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 1231:

  

  Fig 4 represents a block-and-tackle pulley system on which an effort of W newtons supports a load of 120.0N if the efficiency of the system is 40% then the value of W is

  Options:
  A) 28.0N
  B) 48.0N
  C) 50.0N
  D) 288.0N
  Show Answer
  The correct answer is C .
• Question 1232:

  A piano wire 50 cm long has a total mass of 10 g and its stretched with a tension of 800 N. Find the frequency of the wire when it sounds its third overtone note.

  Options:
  A) 800 Hz
  B) 600 Hz
  C) 400 Hz
  D) 200 Hz
  Show Answer
  The correct answer is A .
• Question 1233: An object is placed 15cm in front of a concave mirror of radius 40cm. The image formed Options:
  A) virtual and 60cm behind the mirror
  B) real and 60cm behind the mirror
  C) virtual and at infinity
  D) real and at infinity
  E) virtual and 40cm from the mirror
  Show Answer
  The correct answer is A .
• Question 1234: Which of the following is an essential physical property of the wires used for making fuses? Options:
  A) low density
  B) high thermal conductivity
  C) low electrical resistivity
  D) low melting point
  Show Answer
  The correct answer is D .
• Question 1235:

  

  In the diagram above, the hanging mass m2 is adjusted until m1 is on the verge of sliding. The coefficient of static friction between the mass m1 and the table is

  Options:
  A) m1/m2
  B) m1g/m2
  C) m2/m1
  D) m2g/m1
  Show Answer
  The correct answer is C .
• Question 1236: A parachute attains a terminal velocity when Options:
  A) its density is equal to the density of air
  B) the viscous force of the air and the upthrust completely counteract its weight
  C) it expands as a result of reduced external pressure
  D) the viscous force of the air is equal to the sum of the weight and upthrust
  Show Answer
  The correct answer is B .
• Question 1237:

  In what range oftemperature is the expansion of water anomalous?

  Options:
  A) +208${}^o$C to +212${}^o$C
  B) -80${}^o$C + -76${}^o$C
  C) 0${}^o$C to +4${}^o$C
  D) -4${}^o$C to +0${}^o$C
  Show Answer
  The correct answer is C .
• Question 1238: A body is projected from the earth's surface with the intention of letting it escape from the earth's gravitational field. What is the minimum escape velocity of the body? [Earth's radius = 6.4 x 10³km, g = 10ms^-2] Options:
  A) 14 kms^-1
  B) 13 kms^-1
  C) 12 kms^-1
  D) 11 kms^-1
  Show Answer
  The correct answer is D .
• Question 1239:

  

  In the diagram above, which of the angles ${\theta }_1$ , ${\theta }_2$ , ${\theta }_3$ and ${\theta }_4$ is the angle of deviation of the ray of light passing through the glass prism XYZ?

  Options:
  A) ${\theta }_3$
  B) ${\theta }_2$
  C) ${\theta }_1$
  D) ${\theta }_4$
  Show Answer
  The correct answer is C .
• Question 1240: Which of the following is common to evaporation and boiling? They Options:
  A) take place at any temperature
  B) are surface phenomena
  C) involve change of state
  D) take place at a definite pressure
  Show Answer
  The correct answer is C .