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 571: Consider a thick glass tumbler and a thin glass tumbler which are made of the same kind of glass. Some hot liquid is poured into them. Which of the following statements is correct? Options:
  A) the thick tumbler is less likely to crack because it is stronger
  B) the thick tumbler is less likely to crack because it insulates the heat beter, glass being a poor conductor of heat
  C) Both tumblers are equally likely to crack because they are made of the same kind of glass
  D) the thick tumbler is more likely to crack because uneven expansion persists for a longer time within the thicker glass
  E) the thick tumbler is more likely to crack because it is heavier
  Show Answer
  The correct answer is C .
• Question 572: Which of the following features is NOT a characteristic of natural radioactivity? Options:
  A) Radioactivity is a nuclear phenomenon
  B) Radioactivity is exhibited only by elements of mass number greater than 206
  C) The radioactivity of an element is affected by electric and magnetic fields in the surroundings
  D) Radioactive substances emits three types of radiations, a-rays, $\beta$-rays and y-rays
  E) The radioactive element is transformed into a new element
  Show Answer
  The correct answer is B .
• Question 573: If the distance between the plates of a parallel plate capacitor is decreased, its capacitance Options:
  A) becomes zero
  B) decreases
  C) increases
  D) is halved
  E) remains the same
  Show Answer
  The correct answer is C .
• Question 574: The primary winding of a transformer has 400 turns and its secondary has 100 turns. If a source of e.m.f. of 12V is applied to the primary, the secondary e.m.f. will be Options:
  A) 3V
  B) 6V
  C) 24V
  D) 48V
  Show Answer
  The correct answer is A .
• Question 575: A solid suspended by a piece of string is completely immersed in water. On attempting to lift the solid out of the water, the string breaks when the solid is partly out of the water. This is because Options:
  A) the tension in the string decreases as the solid is lifted
  B) the mass of the solid has increased
  C) the solid apparently weighs less when completely immersed in water than when partially immersed
  D) part of the solid still in water is exerting more force on the string
  E) the solid is no longer in equilibrium with water
  Show Answer
  The correct answer is C .
• Question 576: The correct unit of energy density is? Options:
  A) kg m³ s^-2
  B) kg m² s^-2
  C) kg m^-3 s^-2
  D) kg m^-1 s^-2
  Show Answer
  The correct answer is D .
• Question 577: The product PV where P is pressure and V is volume has the same unit as Options:
  A) force
  B) power
  C) energy
  D) accelaration
  Show Answer
  The correct answer is C .
• Question 578:

  Which of the following has the lowest internal resistance when new?

  Options:
  A) Leclanche cell
  B) Daniell cell
  C) Torch battery
  D) Accumulator
  Show Answer
  The correct answer is D .
• Question 579:

  In order to view the sun, the most suitable instrument to use is?

  Options:
  A) helioscope
  B) telescope
  C) stroboscope
  D) sun meter
  Show Answer
  The correct answer is A .
• Question 580:

  

  Three cells each of e.m.f 1.5 V and internal resistance 2.5Ω are connected as shown in the diagram above. Find the net e.m.f and the internal resistance

  Options:
  A) 1.5V, 7.50Ω
  B) 1,5V, 0.83Ω
  C) 4.5V, 7.50Ω
  D) 4.5V, 0.83Ω
  Show Answer
  The correct answer is B .