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 471:

  A straight wire 15cm long, carrying a current of 6.0A is in a uniform field of 0.40T. What is the force on the wire when it is at right angle to the field

  Options:
  A) 0.46N
  B) 0.35N
  C) 0.36N
  D) 0,24N
  Show Answer
  The correct answer is C .
• Question 472: Which of the following is a fundamental unit? Options:
  A) Newton
  B) Watt
  C) Joule
  D) Second
  Show Answer
  The correct answer is D .
• Question 473: The absolute refractive indices of glass and water are $\frac{3}{2}$ and $\frac{4}{3}$ respectively. The refractive index at the interface when a ray travels from water to glass is Options:
  A) $\frac{1}{2}$
  B) $\frac{8}{9}$
  C) $\frac{9}{8}$
  D) $\frac{17}{12}$
  E) 2
  Show Answer
  The correct answer is C .
• Question 474: A 5kg block is released from rest on a smooth plane inclined at an angle of 30^o to the horizontal. What is the acceleration down the plane? [g = 10ms^-2] Options:
  A) 5.0 ms^-2
  B) 5.8 ms^-2
  C) 8.7 ms^-2
  D) 25.0 ms^-2
  Show Answer
  The correct answer is A .
• Question 475:

  If in a simple pendulum experiment the length of the inextensible string is increased by a factor offour, its period is increased by a factor of?

  Options:
  A) 4
  B) $\frac{\pi }{2}$
  C) $\frac{1}{4}$
  D) 2
  Show Answer
  The correct answer is D .
• Question 476: An object is weighted at different locations on the earth. What will be the right observation? Options:
  A) Both the mass and weight are constant
  B) Both the mass and weight vary
  C) the mass is constant while the weight varies
  D) the weight is constant while the mass varies
  Show Answer
  The correct answer is C .
• Question 477:

  Calculate the temperature of 6 moles of an ideal gas at a pressure of 7.6 x 10⁶Nm^-2 with a volume of 10^-3m³.

  [R = 8.3jmol^-1K^-1]

  Options:
  A) 201^oC
  B) 126^oC
  C) 153^oC
  D) 185^oC
  Show Answer
  The correct answer is C .
• Question 478:

  

  Fig 10 above shows a see-saw which is perfectly in balance, the weighs of the people sitting on it are 50kg, xkg and 15kg as shown, the sit at distances of 1.5, 1.5 and 2m from the pivot respectively. The vale of X is

  Options:
  A) 30
  B) 35
  C) 70
  D) 24.25
  E) impossible to find
  Show Answer
  The correct answer is A .
• Question 479: Two masses 40g and 60g respectively, are attached firmly to the ends of the light meter rule. The center of gravity of the system is Options:
  A) at the mid-point of the meter rule
  B) 40cm from the lighter mass
  C) 40cm from the heavier mass
  D) 60cm from the heavier mass
  E) indeterninate because the meter-rule is light
  Show Answer
  The correct answer is C .
• Question 480: In a compound microscope, the objective and the eye piece focal lengths are Options:
  A) At infinity
  B) Long
  C) Short
  D) The same
  Show Answer
  The correct answer is C .