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 91: Heat may be transferred by conduction, convection and radiation. By which of these methods does heat travel through vacuum? Options:
  A) conduction only
  B) convection only
  C) radiation only
  D) non of these methods
  Show Answer
  The correct answer is C .
• Question 92: As a positively charge rod is brought nearer to the top cap of a positively charged gold leaf electroscope, the divergence of the leaves will Options:
  A) decrease to zero
  B) steadily increase
  C) decrease to zero and then increase
  D) remain constant
  E) increase to a maximum and then decrease
  Show Answer
  The correct answer is B .
• Question 93: A series RLC circuit is said to resonate, when Options:
  A) capacitive reactance is zero
  B) conductance is maximum
  C) current is minimum
  D) impedance is minimum
  E) inductive reactance is zero
  Show Answer
  The correct answer is D .
• Question 94: If the distance between two suspended masses 10kg each is tripled, the gravitational force of attraction between them is reduced by Options:
  A) one half
  B) one third
  C) one quarter
  D) one ninth
  Show Answer
  The correct answer is D .
• Question 95: The speed of sound travelling in various media increases in the order: Options:
  A) air, iron bar, water
  B) air, water, iron bar
  C) iron, bar water, air
  D) water, air, iron bar
  E) water, iron bar, air
  Show Answer
  The correct answer is B .
• Question 96:

  

  In the above fig, PQ and R are vectors, which of the following options, gives a correct relationship between the vectors

  Options:
  A) P = Q + R
  B) P = Q - R
  C) P = R - Q
  D) P + Q + R = O
  Show Answer
  The correct answer is A .
• Question 97: Three 3ω resistance are connected in parallel what is the equivalent resistance? Options:
  A) 1ω
  B) 9ω
  C) 3ω
  D) 0.33ω
  Show Answer
  The correct answer is A .
• Question 98: A car of mass 1500 kg goes round a circular curve of radius 50m at a speed of 40 ms^-1. The magnitude of the centripetal force on the car is ? Options:
  A) 4.8 x 10⁴ N
  B) 4.8 x 10³ N
  C) 1.2 x 10³ N
  D) 1.2 x 10² N
  Show Answer
  The correct answer is A .
• Question 99: Equal masses of copper and rubber are raised to the same temperature. After sometimes, the copper was observed to be at a lower temperature because Options:
  A) the specific heat capacity of copper is lower than that of rubber
  B) copper expands more than rubber
  C) the specific heat capacity of rubber is lower than that of copper
  D) rubber expands more than copper
  Show Answer
  The correct answer is A .
• Question 100:

  Determine the value of x from the nuclear reaction below:

  ${}_{86}^{222}Rn$ → ${}_{88}^{x}Ra$ + 2β + energy

  Options:
  A) 220
  B) 222
  C) 224
  D) 226
  E) 228
  Show Answer
  The correct answer is B .