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 1381: What is X in the equation given below? 42He + 94Be → 126C + X Options:
  A) electron
  B) hydrogen
  C) lithium
  D) neutron
  E) proton
  Show Answer
  The correct answer is D .
• Question 1382: The wavelength of ultraviolet radiation is 400nm. If the speed of light in air is 3 x 10⁸ms^-1, then the frequency of the ultraviolet radiation is Options:
  A) 1.3 x 10¹⁵Hz
  B) 7.5 x 10⁵Hz
  C) 1.2 x 10¹¹Hz
  D) 7.5 x 10¹⁴Hz
  Show Answer
  The correct answer is B .
• Question 1383:

  Efficiency of conduction in liquids and gases compared to solids is

  Options:
  A) less efficient than solid
  B) more efficient than solids
  C) equally efficient to solids
  D) efficiently may vary
  Show Answer
  The correct answer is A .
• Question 1384: 4g of a radioactive material of half-life 10 days is spilled on a laboratory floor. How long would it take to disintegrate 3.5g of the material? Options:
  A) 1$\frac{1}{4}$ days
  B) 8$\frac{1}{4}$ days
  C) 30 days
  D) 80 days
  Show Answer
  The correct answer is C .
• Question 1385:

  

  The value of F in the figure above when in equilibrium is

  Options:
  A) 10N
  B) 12N
  C) 20N
  D) 27N
  Show Answer
  The correct answer is C .
• Question 1386: Which of the following is TRUE of light and sound waves? Options:
  A) they both transmit energy
  B) they both need a mediumfor propagation
  C) they are both transverse waves
  D) their velocities in air are equal
  Show Answer
  The correct answer is A .
• Question 1387: A uniform meter rule weighing 0.5N is to be pivoted on a knife-edge at the 30cm-mark. where will a force of 2N be placed from the pivot to balance the meter rule? Options:
  A) 95cm
  B) 25cm
  C) 20cm
  D) 5cm
  Show Answer
  The correct answer is B .
• Question 1388: The cost of running five 60 W lamps and four 100 W lamps for 20 hours if electrical energy cost #10.00 per kwh is Options:
  A) 280.00
  B) 160.00
  C) 120.00
  D) 140.00
  Show Answer
  The correct answer is D .
• Question 1389:

  If a sound wave goes from a cold air region to a hot air region, its wavelength will?

  Options:
  A) increase
  B) decrease
  C) decrease then increase
  D) remain constant
  Show Answer
  The correct answer is A .
• Question 1390: 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 .