2016 JAMB PHYSICS PAST QUESTIONS AND ANSWERS Leave a Comment / Jamb Physics / By Jamb Tutor Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% Created by Jamb TutorJamb Physics 2016 JAMB PHYSICS PAST QUESTIONS AND ANSWERS 1 / 40 Category: JAMB Physics 2016 1. What is the least possible error encountered with a meter rule? a) 0.5 mm b) 1.0 mm c) 0.2 mm d) 0.1 mm The least error with a standard meter rule is 0.5 mm, the smallest division. 2 / 40 Category: JAMB Physics 2016 2. What happens to electromotive force in the secondary winding? a) Stabilizing b) Reducing c) Increasing d) Varying Electromotive force in the secondary winding can vary depending on the transformer setup. 3 / 40 Category: JAMB Physics 2016 3. Calculate the power of a pump lifting 5000 kg of water through 60 m in 15 minutes. a) $3.3 × 10^3$ $Js^{-1}$ b) $2.5 × 10^4$ $Js^{-1}$ c) $2.5 × 10^5$ $Js^{-1}$ d) $3.3 × 10^2$ $Js^{-1}$ Power = Work/Time. Work is determined using mass × g × height. Convert time to seconds. 4 / 40 Category: JAMB Physics 2016 4. What is the temperature change when 500 J heats 100 g of water? a) 12.1°C b) 2.1°C c) 1.2°C d) 0.1°C Use Q = mcΔT, where Q is heat, m is mass, c is specific heat of water, ΔT is temperature change. 5 / 40 Category: JAMB Physics 2016 5. Which particle cannot be deflected by electric or magnetic fields? a) Gamma rays b) Alpha particles c) Wave particles d) Beta particles Gamma rays are uncharged, so they are unaffected by electric or magnetic fields. 6 / 40 Category: JAMB Physics 2016 6. Under what conditions do gases conduct electricity? a) High pressure, low p.d. b) Low pressure, high p.d. c) Low pressure, low p.d. d) High pressure, high p.d. Gases conduct electricity best under low pressure and high potential difference, allowing ionization. 7 / 40 Category: JAMB Physics 2016 7. Why does dispersion occur when light passes through a prism? a) Defects in the glass b) High density of the glass c) Different speeds of colors d) Hidden colors in the glass Dispersion arises because different colors have different speeds in the glass, causing them to refract at varying angles. 8 / 40 Category: JAMB Physics 2016 8. What is the e.m.f. of the cell in the circuit with negligible internal resistance? a) 12 V b) 36 V c) 2 V d) 8 V Calculate based on the provided setup, considering resistance negligible. 9 / 40 Category: JAMB Physics 2016 9. Find the coefficient of static friction for a mass of 80kg pulled by 500N on rough ground. a) 0.6 b) 0.4 c) 1 d) 0.8 Coefficient = Force of friction / (Normal force), Normal force = mg, with g = 10 m/s² 10 / 40 Category: JAMB Physics 2016 10. What happens when weight 2P is added to P on a balanced plank? a) Move P nearer to O b) Move Q nearer to O c) Add weight to Q d) Move P farther from O To restore equilibrium, adjust the position of weights to balance torques. 11 / 40 Category: JAMB Physics 2016 11. How long does it take light to pass through a 0.9 cm thick glass plate (n=1.50)? a) $3.0 × 10^{-10}$ s b) $4.5 × 10^{-11}$ s c) $3.0 × 10^{-11}$ s d) $4.5 × 10^{-10}$ s Time = Thickness / Speed of light in glass; Speed = c / n, where c = $3.0 × 10^8$ m/s. 12 / 40 Category: JAMB Physics 2016 12. What is the purpose of a transformer in an a.c. radio set? a) Step up voltage b) Step down voltage c) Increase power to the radio d) Convert a.c. to d.c. Transformers in a.c. circuits typically step up or step down voltage depending on design. 13 / 40 Category: JAMB Physics 2016 13. What is the frequency of a photon emitted with 3.3 eV energy? a) $3.2 × 10^{53}$ Hz b) $3.1 × 10^{53}$ Hz c) $1.3 × 10^{53}$ Hz d) $8.0 × 10^{53}$ Hz Frequency = Energy / Planck’s constant (E = hf), where h = $6.63 × 10^{-34}$ J⋅s. Convert eV to Joules. 