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 521:

  A 35 kΩ is connected in series with a resistance of 40 kΩ. What resistance R must be connected in parallel with the combination so that the equivalent resistance is equal to 25 kΩ?

  Options:
  A) 40 kΩ
  B) 37.5 kΩ
  C) 45.5 kΩ
  D) 30 kΩ
  Show Answer
  The correct answer is B .
• Question 522: What optical instrument can best be constructed with converging lenses of focal lengths 50cm and 5cm? Options:
  A) Compound microscope
  B) Galileo's telescope
  C) Terrestrial telescope
  D) Astronomical telescope
  Show Answer
  The correct answer is D .
• Question 523: The length of mercury thread when it is at 0^oC, 100^oC and at an unknown temperature $\theta$ is 25mm, 225mm and 175mm respectively. The value of $\theta$ is Options:
  A) 85.0^oC
  B) 80.0^oC
  C) 75.0^oC
  D) 70.0^oC
  Show Answer
  The correct answer is C .
• Question 524:

  When water is boiling, it

  Options:
  A) gets hotter
  B) increase is mass
  C) decreases in mass
  D) changes to steam
  Show Answer
  The correct answer is D .
• Question 525: Cathode rays are Options:
  A) high-energy electromagnetic waves
  B) protons
  C) streams of electrons
  D) neutrons
  E) radio waves
  Show Answer
  The correct answer is C .
• Question 526:

  

  The value of the series resistor required to convert the above galvanometer into a voltmeter with a full range deflection of 15V is

  Options:
  A) 985 ohms
  B) 990 ohms
  C) 995 ohms
  D) 1000 ohms
  E) 1005 ohms
  Show Answer
  The correct answer is C .
• Question 527:

  A cell whose internal resistance is 0.55$\mathrm{\Omega }$ delivers a current of 4 A to an external resistor. The lost voltage of the cell is?

  Options:
  A) 4.00 V
  B) 2.20 V
  C) 0.15 V
  D) 8.00 V
  Show Answer
  The correct answer is B .
• Question 528: A person can focus an object only when it lies within 200cm from him. Which spectacles should be used to increase his maximum distance of distinct vision infinity Options:
  A) Convex lens
  B) Binoculars
  C) Concave lens
  D) Plane glasses
  Show Answer
  The correct answer is C .
• Question 529:

  

  The internal resistance of each of the cells E1 and E2 Shown in the figure above is 2 Ohm. Calculate the total current in the circuit

  Options:
  A) 0.80A
  B) 0.50A
  C) 0.40A
  D) 0.004A
  Show Answer
  The correct answer is C .
• Question 530:

  The lead-acid accumulator consists of

  Options:
  A) lead as the positive electrode
  B) lead acid as the negative electrode
  C) hydrochloric acid as the electrolyte
  D) tetraoxosulphate (vi) acid as the electrolyte
  Show Answer
  The correct answer is D .