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 1491: The equation P^aV^bT^c= constant reduces to Charles Law if Options:
  A) a=1, b=1and c=0
  B) a=1, b=0 and c=-1
  C) a=0, b=1 and c=1
  D) a=0, b=1 and c=-1
  Show Answer
  The correct answer is D .
• Question 1492: The maximum permissible current through a galvanometer G of internal resistance 10$\mathrm{\Omega }$ is 0.05A. A resistance R is used to convert G into a voltmeter with a maximum reading of 100V. Find the value of R and how it is connected to G Options:
  A) 20,000 ohms in parallel
  B) 19,990 ohms in series
  C) 1990 ohms in series
  D) 100 ohms in series
  Show Answer
  The correct answer is C .
• Question 1493:

  

  From the diagram above, the measuring accuracy of the micrometer screw gauge is

  Options:
  A) 4.78mm
  B) 4.16mm
  C) 4.66mm
  D) 4.70mm
  Show Answer
  The correct answer is B .
• Question 1494: Energy losses through eddy currents are reduced by using Options:
  A) low resistance wires
  B) insulated soft iron wires
  C) few turns of wires
  D) high resistance wires
  Show Answer
  The correct answer is B .
• Question 1495: A note is the octave of another note if it has Options:
  A) a frequency twice that of the first note
  B) frequency half that of the first note
  C) the same fundamental frequency as the first one
  D) a frequency frequency eight times that of the first note
  Show Answer
  The correct answer is A .
• Question 1496: The terminal voltage of a battery is 4.0V when supplying a current of 2.0A, and 2.0V when supplying a current of 3.0A. The internal resistance of the battery is Options:
  A) 0.5 $\mathrm{\Omega }$
  B) 1.0$\mathrm{\Omega }$
  C) 2.0$\mathrm{\Omega }$
  D) 4.0$\mathrm{\Omega }$
  Show Answer
  The correct answer is C .
• Question 1497: Three electric cells each of e.m.f 1.5V and internal resistance of 1.0$\mathrm{\Omega }$ are connected in parallel across an external resistance of $\frac{2}{3}$$\mathrm{\Omega }$. Calculate the value of the current in the resistor Options:
  A) 0.5 A
  B) 0.9A
  C) 1.5A
  D) 4.5A
  Show Answer
  The correct answer is C .
• Question 1498:

  An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?

  Options:
  A) 15 cm
  B) 70 cm
  C) 40 cm
  D) 40 cm
  Show Answer
  The correct answer is A .
• Question 1499:

  A progressive wave equation is represented by y = a sin(150 πt - πx/4). if the phase difference of a progressive wave is 45°, the value of x in the equation is

  Options:
  A) 3 cm
  B) 4 cm
  C) 1 cm
  D) 2 cm
  Show Answer
  The correct answer is C .
• Question 1500: A submarine is observed to rise from a real depth off 80 m to 60 m in water. calculate the change in apparent depth.
  [Refraction index of water (4)/3] Options:
  A) 45 m
  B) 80 m
  C) 15 m
  D) 60 m
  Show Answer
  The correct answer is C .