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