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 2181: 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 2182:

  A body of mass 4 kg resting on a smooth horizontal plane is simultaneously acted upon by two perpendicular forces 6N and 8N. Calculate the acceleration of the motion.

  Options:
  A) 2.5 ms^-2
  B) 3.0 ms^-2
  C) 4.0 ms^-2
  D) 4.5 ms^-2
  Show Answer
  The correct answer is A .
• Question 2183: The threshold of frequency for photoelectric effect depends on the Options:
  A) intensity of incident light
  B) frquency of incident light
  C) material of the photocathode
  D) potential difference between the cathode and the anode
  Show Answer
  The correct answer is C .
• Question 2184:

  I. Low pressure.
  II. High pressure.
  III. High p.d.
  IV. Low p.d.

  Which combination of the above is true of the conduction of electricity through gases?

  Options:
  A) I and IV only
  B) I and III only
  C) II and IV only
  D) II and III only
  Show Answer
  The correct answer is B .
• Question 2185:

  A cone is in unstable equilibrium has its potential energy

  Options:
  A) decreased
  B) increased
  C) unchanged
  D) oscillating
  Show Answer
  The correct answer is A .
• Question 2186: An a.c circuit of e.m.f 12V has a resistor of resistance 8Ω connected in series to an inductor of inductive reactance 16Ω and a capacitor capacitive reactance 10Ω. The current flow in the circuit is Options:
  A) 1.4A
  B) 1.2A
  C) 12.0A
  D) 14.0A
  Show Answer
  The correct answer is B .
• Question 2187: In a good thermos flask, the main cause of heat loss is? Options:
  A) conduction through the cork
  B) the plastic base of the thermos flask
  C) the silvered walls and shiny metals
  D) the outer cover or jacker
  Show Answer
  The correct answer is A .
• Question 2188: The best material for the core of the primary and secondary coils of an induction coil is Options:
  A) copper, because it has a good conductor of electricity
  B) steel, because it becomes magnetic and retains its magnetism for a long time
  C) rubber, because it is a good insulator and the user is prevented from shock
  D) soft iron, because it becomes magnetic but easily loses its magnetism
  E) glass, because it is transparent
  Show Answer
  The correct answer is D .
• Question 2189:
  

  From the diagram above, if the potential difference across the resistor, capacitor and inductor are 60V, 120V and 30V respectively, the effective potential difference is

  Options:
  A) 81
  B) 67
  C) 59
  D) 73
  Show Answer
  The correct answer is B .
• Question 2190:

  Which process is responsible for production of energy in stars?

  Options:
  A) Nuclear reaction
  B) Nuclear fission
  C) Nuclear fusion
  D) Radioactive decay
  Show Answer
  The correct answer is C .