2013 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 2013 JAMB PHYSICS PAST QUESTIONS AND ANSWERS 1 / 49 Category: JAMB Physics 2013 1. Which Question Paper Type of Physics is given to you? a) Type D. b) Type I. c) Type B. d) Type U. Students identify the given question paper type, marked as one of the provided options. 2 / 49 Category: JAMB Physics 2013 2. Effect of taking a brick to the moon: What happens to its mass? a) Remains constant. b) Reduces. c) Increases. d) Becomes zero. Mass remains constant as it is independent of location, unlike weight which depends on gravitational force. 3 / 49 Category: JAMB Physics 2013 3. Resultant of two perpendicular forces, one making $30°$ with resultant, is $50$ N. Find the magnitude of the force. a) $100.0$ N. b) $57.7$ N. c) $43.3$ N. d) $25.0$ N. Using vector resolution, solve for the perpendicular force using trigonometry. 4 / 49 Category: JAMB Physics 2013 4. Which pair of physical quantities are scalar only? a) Volume and area. b) Moment and momentum. c) Length and displacement. d) Impulse and time. Scalars have magnitude only. Volume and area qualify as they lack directional components. 5 / 49 Category: JAMB Physics 2013 5. Period of pendulum: Length doubled (0.8 m), initial period 2 s. Find new period. a) $8$ s. b) $4$ s. c) $2\sqrt{2}$ s. d) $\sqrt{2}$ s. Period $T \propto \sqrt{L}$. If $T_1 = 2$ and $L_2 = 2L_1$, $T_2 = 2\sqrt{2}$. 6 / 49 Category: JAMB Physics 2013 6. Train deceleration (initial velocity = 20 m/s, acceleration = -2 m/s²). Time to halt? a) $5$ s. b) $10$ s. c) $20$ s. d) $40$ s. Time $t = \frac{v}{a}$: $t = \frac{20}{2} = 10$ s. 7 / 49 Category: JAMB Physics 2013 7. Apparent weight loss (weight = 70 kg, elevator acceleration = -1.5 m/s²). a) $686$ N. b) $595$ N. c) $581$ N. d) $1105$ N. Weight apparent $W_a = mg – ma$: $W_a = (70)(10 – 1.5) = 595$ N. 8 / 49 Category: JAMB Physics 2013 8. Fraction of cork immersed (density of cork = $0.25 \times 10^3$ kg/m³, liquid = $1.25 \times 10^3$ kg/m³)? a) $0.8$ b) $0.5$ c) $0.2$ d) $0.1$ Fraction immersed = $\frac{\text{Density of cork}}{\text{Density of liquid}} = \frac{0.25}{1.25} = 0.2$. 9 / 49 Category: JAMB Physics 2013 9. Height of object for potential energy to equal kinetic energy of 5 m/s body? a) $25.0$ m. b) $20.0$ m. c) $1.3$ m. d) $1.0$ m. KE = PE, $\frac{1}{2}mv^2 = mgh \to h = \frac{v^2}{2g} = \frac{5^2}{2(10)} = 1.25$ m. 10 / 49 Category: JAMB Physics 2013 10. Power of pump lifting 5000 kg water through 60 m in 15 min? a) $2.5 \times 10^5$ W. b) $2.5 \times 10^4$ W. c) $3.3 \times 10^3$ W. d) $3.3 \times 10^2$ W. Power $P = \frac{Work}{time}$: $P = \frac{(5000)(10)(60)}{15 \times 60} = 3.3 \times 10^4$ W. 11 / 49 Category: JAMB Physics 2013 11. Coefficient of friction between two perfectly smooth surfaces is? a) Infinity. b) One. c) Half. d) Zero. Perfectly smooth surfaces lack friction, so the coefficient of friction is zero. 12 / 49 Category: JAMB Physics 2013 12. Effort needed by machine (efficiency = 90%, effort arm = 2× load arm, load = 180 N)? a) $80$ N. b) $90$ N. c) $100$ N. d) $120$ N. Effort $E = \frac{Load \times Load Arm}{Effort Arm \times Efficiency}$: $E = \frac{180}{2 \times 0.9} = 100$ N. 13 / 49 Category: JAMB Physics 2013 13. Work done by force of 20 N stretching spring by 50 mm? a) $0.5$ J. b) $1.5$ J. c) $2.0$ J. d) $2.5$ J. Work done $W = \frac{1}{2} k x^2 \to W = F \times d$: $W = 20 \times 0.05 = 1.0$ J. 14 / 49 Category: JAMB Physics 2013 14. Depth for pressure change of 1 atmosphere (Density = 1013 kg/m³, g = 10 m/s²)? a) $0.1$ m. b) $1.0$ m. c) $10.0$ m. d) $100.0$ m. Pressure $P = h \rho g \to h = \frac{P}{\rho g} \to h = \frac{1 \times 10^5}{1013 \times 10} \approx 10$ m. 15 / 49 Category: JAMB Physics 2013 15. Volume of alcohol with the same mass as 4.2 m³ of petrol (density of petrol = 0.7 g/cm³, alcohol = 0.6 g/cm³)? a) $0.8$ m³. b) $1.4$ m³. c) $3.6$ m³. d) $4.9$ m³. Mass of petrol $M = \rho V \to$ Volume of alcohol $V = \frac{M}{\rho_{alcohol}} \to V = \frac{0.7 \times 4.2}{0.6} = 4.9$ m³. 16 / 49 Category: JAMB Physics 2013 16. Temperature length (Length = 400 mm, steam point = 100°C, temp = 20°C). a) $20$ mm. b) $30$ mm. c) $60$ mm. d) $80$ mm. Length at 20°C = $\frac{20}{100} \times 400 = 80$ mm. 17 / 49 Category: JAMB Physics 2013 17. Length of wire at -10°C (Length = 100 m, linear expansivity = $2\times10^{-5}$/°C)? a) $100.08$ m. b) $100.04$ m. c) $99.96$ m. d) $99.92$ m. Length change $\Delta L = L \alpha \Delta T \to L_{new} = L + \Delta L \to 100 – (100 \times 2 \times 10^{-5} \times 40) = 99.92$ m. 18 / 49 Category: JAMB Physics 2013 18. Work done by gas expanding from 0.6 m³ to 1.2 m³ at $10^5$ N/m²? a) $7.0 \times 10^6$ J. b) $6.0 \times 10^6$ J. c) $6.0 \times 10^5$ J. d) $6.0 \times 10^4$ J. Work $W = P \Delta V \to W = (10^5)(1.2 – 0.6) = 6 \times 10^4$ J. 19 / 49 Category: JAMB Physics 2013 19. Ratio of specific heat capacities if temp rise in X is twice that of Y? a) 2:01 b) 1:02 c) 4:01 d) 1:04 Since $Q = mc\Delta T$, ratio of $c_Y/c_X = 2:1$ as $\Delta T_X = 2\Delta T_Y$. 20 / 49 Category: JAMB Physics 2013 20. Why food cooks quicker in saltwater than pure water? a) Dissolved substances on boiling point. b) Atmospheric pressure on boiling point. c) Food nutrients on thermal energy. d) Salts on thermal conductivity of water. Dissolved salts elevate boiling point, allowing higher cooking temperatures. 21 / 49 Category: JAMB Physics 2013 21. Why steam burns are more damaging than boiling water burns? a) Water has high specific heat. b) Steam has latent heat of fusion. c) Steam is hotter than water. d) Steam transfers heat more efficiently. Steam releases additional latent heat of vaporization upon contact, causing more severe burns. 22 / 49 Category: JAMB Physics 2013 22. Effect on boiling point of water at 30 m below sea level? a) More than 100°C. b) Less than 100°C. c) Exactly 100°C. d) Fluctuating temperature. Increased pressure below sea level raises boiling point above 100°C. 23 / 49 Category: JAMB Physics 2013 23. Cause of liquid rise/fall in narrow tubes? a) Surface tension. b) Friction with tube walls. c) Osmotic pressure. d) Viscosity of the liquid. Surface tension allows the liquid to rise or fall, depending on its adhesive/cohesive properties with the tube material. 24 / 49 Category: JAMB Physics 2013 24. Heat transfer mechanism through molecule vibration? a) Convection. b) Conduction. c) Radiation. d) Diffusion. Conduction occurs through molecule vibration and transfer of kinetic energy in solids. 25 / 49 Category: JAMB Physics 2013 25. Wave traveling through stretched string type? a) Electromagnetic wave. b) Microwave. c) Mechanical wave. d) Seismic wave. Mechanical waves require a material medium to propagate, such as tension in a string. 