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 1691: A metal has a work function of 3.0 eV. What is the threshold frequency of the metal when electrons are just liberated from the metal.(1 _eV = 1.6 × 10^-19J; h = 6.6 × 10^-34Js) Options:
  A) 4.8 × 10^-19Hz
  B) 9.3 × 10^-7Hz
  C) 4.8 × 10¹⁴Hz
  D) 7.3 × 10¹⁴Hz
  E) 9.3 × 10¹⁴Hz
  Show Answer
  The correct answer is D .
• Question 1692: The dimension of electromotive force are ` Options:
  A) ML²T^-3I^-1
  B) ML²T^-3I^-2
  C) M²LT^-2I^-1
  D) M²L²T^-1I^-1
  Show Answer
  The correct answer is A .
• Question 1693:

  An incident ray XY makes an angle of 15${}^{\circ }$ with a fixed line AY which is normal to surface of a plane mirror if the mirrow is turned as indicated by the arrow through ${40}^{\circ }$, what angle will the reflected ray make with AY?

  Options:
  A) ${25}^{\circ }$
  B) ${40}^{\circ }$
  C) ${15}^{\circ }$
  D) ${55}^{\circ }$
  E) ${95}^{\circ }$
  Show Answer
  The correct answer is D .
• Question 1694: Which of the following is NOT a fundamental S.I unit? Options:
  A) Meter
  B) Ampere
  C) Kelvin
  D) Seconds
  E) Radian
  Show Answer
  The correct answer is E .
• Question 1695: Which of the following is obtained when a magenta is mixed with green colour? Options:
  A) Yellow
  B) Blue
  C) White
  D) Red
  Show Answer
  The correct answer is C .
• Question 1696:

  A concave mirror of radius of curvature 40 cm forms a real image twice as large as the object.

  The object distance is

  Options:
  A) 10 cm
  B) 30 cm
  C) 40 cm
  D) 60 cm
  Show Answer
  The correct answer is B .
• Question 1697:

  Two metals P and Q are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their

  Length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is

  Options:
  A) 1:2
  B) 2:1
  C) 8:9
  D) 9:8
  Show Answer
  The correct answer is A .
• Question 1698: Which of the following is TRUE of a particle moving in a horizontal circle with constant angular velocity? Options:
  A) The energy is costant but the linear momentum varies
  B) The linear momentum is conatant but the energy varies
  C) both energy and linear momentum are constant
  D) The speed and the linear velocity are both constant
  Show Answer
  The correct answer is C .
• Question 1699: Any line or section through an advancing wave in which all the particles are in the same phase is called the Options:
  A) wave lenght
  B) wave crest
  C) wave trough
  D) wave amplitude
  E) wave front
  Show Answer
  The correct answer is E .
• Question 1700: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .