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 2071:

  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 2072:

  The density of a certain oil on frying becomes

  0.4 kgm^-3 with the volume of 20m³. what will be its initial volume when its initial density is 0.8 kgm^-3 assuming no loss of oil due to spillage?

  Options:
  A) 12 kgm^-3
  B) 10 kgm^-3
  C) 8 kgm^-3
  D) 5 kgm^-3
  Show Answer
  The correct answer is B .
• Question 2073: A metal cube of volume 10³mm³ is lowered into a measuring cylinder containing water. If the internal cross-sectional area of the cylinder is 1.5 x 10²mm², by how much does the water level rise in the cylinder? Options:
  A) 6.67 x 10⁰mm
  B) 8.50 x 10²mm
  C) 1.15 x 10³mm
  D) 2.50 x 10³mm
  E) 1.50 x 10⁵mm
  Show Answer
  The correct answer is A .
• Question 2074:

  

  In the figure above, M and N are insulated metal spheres in contact. A negatively charged ebonite rod P is I brought near M. When M and N are Separated and the rod is taken away, which of the following statements is correct

  Options:
  A) both M and N have acquired negative charges
  B) both M and N have acquired positive charges
  C) M has acquired negative charge and N positive charge
  D) N has acquired negative charge and M positive charge
  Show Answer
  The correct answer is D .
• Question 2075: a lead bullet of mass 0.05kg is fired with a velocity of 200ms^-1 into a lead block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is Options:
  A) 50 J
  B) 100 J
  C) 150 J
  D) 200 J
  Show Answer
  The correct answer is A .
• Question 2076: In a D.C. circuit, a 10 microfarad (mf) capacitor is placed in series with a 10 0hm resistor. The total resistance of the combination is Options:
  A) 10 ohms
  B) 1 ohms
  C) zero
  D) 20 ohms
  E) infinite
  Show Answer
  The correct answer is E .
• Question 2077: When a plane mirror at which a ray is incident is rotated through an angle $\theta$, the reflected ray will be rotated through Options:
  A) $\frac{1}{2}$$\theta$
  B) $\theta$
  C) 2$\theta$
  D) 3$\theta$
  Show Answer
  The correct answer is C .
• Question 2078: A generator manufacturing company was contracted to produce an a.c dynamo but inadvertently produced a d.c dynamo. To correct this error, the Options:
  A) armature coil should be made of silver
  B) commutator should be replaced with slip ring
  C) commutator should be replaced with split rings
  D) armature coil should be made of aluminium
  Show Answer
  The correct answer is B .
• Question 2079: Which is NOT one of the laws of solid friction? Options:
  A) The frictional force between two surfaces opposes their relative motion
  B) The ratio of frictional force to the normal reaction varies for two given surfaces
  C) The ratio of frictional force to the normal reaction is constant for two given surfaces
  D) The limiting frictional force is independent of the area of surface in contact.
  E) Dynamic frictional force is independent of the relative velocity of the surfaces in contact.
  Show Answer
  The correct answer is B .
• Question 2080: A charge of one coulomb liberates 0.0033g of copper in an electrolytic process. How long will it take a current of 2A to librate 1.98g of copper in such a process? Options:
  A) 5 mins
  B) 30 mins
  C) 50 mins
  D) 60 mins
  E) 120 mins
  Show Answer
  The correct answer is A .