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 261: Evaporation of a liquid produces cooling of the liquid because the Options:
  A) attraction between the vapour molecules and the liquid molecules is great
  B) average kinetic energy of the liquid is reduced
  C) density of the liquid decreases
  D) vapour pressure above the liquid rises
  E) volume of the liquid decreases
  Show Answer
  The correct answer is B .
• Question 262: The major difference between a pure semiconductor and a pure metal is that Options:
  A) metals are harder than semiconductor
  B) while resistance of metals decrease with temperature , the reverse is the case for semiconductor
  C) the resistance of metals increases with temperature, while for semiconductors, it is the reverse
  D) metals have forbidden gaps while semiconductors have not
  Show Answer
  The correct answer is C .
• Question 263: 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 .
• Question 264: A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field B in the direction of the field. The force on the particle is Options:
  A) Bqv
  B) Bq$\frac{v}{m}$
  C) Bqvm
  D) mv$\frac{B}{q}$
  E) $\frac{mv}{Bq}$
  Show Answer
  The correct answer is C .
• Question 265: If the decay constant of a radioactive substance is 0.231s¹, the half-life is? Options:
  A) 3.00 s
  B) 0.12 s
  C) 0.33 s
  D) 1.50 s
  Show Answer
  The correct answer is A .
• Question 266:

  A progressive wave equation is represented by y = a sin(150 πt - πx/4). if the phase difference of a progressive wave is 45°, the value of x in the equation is

  Options:
  A) 3 cm
  B) 4 cm
  C) 1 cm
  D) 2 cm
  Show Answer
  The correct answer is C .
• Question 267: A parallel plate capacitor of area 10cm² in vacuum has a capacitance of 10^-2$\mu$F. What is the distance between the plates?(e = 9 x 10^-12fm) Options:
  A) 9 x 10^-13m
  B) 9 x 10^-7m
  C) 9 x 10^-3m
  D) 9 x 10⁷m
  Show Answer
  The correct answer is B .
• Question 268:

  Which of the following is not a consequence of hydrogen bubbles covering the copper plate of a primary cell?

  Options:
  A) formation of hydrogen bubbles on the electrode
  B) increase in the resistance of the cell
  C) local action
  D) polarization
  Show Answer
  The correct answer is C .
• Question 269: In an ideal wheel an axle system, R stand for the radius of the wheel and r is the radius of the axle. the mechanical advantage is Options:
  A) (R/r)²
  B) r/R
  C) (r/R)²
  D) R/r
  Show Answer
  The correct answer is D .
• Question 270: An object is placed in front of a converging lens of a focal length 20cm. The image is virtual and has a magnification of 2. What is the distance of the object from the lens? Options:
  A) 5cm
  B) 10cm
  C) 30cm
  D) 40cm
  Show Answer
  The correct answer is B .