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 41:

  The lead-acid accumulator consists of

  Options:
  A) lead as the positive electrode
  B) lead acid as the negative electrode
  C) hydrochloric acid as the electrolyte
  D) tetraoxosulphate (vi) acid as the electrolyte
  Show Answer
  The correct answer is D .
• Question 42:

  A thermocouple thermometer is connected to a millivoltmeter which can read up to 10mV. When one junction is in ice at 0°C and the other is steam at 100°C, the millivoltmeter reads 4mV. What is the maximum temperature which this arrangement can measure

  Options:
  A) 100${}^o$C
  B) 248${}^o$C
  C) 250${}^o$C
  D) 350${}^o$C
  Show Answer
  The correct answer is C .
• Question 43: A radio is operated by eight cells each of e.m.f. 2.0V connected in series. If two of the cells are wrongly connected, the net e.m.f. of the radio is Options:
  A) 8V
  B) 10V
  C) 12V
  D) 16V
  Show Answer
  The correct answer is C .
• Question 44: Two capacitance of 6$\mu$F and 8$\mu$F are connected in series. What additional capacitance must be connected in series with this combination to give a total of 3$\mu$F Options:
  A) 3$\mu$F
  B) 16$\mu$F
  C) 24$\mu$F
  D) 30$\mu$F
  Show Answer
  The correct answer is C .
• Question 45:

  

  The acceleration of the system show above is

  Options:
  A) 2ms^-2
  B) 4ms^-2
  C) 6ms^-2
  D) 8ms^-2
  Show Answer
  The correct answer is B .
• Question 46: A cone in an unstable equilibrium has its potential energy Options:
  A) decreased
  B) increased
  C) unchanged
  D) oscillating
  Show Answer
  The correct answer is B .
• Question 47: Which of the following does NOT describe the image formed by a plane mirror? Options:
  A) erect
  B) laterally inverted
  C) same distance from mirror as object
  D) magnified
  E) virtual
  Show Answer
  The correct answer is D .
• Question 48: The lack of power of accommodation which is mainly due to the hardening of the eye lens and is usual with onset of old age is called? Options:
  A) myopia
  B) hypermyopia
  C) presbyopia
  D) astigmatism
  E) eye ring
  Show Answer
  The correct answer is C .
• Question 49: Heat is supplied to a test tube containing 100g of ice at its melting point. The ice melts completely in 1 min.What is the power rating of the source of heat? [Latent heat of fusion of ice = 336Jg^-1] Options:
  A) 336W
  B) 450W
  C) 560W
  D) 600W
  Show Answer
  The correct answer is C .
• Question 50: In a fission process, the decrease in mass is 0.01%. How much energy could be obtained from the fission of 0.1g of the material Options:
  A) $9.0\times {10}^{9}J$
  B) $9.0\times {10}^{10}J$
  C) $6.3\times {10}^{11}J$
  D) $9.0\times {10}^{11}J$
  Show Answer
  The correct answer is A .