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 1931: Lenz's law is a law of conservation of Options:
  A) electric charge
  B) electric current
  C) Energy
  D) Momentum
  Show Answer
  The correct answer is C .
• Question 1932: Calculate the velocity ratio of a screw jack of pitch 0.3cm if the length of the tommy bar is 21cm Options:
  A) $\frac{1}{140}$$\pi$
  B) 14$\pi$
  C) 70$\pi$
  D) 140$\pi$
  Show Answer
  The correct answer is D .
• Question 1933:

  A 20-toothed gear wheel drives a 60-toothed one. If the angular speed of the smaller wheel is 120 rev s^-1, the angular speed of the larger wheel is

  Options:
  A) 3 rev s^-1
  B) 40 rev s^-1
  C) 360 rev s^-1
  D) 2400 rev s^-1
  Show Answer
  The correct answer is B .
• Question 1934:

  The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 180Hz?

  Options:
  A) 4
  B) 3
  C) 2
  D) 1
  Show Answer
  The correct answer is B .
• Question 1935:

  In order to view the sun, the most suitable instrument to use is?

  Options:
  A) helioscope
  B) telescope
  C) stroboscope
  D) sun meter
  Show Answer
  The correct answer is A .
• Question 1936: Two inductors of inductances 5 mll and 15 mll are connected in series and a current of 5A flows through them. the total energy stored in the inductor is Options:
  A) 500.0J
  B) 250.0J
  C) 62.5J
  D) 50.0J
  E) no correct option
  Show Answer
  The correct answer is E .
• Question 1937: A solid weigh 10 .00 N in air, 6 N when fully immersed in water and 7 . 0 N when fully immersed in a liquid X. Calculate the relative density of the liquid, X. Options:
  A) 5/3
  B) 4/3
  C) 3/4
  D) 7/10
  Show Answer
  The correct answer is C .
• Question 1938: An electric kettle with negligible heat capacity is rated at 2000W. If 2.0kg of water is put in it, how long will it take the temperature of water to rise from 20^OC to 100^OC? [specific heat capacity of water = 4200Jkg^-1k^-1] Options:
  A) 420S
  B) 336S
  C) 168S
  D) 48S
  Show Answer
  The correct answer is B .
• Question 1939: The correct unit of energy density is? Options:
  A) kg m³ s^-2
  B) kg m² s^-2
  C) kg m^-3 s^-2
  D) kg m^-1 s^-2
  Show Answer
  The correct answer is D .
• Question 1940: The distance travelled by a particle starting from rest is plotted against the square of the time elapsed from the commencement of motion. The resulting graph is linear, the slope of this graph is a measure of Options:
  A) initial displacement
  B) initial velocity
  C) acceleration
  D) half the acceleration
  E) half the initial velocity
  Show Answer
  The correct answer is C .