26 / 49 Category: JAMB Physics 2013 26. Difference between transverse and longitudinal waves? a) Frequency. b) Amplitude. c) Direction of vibration. d) Vibration period. The main difference is the direction of vibration relative to wave propagation. 27 / 49 Category: JAMB Physics 2013 27. Velocity of sound at 100°C (velocity at 0°C = 340 ms⁻¹)? a) $497$ m/s. b) $440$ m/s. c) $397$ m/s. d) $240$ m/s. Sound velocity increases with temperature $v = v_0 + 0.6T \to v = 340 + (0.6 \times 100) = 400$ m/s. 28 / 49 Category: JAMB Physics 2013 28. Fifth overtone frequency of sonometer with fundamental frequency of 450 Hz? a) $2700$ Hz. b) $900$ Hz. c) $450$ Hz. d) $2250$ Hz. Fifth overtone is the sixth harmonic: $f_6 = 6f_1 = 6 \times 450 = 2700$ Hz. 29 / 49 Category: JAMB Physics 2013 29. Height of man’s image on pinhole camera screen (Man = 1.5 m tall, distance = 3 m, screen = 0.1 m)? a) $0.05$ m. b) $0.15$ m. c) $0.30$ m. d) $1.00$ m. Using magnification: $\frac{Image Height}{Object Height} = \frac{Screen Distance}{Object Distance} \to h = \frac{1.5 \times 0.1}{3} = 0.05$ m. 30 / 49 Category: JAMB Physics 2013 30. Angle of reflection of ray through center of curvature of concave mirror? a) 0°. b) 45°. c) 90°. d) 180°. A ray passing through the center of curvature retraces its path, forming a 0° angle with the normal. 31 / 49 Category: JAMB Physics 2013 31. Incident angle when light passes into a medium with given refractive indices? a) 41°. b) 49°. c) 55°. d) 61°. Using Snell’s law, $n_1 \sin \theta_1 = n_2 \sin \theta_2 \to \theta_1 = \arcsin(\frac{n_2 \sin \theta_2}{n_1})$. 32 / 49 Category: JAMB Physics 2013 32. Conditions for total internal reflection to occur? a) Water to air. b) Water to glass. c) Glass to air. d) Glass to water. Light must travel from a denser to a less dense medium and the angle of incidence exceeds the critical angle. 33 / 49 Category: JAMB Physics 2013 33. System in optical diagram (e.g., microscope/telescope)? a) Telescope in normal use. b) Microscope in normal use. c) Telescope in abnormal use. d) Microscope in abnormal use. The configuration represents a telescope with inverted orientation in normal use. 34 / 49 Category: JAMB Physics 2013 34. Angular magnification of compound microscope (objective = 4, eyepiece = 7)? a) 2 b) 3 c) 11 d) 28 Angular magnification $M = M_{objective} \times M_{eyepiece} \to M = 4 \times 7 = 28$. 35 / 49 Category: JAMB Physics 2013 35. Order of color deviation in prism dispersion? a) Red → Green → Blue. b) Green → Violet → Blue. c) Blue → Red → Green. d) Blue → Green → Red. Deviation increases with wavelength: red < green < blue. 36 / 49 Category: JAMB Physics 2013 36. Force on an electron in an electric field (charge = $1.5 \times 10^{-19}$C, field = $10^5$V/m)? a) $1.5 \times 10^{-11}$ N. b) $1.5 \times 10^{-12}$ N. c) $1.5 \times 10^{-13}$ N. d) $1.5 \times 10^{-14}$ N. Using $F = qE$, substitute $q = 1.5 \times 10^{-19}$, $E = 10^5$ to find $F = 1.5 \times 10^{-14}$ N. 37 / 49 Category: JAMB Physics 2013 37. Role of capacitors in induction coils? a) Control circuits. b) Dissipate energy. c) Prevent electric sparks. d) Prevent field distortion. Capacitors help prevent electric sparks by absorbing voltage spikes in circuits. 