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 1441: Which of the following statement is TRUE of ultraviolet, visible and infra-red rays? Options:
  A) they are all electromagnetic waves with the same wavelength
  B) ultra-violet rays have shorter wavelengths than infra-red rays and produce flourescence
  C) infrared rays have shorter wavelength than visible light and produce the sensation of heat
  D) the wavelenghts increase in the sequence: visible, ultra-violet, infra-red
  Show Answer
  The correct answer is B .
• Question 1442:

  Which of the following statements is/are correct for a freely falling body?

  I. the total is entirely kinetic

  II. the ratio of potential energy to kinetic energy is constant

  III. the sum of potential and kinetic energy is constant

  Options:
  A) I only
  B) II only
  C) III only
  D) I and III only
  Show Answer
  The correct answer is C .
• Question 1443: A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil.If the input voltage is 100 volts, the output voltage is Options:
  A) 5 volts
  B) 10 volts
  C) 15 volts
  D) 20 volts
  E) 25 volts
  Show Answer
  The correct answer is B .
• Question 1444: If the pressure on 100cm³ of an ideal gas is doubled while its kelvin temperature is halved, then the new volume of the gas will become Options:
  A) 25cm³
  B) 50cm³
  C) 100cm³
  D) 200cm³
  E) 400cm³
  Show Answer
  The correct answer is A .
• Question 1445: The mechanism of heat transfer from one point to another through the vibration of the molecules of the medium is Options:
  A) covection
  B) conduction
  C) radiation
  D) diffusion
  Show Answer
  The correct answer is B .
• Question 1446: After three half lifes, the fraction of a radioactive material that has decayed is Options:
  A) $\frac{1}{8}$
  B) $\frac{1}{3}$
  C) $\frac{2}{3}$
  D) $\frac{7}{8}$
  Show Answer
  The correct answer is D .
• Question 1447: An object of mass 400g and density 600kgm^-3 is suspended with a sting so that half of it is immersed in paraffin of density 900kgm^-3. The tension in the string is Options:
  A) 1.0N
  B) 3.0N
  C) 4.0N
  D) 5.0N
  Show Answer
  The correct answer is B .
• Question 1448:

  

  In the figure above, M and N are insulated metal spheres in contact. A negatively charged ebonite rod P is I brought near M. When M and N are Separated and the rod is taken away, which of the following statements is correct

  Options:
  A) both M and N have acquired negative charges
  B) both M and N have acquired positive charges
  C) M has acquired negative charge and N positive charge
  D) N has acquired negative charge and M positive charge
  Show Answer
  The correct answer is D .
• Question 1449:

  

  The diagram above shows the prism arrangement in a

  Options:
  A) binocular
  B) spectrometer
  C) periscope
  D) projector
  Show Answer
  The correct answer is C .
• Question 1450: In a meter bridge experiment, two resistor 2$\mathrm{\Omega }$ and 3$\mathrm{\Omega }$ occupy the left and right gaps respectively. Find the balance point from the left side of the bridge Options:
  A) 20cm
  B) 40cm
  C) 60cm
  D) 80cm
  Show Answer
  The correct answer is B .