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 1341: In photoelectric effect, electrons will leave the metal surface when illuminated by light of appropriate frequency if the photon energy is Options:
  A) greater than the work function
  B) less than the work function
  C) equal to the work function
  D) equal to the maximium kinetic energy of the electron
  Show Answer
  The correct answer is A .
• Question 1342:

  During the nuclear reaction described by

  235	W →	235	X→	231	Y
  92		93		91

  The particles emitted are respectively

  Options:
  A) α and α
  B) α and β
  C) β and β
  D) β and α
  Show Answer
  The correct answer is D .
• Question 1343: A magnetic field is said to exist at a point if a force is Options:
  A) exerted on a stationary charge at the point
  B) exerted on a moving charge at the point
  C) deflected at the point
  D) strengthened at the point
  Show Answer
  The correct answer is B .
• Question 1344:

  In what range oftemperature is the expansion of water anomalous?

  Options:
  A) +208${}^o$C to +212${}^o$C
  B) -80${}^o$C + -76${}^o$C
  C) 0${}^o$C to +4${}^o$C
  D) -4${}^o$C to +0${}^o$C
  Show Answer
  The correct answer is C .
• Question 1345: A circuit has a resistance of 200Ω. The resistance of the circuit can be reduced to 120Ω when Options:
  A) A 300Ω resistor is connected to it in parallel
  B) An 80Ω resistor is conneceted to it in series
  C) A 150Ω resistor is connected to it in parallel
  D) A 240Ω resistor is connected to it in series
  Show Answer
  The correct answer is A .
• Question 1346: The radiator of a motor car is cooled by Options:
  A) radiation
  B) conduction
  C) convection
  D) radiation and conduction
  Show Answer
  The correct answer is C .
• Question 1347: The distance between the fixed points of a centigrade thermometer is 20cm. What is the temperature when the mercury level is 4.5cm above the lower mark? Options:
  A) 22.5^oC
  B) 29.0^oC
  C) 90.0^oC
  D) 100.0^oC
  Show Answer
  The correct answer is A .
• Question 1348: A stone and a feather are dropped from the same height above the earth surface. ignoring air resistance, which of the following is correct? Options:
  A) the feather will be brown away by the wind while stone will drop steadily
  B) the stone and the feather will both reach the ground a the same time
  C) the feather will reach the ground first
  D) the stone will reach the ground first
  Show Answer
  The correct answer is B .
• Question 1349: The net charge on the atom is zero because Options:
  A) the electrons and the protons that are charged are in the nucleus
  B) the total charge on the electrons is equal to the total charge on the protons
  C) the neutrons from a shield around the charged protons
  D) the number of electrons in an atom is half the number of protons
  E) A and B above
  Show Answer
  The correct answer is B .
• Question 1350: 1kg of copper is transferred quickly from boiling water to a block of ice. Calculate the mass of ice melted, neglecting heat loss. [specific heat capacity of copper 400Jkg^-1K^-1 and latent heat of fusion of ice 333 x 10³Jkg^-1] Options:
  A) 60g
  B) 67g
  C) 120g
  D) 133g
  Show Answer
  The correct answer is C .