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 1121: The space surrounding a magnet in which the magnetic force is exerted is Options:
  A) magnetic field
  B) magnetic flux
  C) magnetic point
  D) magnetic pole
  E) magnetic strength
  Show Answer
  The correct answer is A .
• Question 1122:

  If an object just begins to slide on a surface inclined at 30ºto the horizontal,the coefficient of friction is?

  Options:
  A) √3
  B) $\frac{\surd 3}{2}$
  C) $\frac{1}{\surd 2}$
  D) $\frac{1}{\surd 3}$
  Show Answer
  The correct answer is D .
• Question 1123:

  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 1124: The bulb of a motorcycle head-lamp is marked 40W, 6V. The resistance of the filament when it is switched on is Options:
  A) $\frac{6^2}{{40}^2}$ohms
  B) $\frac{40}{6^2}$ohms
  C) $\frac{40}{6}$ohms
  D) 6 x 40 ohms
  E) $\frac{6^2}{40}$ohms
  Show Answer
  The correct answer is E .
• Question 1125:

  A radioactive isotope has a decay constant of 10^-6s^-1.

  Calculate its half - life?

  Options:
  A) 5.93 x 10⁶s
  B) 6.93 x 10⁷s
  C) 6.93 x 10⁹s
  D) 5.93 x 10⁷s
  Show Answer
  The correct answer is B .
• Question 1126:

  The near point of a patient's eye is 50.0 cm. What power (in diopters) must a corrective lens have to enable the eye to see clearly an object 25.0 cm away?

  Options:
  A) 2 diopters
  B) 2.5 diopters
  C) 0.5 diopters
  D) 3 diopters
  Show Answer
  The correct answer is A .
• Question 1127: If the refractive index of a medium is V2, what is the critical angle? Options:
  A) 45^o
  B) 50^o12'
  C) 56^o25'
  D) 75^o
  E) 90^o
  Show Answer
  The correct answer is A .
• Question 1128: A ray of light strikes a plane mirror at an angle of incidence of 35°. If the mirror is rotated through 10°, through what angle is the reflected ray rotated? Options:
  A) 70°
  B) 45°
  C) 25°
  D) 20°
  Show Answer
  The correct answer is D .
• Question 1129: A glass plate 0.9cm thick has a reflective index of 1.50. how long does it take for a pulse of light to pass through the plate?
  [c = 3.0 x ⁸ ms^-1] Options:
  A) 4.5 x 10^-11s
  B) 4.5 x 10^-10s
  C) 4 .5 x 10^-12 s
  D) 3.0 x 10^-10s
  Show Answer
  The correct answer is C .
• Question 1130: A current of 0.5A flows through a resistor when connected to a 40-V battery. How much energy is dissipated in 2 minutes? Options:
  A) 1200J
  B) 1500J
  C) 2400J
  D) 96000J
  Show Answer
  The correct answer is C .