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 241:

  Which of the following statements about radioactivity is true?

  (i) Alpha particle is positively charged

  (ii)Beta particle is negativelycharged

  (iii) Gamma ray is neutral

  (iv) Beta particle has thesame massas helium atom

  (v) Gamma ray is charged.

  Options:
  A) i, ii, iii, iv only
  B) i, ii, iii only
  C) iv and v only
  D) i, ii and v only
  Show Answer
  The correct answer is B .
• Question 242: The speed of light in vacuum is 3.0 x 10⁸ms^-1. If the refractive index of a transparent liquid is $\frac{4}{3}$, then the speed of light in the liquid is Options:
  A) 0.44 x 10 ⁸ms^-1
  B) 2.25 x 10 ⁸ms^-1
  C) 3.0 x 10 ⁸ms^-1
  D) 4.0 x 10 ⁸ms^-1
  E) 4.33 x 10 ⁸ms^-1
  Show Answer
  The correct answer is B .
• Question 243: Calculate the peak voltage of a mains supply of r.ms. value 220V. Options:
  A) 121 V
  B) 156 V
  C) 225 V
  D) 240 V
  E) 311 V
  Show Answer
  The correct answer is E .
• Question 244: The resistance in a series R-C circuit is 5 Ω. If the impedance of the circuit is 13 Ω, calculate the reactance of the capacitor Options:
  A) 65 Ω
  B) 18 Ω
  C) 16 Ω
  D) 14 Ω
  E) 12 Ω
  Show Answer
  The correct answer is E .
• Question 245: When very hot water is poured into two identical thin and thick glass tumblers in equal volumes, the thick one cracks because? Options:
  A) of the even expansion of glass
  B) glass is a crystal
  C) glass is a good conductor of heat
  D) of the uneven expansion of gass
  Show Answer
  The correct answer is D .
• Question 246: An a.c circuit of e.m.f 12V has a resistor of resistance 8Ω connected in series to an inductor of inductive reactance 16Ω and a capacitor capacitive reactance 10Ω. The current flow in the circuit is Options:
  A) 1.4A
  B) 1.2A
  C) 12.0A
  D) 14.0A
  Show Answer
  The correct answer is B .
• Question 247: Calculate the wavelength of light travelling with a speed of 3 × 108ms^-1 and a frequency of 6.2 × 10¹⁴Hz. Options:
  A) 4.8 × 10^-8m
  B) 4.8 × 10^-7m
  C) 4.8 × 10^-6m
  D) 4.8 × 10^-5m
  E) 4.8 × 10^-4m
  Show Answer
  The correct answer is B .
• Question 248:

  The slope of the straight line displacement-time graph indicates?

  Options:
  A) distance traveled
  B) uniform velocity
  C) uniform acceleration
  D) uniform speed
  Show Answer
  The correct answer is B .
• Question 249: An object is placed directly below a glass block of thickness 3.0cm. Calculate the lateral displacement of the object if the refractive index of the glass is 1.5. Options:
  A) 1.0cm
  B) 1.5cm
  C) 2.0cm
  D) 2.5cm
  Show Answer
  The correct answer is A .
• Question 250: How much heat is required to convert 50g of water at 100°C to steam at the same temperature? (Specific latent heat of vaporization of water = 2260 Jg^-11) Options:
  A) 1.13 × 10^-4J
  B) 1.31 × 10²J
  C) 1.30 × 10⁴J
  D) 1.13 × 10⁵J
  E) 1.31 × 10⁶J
  Show Answer
  The correct answer is D .