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 2161:

  When three coplanar non-parallel are in equilibrium.i. they can be represented in magnitude and direction by the three sides of a triangle taken in order. ii. the lines of action meet at a point. iii. the magnitude of any one force equals the magnitude of the resultant of the other two forces. iv. any one force is the equivalent of the other two. Which of the following statements above are correct?

  Options:
  A) i and ii only
  B) i and iii only
  C) i, ii, iii, and iv
  D) none of them
  Show Answer
  The correct answer is A .
• Question 2162: If the load at the end of a sonometer wire is immersed in a bucket of water, the original fundamental frequency of the wire could be restored by Options:
  A) decrease the length of the wire
  B) increasing the length of the wire
  C) increasing the mass per unit length of the wire
  D) changing the temperature of the wire
  Show Answer
  The correct answer is B .
• Question 2163: Which of the following statements is correct about light and sound waves? Both Options:
  A) are longitudinal waves
  B) are transverse waves
  C) have the same velocity in air
  D) need a medium for propagation
  E) transmit energy
  Show Answer
  The correct answer is E .
• Question 2164: An electric kettle with negligible heat capacity is rated at 2000W. If 2.0kg of water is put in it, how long will it take the temperature of water to rise from 20^OC to 100^OC? [specific heat capacity of water = 4200Jkg^-1k^-1] Options:
  A) 420S
  B) 336S
  C) 168S
  D) 48S
  Show Answer
  The correct answer is B .
• Question 2165: the property that is propagated in a traveling wave is Options:
  A) frequency
  B) amplitude
  C) energy
  D) wave lenght
  Show Answer
  The correct answer is C .
• Question 2166:

  The density of a solid is defined as the

  Options:
  A) mass of the solid compared to the mass of an equal volume of water
  B) amount of water displaced when a unit mass of thesolid is immersed in it
  C) weight per unit volume of the solid
  D) volume per unit mass of the solid
  E) mass per unit volume of the solid
  Show Answer
  The correct answer is E .
• Question 2167: A 0.05kg bullet travelling at 500ms^-1 horizontally strikes a thick vertical wall. It stops after penetrating through the wall horizontal distance of 0.25m. What is the magnitude of the average force the wall exerts on the bullet? Options:
  A) 25N
  B) 50N
  C) 250N
  D) 500N
  E) 25 000N
  Show Answer
  The correct answer is E .
• Question 2168: A wire of length 15m made of a material of resistivity 1.8 x 10^-6$\mathrm{\Omega }$m has a resistance of 0.27$\mathrm{\Omega }$. Determine the area of the wire Options:
  A) 1.5 x 10^-4m²
  B) 1.0 x 10^-4m²
  C) 2.7 x 10^-5m²
  D) 7.3 x 10^-6m²
  Show Answer
  The correct answer is B .
• Question 2169: To produce an enlarged and erect image with a concave mirror,the object must be positioned Options:
  A) at the principal focus
  B) beyond the centre of curvature
  C) between the principal focus and the centre of the curvature
  D) between the principal focus and the pole
  Show Answer
  The correct answer is D .
• Question 2170:

  

  The diagram above shows two capacitors P and Q of capacitance 5μF and 10μF. Find the charges stored in P and Q respectively

  Options:
  A) 2μC and 4μC
  B) 4μC and 2μC
  C) 100μC and 200μC
  D) 200μC and 100μC
  Show Answer
  The correct answer is C .