its velocity after 10 seconds is

A) 2ms-1

A) 2ms-1

B) 4ms-1

B) 4ms-1

C) 8ms-1

C) 8ms-1

D) 12ms-1

D) 12ms-1

E) 16ms-1

E) 16ms-1

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