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 661:

  A parallel plate capacitor separated by an air gap is made of $0.8m^2$tin plates and 20 mm apart. It is connected to 120 V battery. What is the charge on each plate?

  Take ${\epsilon }_o$ = $8.85\times {10}^{-}12F{m}^{-}1$

  Options:
  A) 3.54nC
  B) 42.5nC
  C) 35.4nC
  D) 4.25nC
  Show Answer
  The correct answer is B .
• Question 662:

  Arrange the following in the order of their increasing frequency.I. Visible light

  II. Gamma rays

  III. Radio waves

  IV. Infra-red radiation

  V. Ultra-violet radiation

  Options:
  A) I, II, III, IV, V
  B) II, III, IV, V, I
  C) III, IV, V, I, II
  D) IV, III, I. V, II
  E) III, IV, I,V, II
  Show Answer
  The correct answer is E .
• Question 663: Which of the following is the correct definition of 'half-life'? Options:
  A) the average life-time of a radioactive material
  B) the time it takes a radioactive material to decay to half of its original quantity
  C) half the period a radioactive material decays completely
  D) half of the decay constant
  E) the decay constant times life-time
  Show Answer
  The correct answer is B .
• Question 664: Rationalize $\frac{2\sqrt{3}}{+}\sqrt{5}\sqrt{5}-\sqrt{3}$ Options:
  A) 3√15 - 11
  B) $\frac{3\sqrt{15}-11}{2}$
  C) 3√15 + 11
  D) $\frac{3\sqrt{15}+11}{2}$
  Show Answer
  The correct answer is D .
• Question 665: A vapour is said to be saturated when Options:
  A) moer molecules return to the liquid than leave it
  B) a dynamic equilibrium exists between the liquid molecules and the vapour molecules at a given temperature
  C) the vapour pressure is atmospheric
  D) the temperature of the vapour varies
  E) all molecules are moving with the same speed
  Show Answer
  The correct answer is B .
• Question 666:

  When the breaks in a car are applied, the frictional force on the tyresis?

  Options:
  A) a disadvantage because it is in the direction of the motion of the car
  B) a disadvantage because it is in the opposite direction of the motion of the car
  C) an advantage because it is in the direction of the motion of the car
  D) an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 667: A 24V potential difference is applied across a parallel combination of four 6-ohms resistor, The current in each resistor is Options:
  A) 1A
  B) 4A
  C) 16A
  D) 18A
  E) 36A
  Show Answer
  The correct answer is B .
• Question 668: An object is projected with a velocity of 50ms^-1 from ground level at an angle θ to the vertical. If the total time of flight of the projectile is 5s, what is the value of θ? (g = 10ms^-2) Options:
  A) 0°
  B) 30°
  C) 45°
  D) 60°
  E) 90°
  Show Answer
  The correct answer is B .
• Question 669: 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 670: In which of the following fields is repulsion NOT experienced? Options:
  A) Electrical only
  B) Gravitational only
  C) Magnetic only
  D) Magnetic and electrical
  E) Magnetic and gravitational
  Show Answer
  The correct answer is B .