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 711:

  

  In the diagram above, which of the angles ${\theta }_1$ , ${\theta }_2$ , ${\theta }_3$ and ${\theta }_4$ is the angle of deviation of the ray of light passing through the glass prism XYZ?

  Options:
  A) ${\theta }_3$
  B) ${\theta }_2$
  C) ${\theta }_1$
  D) ${\theta }_4$
  Show Answer
  The correct answer is C .
• Question 712: If the volume of a gas increases steadily as the temperature decreases at constant pressure, the gas obeys Options:
  A) Graham's Law
  B) Boyle's Law
  C) Pressure law
  D) Charles Law
  E) No Correct Option
  Show Answer
  The correct answer is B .
• Question 713: The instrument that measures both a.c and d.c is? Options:
  A) a current balance
  B) a moving current ammeter
  C) a moving iron ammeter
  D) an inverter
  Show Answer
  The correct answer is C .
• Question 714: If the linear magnification of the objective and eyepiece convex lenses of a compound microscope are 4 and 7 respectively. Calculate the angular magnification of the microscope Options:
  A) 2
  B) 3
  C) 11
  D) 28
  Show Answer
  The correct answer is D .
• Question 715:

  During the transformation of matter from the solid to the liquid state, the heat supplied does not produce a temperature increase because

  Options:
  A) the heat energy is quickly conducted away
  B) the heat capacity has become very large as the substance melts
  C) the heat gained is equal to the heat lost by the substance
  D) all the heat is used to break the bonds holding the molecules of the solid together
  Show Answer
  The correct answer is D .
• Question 716: If the refractive index of a medium is V2, what is the critical angle? Options:
  A) 45^o
  B) 50^o12'
  C) 56^o25'
  D) 75^o
  E) 90^o
  Show Answer
  The correct answer is A .
• Question 717: A certain radioactive source emits radiations that were found to be deflected by both magnetic and electric fields. The radiations are Options:
  A) beta rays
  B) gamma rays
  C) x-rays
  D) unltr-violet rays
  Show Answer
  The correct answer is A .
• Question 718:

  Dry

  Day 1 - 30°C | Day 2 - 29°C | Day 3 - 25°CWet

  Day 1 - 22°C | Day 2 - 22°C | Day 3 - 21°CThe reading above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days

  Options:
  A) decreased steadily
  B) remained unchanged
  C) increased steadily
  D) was least on Day 1
  Show Answer
  The correct answer is C .
• Question 719: A galvanometer has a resistance of 5Ω. By using a shunt wire of resistance 0.05Ω, the galvanometer could be converted to an ammeter capable of reading 2Amp. What is the current through the galvanometer? Options:
  A) 2mA
  B) 10mA
  C) 20mA
  D) 25mA
  Show Answer
  The correct answer is C .
• Question 720: If the pressure on 100cm³ of an ideal gas is doubled while its kelvin temperature is halved, then the new volume of the gas will become Options:
  A) 25cm³
  B) 50cm³
  C) 100cm³
  D) 200cm³
  E) 400cm³
  Show Answer
  The correct answer is A .