Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 881: a tap supplies water at 26^oC while another supplies water at 82^oC. If a man wishes to bathe with water at 40^oC the ratio of hot mass of hot water to that of cold water required is Options:
  A) 1:3
  B) 3:1
  C) 3:7
  D) 7:3
  E) 15:8
  Show Answer
  The correct answer is A .
• Question 882:

  The equilibrium position of objects in any field corresponds to situation of

  Options:
  A) equipotential energy
  B) maximum potential energy
  C) minimum potential energy
  D) maximum kinetic energy
  Show Answer
  The correct answer is C .
• Question 883:

  A safety precaution designed to prolong the life of a lead acid accumulator is

  Options:
  A) By topping up the cells with concentrated acid
  B) The use of naked flame when charging the battery
  C) Keeping the specific gravity of the electrolyte within specified range
  D) By connecting wires to the terminals directly when testing the level of charging
  Show Answer
  The correct answer is C .
• Question 884: The wavelength of a wave traveling with a velocity of 420 ms^-1 is 42 m. what is its period? Options:
  A) 1.2 s
  B) 1.0 s
  C) 0.5 s
  D) 0.1 s
  Show Answer
  The correct answer is D .
• Question 885: The temperature at which the water vapour present in the air is just sufficient to saturate it is called the Options:
  A) ice point
  B) boiling point
  C) steam point
  D) dew point
  E) saturation point
  Show Answer
  The correct answer is D .
• Question 886: A cube of side 10cm and mass 0.5kg floats in a liquid with only $\frac{1}{5}$ of its height above the liquid surface. What is the relative density of the liquid? Options:
  A) 0.125cm^-1
  B) 0.250gcm^-1
  C) 0.625cm^-1
  D) 2.500cm^-1
  Show Answer
  The correct answer is C .
• Question 887: A moving coil galvanometer of 300$\mathrm{\Omega }$ resistance gives full scale deflection for 1.0mA. The resistance R, of the shunt that is required to convert the galvanometer into a 3.0A ammeter is Options:
  A) 899.70$\mathrm{\Omega }$
  B) 10.00$\mathrm{\Omega }$
  C) 0.10$\mathrm{\Omega }$
  D) 0.01$\mathrm{\Omega }$
  Show Answer
  The correct answer is C .
• Question 888: The resistances of platinum wire at the ice and steam points are 0.75 ohm and 1.05 ohm respectively. Determine the temperature at which the resistance of the wire is 0.90 ohm Options:
  A) 43.0^oC
  B) 50.0^oC
  C) 69.9^oC
  D) 87.0^oC
  Show Answer
  The correct answer is B .
• Question 889: A silicon material is dopped with an element of a certain group and an n-type semi-conductor is formed. the most likely group of the element is Options:
  A) V
  B) III
  C) I
  D) II
  Show Answer
  The correct answer is A .
• Question 890: the pressure of 3 moles of an ideal gas at a temperature of 27°C having a volume of 10^-3m³ is Options:
  A) 2.49 x 10⁵-2
  B) 7.47 x 10⁵-2
  C) 2.49 x 10⁶-2
  D) 7.47 x 10⁶-2
  Show Answer
  The correct answer is D .