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 2151: 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 2152: Tea pots are often silver-coated to prevent heat loss by Options:
  A) conduction only
  B) convention only
  C) convection and conduction
  D) radiation only
  Show Answer
  The correct answer is D .
• Question 2153: A beam of light is incident from air to water at an angle of 30^oC. Find the angle of refraction if the refractive index of water is $\frac{4}{3}$ Options:
  A) 15^oC
  B) 18^oC
  C) 22^oC
  D) 24^oC
  Show Answer
  The correct answer is C .
• Question 2154: an object 1cm high placed on the axis 15cm from a converging lens forms an image 30cm from the lens. The size of the image is Options:
  A) 0.5cm
  B) 1.5cm
  C) 3cm
  D) 2.5m
  E) 2cm
  Show Answer
  The correct answer is E .
• Question 2155: The refractive index of liquid is 1.5. If the velocity of light in vacuum is 3.0 x 10⁸ms^-1, the velocity of light in the liquid is Options:
  A) 1.5 x 10⁸m^-1
  B) 2.0 x 10⁸m^-1
  C) 3.0 x 10⁸m^-1
  D) 4.5 x 10⁸m^-1
  E) 9.0 x 10⁸m^-1
  Show Answer
  The correct answer is B .
• Question 2156:

  

  The current I in the fig above is

  Options:
  A) 4.00A
  B) 1.30A
  C) 0.80A
  D) 0.75A
  Show Answer
  The correct answer is A .
• Question 2157:

  A projectile is fired from the ground level with a velocity of 300ms^-1 at an angle of a 30^o to the horizontal.

  Calculate the time taken to reach the maximum height?

  [g = 10ms^-2]

  Options:
  A) 30s
  B) 20s
  C) 25s
  D) 15s
  Show Answer
  The correct answer is D .
• Question 2158: Find the standard deviation of the following data -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5 Options:
  A) 2
  B) 3
  C) √10
  D) √11
  Show Answer
  The correct answer is C .
• Question 2159: In measuring high frequency a.c, the instrument used is the Options:
  A) d.c ammeter
  B) moving coil ammeter
  C) moving iron ammeter
  D) hot wire ammeter
  Show Answer
  The correct answer is D .
• Question 2160: The density of a solid is defined as the Options:
  A) mass of the solid compared to the mass of an equal volume of water
  B) amount of water displaced when a unit mass of thesolid is immersed in it
  C) weight per unit volume of the solid
  D) volume per unit mass of the solid
  E) mass per unit volume of the solid
  Show Answer
  The correct answer is E .