38 / 49 Category: JAMB Physics 2013 38. Internal resistance of cell (e.m.f = 1.5V, external resistance = 1Ω, current = 0.3A)? a) $4.0$ Ω. b) $3.0$ Ω. c) $1.5$ Ω. d) $1.0$ Ω. Using $V = IR + Ir$, rearrange to find internal resistance: $r = \frac{V – IR}{I} \to r = 1.0$ Ω. 39 / 49 Category: JAMB Physics 2013 39. Materials obeying Ohm’s law (linear V-I relationship)? a) Electrolytes. b) Metals. c) Diode. d) Glass. Ohm’s law applies to metals and other materials with consistent resistance under constant conditions. 40 / 49 Category: JAMB Physics 2013 40. Cost of running ten 40W bulbs and five 100W bulbs for 10 hours at ₦5/unit? a) ₦90. b) ₦50. c) ₦45. d) ₦40. Total power = $(10 \times 40 + 5 \times 100)$ W, time = 10 h. Calculate energy (kWh) and multiply by cost per unit. 41 / 49 Category: JAMB Physics 2013 41. Maximum current for device rated 2000W, 250V? a) $9$ A. b) $8$ A. c) $7$ A. d) $6$ A. Using $I = \frac{P}{V}$, substitute $P = 2000$ W and $V = 250$ V to find $I = 8$ A. 42 / 49 Category: JAMB Physics 2013 42. Energy changes as charge moves through circuit under electric force? a) Gains both potential and kinetic energy. b) Gains potential and loses kinetic energy. c) Loses potential and gains kinetic energy. d) Loses both potential and kinetic energy. Charge gains kinetic energy while losing potential energy due to work done against the field. 43 / 49 Category: JAMB Physics 2013 43. Galvanometer to voltmeter conversion? a) High resistance in series. b) High resistance in parallel. c) Low resistance in series. d) Low resistance in parallel. A high resistance connected in series with the galvanometer increases its range to measure voltage. 44 / 49 Category: JAMB Physics 2013 44. Substance deposited by 4A current for 4.8 hours, given 2.5A deposits 1.8g in 3 hours? a) $2.4$ g. b) $3.2$ g. c) $4.6$ g. d) $4.8$ g. Mass deposited is proportional to current and time: $m = \frac{I_t}{I_0 t_0} \times m_0 \to m = 4.6$ g. 45 / 49 Category: JAMB Physics 2013 45. Energy at third atomic level if ground state = -24 eV? a) $-9.20$ eV. b) $-8.20$ eV. c) $-2.75$ eV. d) $-1.75$ eV. Energy at level $n = \frac{E_1}{n^2} \to E = \frac{-24}{3^2} = -2.75$ eV. 46 / 49 Category: JAMB Physics 2013 46. Photoelectrons ejected depends on? a) Frequency of beam. b) Work function of metal. c) Threshold frequency of metal. d) Intensity of beam. The number of photoelectrons is proportional to the intensity of the light beam incident on the surface. 47 / 49 Category: JAMB Physics 2013 47. Effect demonstrating particle nature of light? a) Photoelectric effect. b) Speed of light. c) Colors of light. d) Diffraction of light. Photoelectric effect demonstrates light’s particle nature as energy is transferred in discrete photons. 48 / 49 Category: JAMB Physics 2013 48. Photon energy for wavelength $10^{-10}$ m ($h = 6.63 \times 10^{-34}$, $c = 3.0 \times 10^8$)? a) $2.0 \times 10^{-15}$ J. b) $1.7 \times 10^{-13}$ J. c) $2.0 \times 10^{-12}$ J. d) $1.7 \times 10^{-12}$ J. Using $E = \frac{hc}{\lambda}$, substitute values to find $E = 2.0 \times 10^{-15}$ J. 49 / 49 Category: JAMB Physics 2013 49. Bond type between silicon and germanium? a) Dative. b) Covalent. c) Trivalent. d) Ionic. Covalent bonding forms due to shared electrons between silicon and germanium. Your score is The average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Anonymous feedback Send feedback
