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 961: Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then Options:
  A) A and B are equal
  B) A is greater than B
  C) the angle between A and B is 0°
  D) the angle between A and B is 90°
  E) the angle between A and B is 180°
  Show Answer
  The correct answer is E .
• Question 962:

  50cm³ of air at a pressure of 5Nm^-2 is enclosed in a metal tube by a piston. If the piston is pushed in a distance of 10cm, what will the pressure of the air become, if the cross-sectional area of the tube is 2cm^-2? (Assume that the temperature remains constant throughout)

  Options:
  A) 12.5 Nm^-2
  B) 8.7 Nm^-2
  C) 8.3 Nm^-2
  D) 3.8Nm^-2
  E) 3.0Nm^-2
  Show Answer
  The correct answer is C .
• Question 963:

  I. The number of neutrons released exceeds the number that caused the fission.

  II. There is loss of mass.

  III. Energy is produced.

  IV. Smaller nuclei merge to form larger nuclei

  Which of the statement above are correct about nuclear fission?

  Options:
  A) II,III and IV only
  B) I, II and IV only
  C) I,II and III only
  D) I, III and IV only
  Show Answer
  The correct answer is C .
• Question 964: Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V. Options:
  A) 0.02 J
  B) 0.10 J
  C) 0.20 J
  D) 1.00 J
  E) 10.00 J
  Show Answer
  The correct answer is E .
• Question 965: A 2000W electric heater is used to heat a metal object of mass 5kg initially at 10^oC. If a temperature rise of 30^oC is obtained after 10min, the heat capacity of the material is Options:
  A) 6.0 x 10⁴J^oC^-1
  B) 4.0 x 10⁴J^oC^-1
  C) 1.2 x 10⁴J^oC^-1
  D) 8.0 x 10⁴J^oC^-1
  Show Answer
  The correct answer is B .
• Question 966: A stand-by generator is connected to fifteen 40 W lamps and musician's 600 W amplifying system. How much energy is used if the generator runs for 6 hours? Options:
  A) 3.84k Wh
  B) 7.20k Wh
  C) 8.40k Wh
  D) 12.00k Wh
  E) 14.56k Wh
  Show Answer
  The correct answer is B .
• Question 967: Calculate the position of an object placed in front of a convex mirror having focal length of 12 cm such that an image is formed 6 cm away from the mirror Options:
  A) 4. 0 cm
  B) 3. 0 cm
  C) 12.0 cm
  D) 9.0 cm
  Show Answer
  The correct answer is C .
• Question 968: The pair of physical quantities that are scalar only are ? Options:
  A) volume and area
  B) moment and momentum
  C) length and displacement
  D) Impulse and time
  Show Answer
  The correct answer is A .
• Question 969: Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is Options:
  A) conical
  B) cubical
  C) cylindrical
  D) parabolic
  E) spherical
  Show Answer
  The correct answer is C .
• Question 970: Two resistors 5Ω and 10Ω are arranged first in series and later in parallel to a 24V source, the ratio of total power dissipated in the series and parallel arrangements respectively is Options:
  A) 5:3
  B) 1:50
  C) 50:1
  D) 3:5
  E) No Correct Option
  Show Answer
  The correct answer is E .