14 / 40 Category: JAMB Physics 2016 14. In a reaction, $^{235}U + n → ^{144}Ba + ^{90}Kr + 2X$, identify X. a) Electron b) Neutron c) Neutrino d) Proton The missing particles (X) are neutrons emitted during the fission process to maintain conservation. 15 / 40 Category: JAMB Physics 2016 15. How to shield a material from an external magnetic field? a) Soft iron ring b) Loop of copper wire c) Triangular zinc ring d) Square steel ring Soft iron is often used to create a protective shield from external magnetic influences. 16 / 40 Category: JAMB Physics 2016 16. What is the refractive index of a medium when critical angle is given? a) 2/√3 b) √3 c) 1/√3 d) 2√3 Refractive index is derived as 1/sin(critical angle) based on Snell’s law for total internal reflection. 17 / 40 Category: JAMB Physics 2016 17. What condition defines thermal equilibrium? a) Heat capacities equal b) Quantities of heat equal c) Temperatures are equal d) Heat flow between objects Thermal equilibrium exists when objects have the same temperature, with no net heat flow between them. 18 / 40 Category: JAMB Physics 2016 18. Which is a characteristic of stationary waves? a) Antinode minimum displacement b) Successive nodes = λ c) Can be transverse d) Formed by identical waves Stationary waves are formed by two identical waves traveling in opposite directions, forming nodes and antinodes. 19 / 40 Category: JAMB Physics 2016 19. What is atmospheric pressure at 20km height above ground? a) 480 mmHg b) 570 mmHg c) 190 mmHg d) 380 mmHg Atmospheric pressure decreases with altitude, calculated using barometric pressure equations. 20 / 40 Category: JAMB Physics 2016 20. Calculate the heat capacity of a metal heated to 100°C and placed in a calorimeter. a) 92 J/kg b) 286 J/kg⋅K c) 133 J/kg⋅K d) 887 J/kg⋅K Use Q = mcΔT for water-metal calorimetry system, solving for c of the metal. 21 / 40 Category: JAMB Physics 2016 21. Find the effective voltage in a series a.c circuit with p.d across the inductor as 8 V. a) 10 V b) 2 V c) 14 V d) 48 V Effective voltage combines individual voltage drops via vector sum or Pythagoras, depending on phase relationships. 22 / 40 Category: JAMB Physics 2016 22. Where is the antinode produced in a closed organ pipe? a) Closed end b) Middle c) Open end d) All parts In closed organ pipes, antinodes always form at the open end, while nodes form at the closed end. 23 / 40 Category: JAMB Physics 2016 23. What happens to latent heat during the melting of ice to water at 0°C? a) Latent heat absorbed, mass ↓ b) Latent heat absorbed, volume ↓ c) Latent heat given out, mass ↑ d) Latent heat given out, volume ↑ Latent heat is absorbed to overcome molecular bonds, mass remains constant, and volume decreases slightly due to density change. 24 / 40 Category: JAMB Physics 2016 24. What is the correct relationship between vectors P, Q, and R in the diagram? a) P = Q + R b) P = Q – R c) P = R – Q d) P + Q + R = 0 Using vector addition principles: P + Q + R = 0 when vectors form a closed triangle. 25 / 40 Category: JAMB Physics 2016 25. What happens when two parallel conductors carry currents in the same direction? a) Repel each other b) Attract each other c) Move in same direction d) No effect Currents in the same direction attract due to the interaction of magnetic fields. Opposite currents repel. 26 / 40 Category: JAMB Physics 2016 26. Why does a green leaf appear green in bright daylight? a) Absorbs only green b) Absorbs all except green c) Reflects only green d) Absorbs none The leaf reflects green light and absorbs other wavelengths in sunlight, making it appear green. 27 / 40 Category: JAMB Physics 2016 27. Which factor does NOT affect the e.m.f of a primary cell? a) Nature of plates b) Size of cell c) Temperature d) Nature of electrolyte The size of the cell does not influence the e.m.f, which depends on the electrode materials and electrolyte. 28 / 40 Category: JAMB Physics 2016 28. What phenomenon amplifies the sound of a tuning fork in contact with a wooden box? a) Beats b) Echoing c) Reverberation d) Resonance Resonance amplifies the sound as the box vibrates at the fork’s natural frequency, enhancing the sound waves. 29 / 40 Category: JAMB Physics 2016 29. Find the velocity of the second particle when the first (m,v) splits from rest. a) MV/M b) MV/(M – m) c) MV/(M + m) d) MV/(M – M) Using momentum conservation: m₁v₁ = m₂v₂, derive v₂ for the second particle. 30 / 40 Category: JAMB Physics 2016 30. How much current deposits 36 g of silver in 5 minutes? (z = 0.0012 g/C) a) 6000 A b) 100 A c) 50 A d) 1:00 AM Use Q = It and m = zQ to find I; solve for I using silver’s electrochemical equivalent. 31 / 40 Category: JAMB Physics 2016 31. What principle governs the operation of an induction coil? a) Ohm's law b) Ampere's law c) Faraday's law d) Coulomb's law Faraday’s law explains electromagnetic induction, where a changing magnetic field induces an electromotive force in a coil. 32 / 40 Category: JAMB Physics 2016 32. How many atoms disintegrate after three half-lives if the initial count is N? a) (7N)/8 b) (3N)/8 c) (5N)/8 d) N/8 Each half-life reduces the remaining atoms by half. After three half-lives, (7/8) of the atoms will have disintegrated. 33 / 40 Category: JAMB Physics 2016 33. Why is mercury a suitable barometric fluid? a) Expands uniformly b) Several times denser than water c) Opaque d) Good conductor of heat Mercury’s high density allows for shorter column lengths compared to other liquids, making it ideal for barometers. 34 / 40 Category: JAMB Physics 2016 34. Which is NOT a characteristic of natural radioactivity? a) Radioactivity is nuclear b) Occurs only in mass > 206 c) Affected by magnetic fields d) Emits α, β, γ rays Radioactivity occurs in some elements regardless of mass number, although it is common in heavy nuclei. 35 / 40 Category: JAMB Physics 2016 35. How is inertia correctly described? a) Reluctance to start or stop moving b) Reluctance to stop moving c) Readiness to start moving d) Reluctance to stop, readiness to move Inertia is an object’s resistance to changes in its motion or rest, proportional to its mass. 36 / 40 Category: JAMB Physics 2016 36. What is the force on a charge of 0.2 C in an electric field of intensity 4 N/C? a) 0.8 N/C b) 20 N/C c) 0.8 d) 4.2 N/C Force is calculated using F = qE, where q is charge and E is electric field intensity. 37 / 40 Category: JAMB Physics 2016 37. What is the point where a spring does not return to its original length? a) Breaking point b) Spring constant c) Elastic limit d) Elasticity point The elastic limit is the maximum stretch or stress a material can withstand without permanent deformation. 38 / 40 Category: JAMB Physics 2016 38. What describes a real image formed by a concave mirror? a) I, II, III only b) I, II, IV only c) I, III only d) I, II only A real image is inverted, can be projected onto a screen, and forms at the convergence of actual light rays. 39 / 40 Category: JAMB Physics 2016 39. Which substance does NOT reduce the surface tension of water? a) Soap solution b) Detergent c) Alcohol d) Grease Grease does not dissolve in water, so it does not disrupt intermolecular forces that create surface tension. 40 / 40 Category: JAMB Physics 2016 40. At what temperature range does water expand anomalously? a) +208°C to +212°C b) -800°C to -76°C c) 0°C to 4°C d) -4°C to 0°C Water expands anomalously between 0°C and 4°C as it transitions from ice to liquid, becoming denser before expanding again. Your score is The average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Anonymous feedback Send feedback
