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 2671:

  Natural radioactivity consists of the emission of

  Options:
  A) α- particles and β-rays
  B) α- particles and X-rays
  C) α- particles, β - rays and g-rays
  D) γ- rays and X-rays
  Show Answer
  The correct answer is C .
• Question 2672: Power supply is transmitted at a very high voltage and low current in order to Options:
  A) make pass through the trasformers
  B) increase the power supply
  C) make it travel fast
  D) prevent overheating of the coil
  Show Answer
  The correct answer is D .
• Question 2673: If light with photon energy 2eV is incident suitably on the surface of a metal with work function 3eV, then Options:
  A) no electron will be emitted
  B) the few electrons emitted will have a maximum kinetic energy of 1eV
  C) the few electrons emitted will have a maximum kinetic energy of 3eV
  D) many electrons will be emitted
  Show Answer
  The correct answer is A .
• Question 2674: 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 2675: I Electrical potential, II Torque, III Kinetic Energy, IV Momentum. Which of the quantities listed are vectors? Options:
  A) II and IV
  B) I and II
  C) I and III
  D) II and III
  Show Answer
  The correct answer is A .
• Question 2676:

  

  In the diagram above, if the internal resistance of the cell is zero, the ration of the powers P₁ and P₂ dissipated by R₁ and R₂

  Options:
  A) ^R₂/_R1
  B) ^R₁/_R2
  C) ^R₁+R₂/_R1
  D) ^R₁+R₂/_R2
  Show Answer
  The correct answer is A .
• Question 2677:

  

  In the above circuit, The fuse wire melts when

  Options:
  A) K is Opened
  B) K is closed
  C) the 14 ohm resistor is doubled with k closed
  D) the 6 ohm resistor is doubled with k closed
  Show Answer
  The correct answer is B .
• Question 2678: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 2679: The net charge on the atom is zero because Options:
  A) the electrons and the protons that are charged are in the nucleus
  B) the total charge on the electrons is equal to the total charge on the protons
  C) the neutrons from a shield around the charged protons
  D) the number of electrons in an atom is half the number of protons
  E) A and B above
  Show Answer
  The correct answer is B .
• Question 2680: A wire of length 100.0m at 30^o has linear expansive of 2x10^-5K^-1 Calculate the length of the wire at a temperature of - 10^oC Options:
  A) 100.08m
  B) 100.04m
  C) 99.96m
  D) 99.92m
  Show Answer
  The correct answer is D .