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:

  The point at which the molecules of a loaded wire begin to slide across each other resulting in a rapid increase in extension is

  Options:
  A) yield point
  B) proportionality point
  C) deformation point
  D) elastic point
  Show Answer
  The correct answer is A .
• Question 242: What is the S.I unit of relative density? Options:
  A) kg m^-2
  B) kg m²
  C) kg cm³
  D) has no S.I unit
  Show Answer
  The correct answer is D .
• Question 243: In a compound microscope Options:
  A) there is only one lens
  B) the objective lens have a shorter focal length than the eyepiece which is convex
  C) the objective lens has a longer focal length than the eyepiece which is convex
  D) the objective lens has a shorter focal length than the eyepiece which is concave
  E) the objective and the eyepiece are both convex and have the same focal length
  Show Answer
  The correct answer is B .
• Question 244: A semiconductor diode is used in rectifying alternating current into direct current mainly because it Options:
  A) allows current to flow in either direction
  B) is non-linear
  C) offers a high input resistance
  D) allows current to flow only in one direction
  Show Answer
  The correct answer is D .
• Question 245:

  A person standing waist-deep in a swimming pool appears to have short legs because of light?

  Options:
  A) diffraction
  B) refraction
  C) reflection
  D) interference
  Show Answer
  The correct answer is B .
• Question 246:

  The statement 'Heat lost by the hot body equals that gained by the cold one' is assumed when determining specific that heat capacity by the method of mixtures. Which of the following validates the assumption?

  I. Lagging the Calorimeter

  II. Ensuring that only S.I units are used

  III. Weighing the calorimeter, the lid and the stirrer.

  Options:
  A) I only
  B) I and II only
  C) I and III only
  D) II and III only
  Show Answer
  The correct answer is C .
• Question 247: Which of the following statements is true about liquid pressure is NOT correct? The pressure Options:
  A) at a point in a liquid is proportional to the depth
  B) at any point in a liquid is the same at the same level
  C) is exerted equally in all directions at any point
  D) of a liquid at any point on the wall of its container acts in a direction perpendicular to the wall
  E) at a particular depth depends on the shape of the vessel
  Show Answer
  The correct answer is E .
• Question 248: A cell of internal resistance 1Ω supplies current to an external resistor of 3Ω. The efficiency of the cell is Options:
  A) 25%
  B) 33%
  C) 50%
  D) 75%
  Show Answer
  The correct answer is D .
• Question 249:

  

  In the Fig above, MN is a light uniform meter rule pivoted at O, the 80cm mark. A load of mass 3.0 kg is suspended on the meter rule at L, the 10cm mark. If the rule is kept in equilibrium by a string RP, fixed at P and attached to the rule at R, the 20cm mark, then the Tension T on the string is

  Options:
  A) 30N
  B) 34N
  C) 35N
  D) 60N
  E) 70N
  Show Answer
  The correct answer is E .
• Question 250: Ripples on water and light waves are similar because both Options:
  A) have the same frequency
  B) can be refracted and diffracted
  C) are longitudinal waves
  D) have the same velocity
  Show Answer
  The correct answer is C .