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 61: The atmospheric pressure due to water is 1.3 x 10⁶Nm^-2. What is the total pressure at the bottom of an ocean 10m deep? [Density of water = 1000kgm^-3, g = 10ms^-2] Options:
  A) 1.3 x 10⁷Nm^-2
  B) 1.4 x 10⁶Nm^-2
  C) 1.4 x 10⁵Nm^-2
  D) 1.0 x 10 ⁵Nm^-2
  Show Answer
  The correct answer is B .
• Question 62: Which of the following devices may be used to step up the voltage in a d.c. circuit? Options:
  A) a step-up transformer
  B) a d.c. generator
  C) a wattmeter
  D) an induction coil
  Show Answer
  The correct answer is B .
• Question 63: What is the acceleration due to gravity 'g' on the moon, if g is 10^-2 on the earth? Options:
  A) 0. 10 ms^-2
  B) 0.74ms^-2
  C) 1.6ms^-2
  D) 10.00ms^-2
  Show Answer
  The correct answer is C .
• Question 64: What is the total electrical energy consumed by using an electric cooker rated 1000W for 5 hrs? Options:
  A) 5.3 x 10³J
  B) 6.5 X 10³J
  C) 1.8 X 10⁷J
  D) 2.3 X 10⁷J
  Show Answer
  The correct answer is C .
• Question 65:

  

  A body is under action of a force F such that the force displacement graph of the body is semi circular as shown above. The work done on the body by the force in moving through 24 meters is

  Options:
  A) 36π J
  B) 72π J
  C) 144π J
  D) 288π J
  Show Answer
  The correct answer is B .
• Question 66:

  The lower fixed part of a faulty thermometer reads 2°C while the upper fixed point is 100°C.

  What is the true temperature when the thermometer reads 51°C?

  Options:
  A) 52°C
  B) 50°C
  C) 49°C
  D) 46°C
  Show Answer
  The correct answer is B .
• Question 67: At 35°C and 5 atmospheres pressure the density of a gas is 0. 600g per liter. What is the density at 7 atmospheric pressure and 350°C. Options:
  A) 0.27g / liters
  B) 0.25g / liters
  C) 17g / liters
  D) 0.15g / liters
  Show Answer
  The correct answer is C .
• Question 68: The plane mirrors in a kaleidoscope are usually placed Options:
  A) at an angle of 60^o
  B) parallel to one another
  C) perpendicular to one another
  D) at an angle of 45^o
  Show Answer
  The correct answer is A .
• Question 69: If the maximum voltage across a 100ohms resistor is 20V, then the maximum power it can dissipate is Options:
  A) 5.00W
  B) 4.00W
  C) 2.00W
  D) 25W
  Show Answer
  The correct answer is B .
• Question 70: A cell of emf 1.5V is connected in series with a 1Ω resistor and a current of 0.3A flows through the resistor. Find the internal resistance of the cell Options:
  A) 4.0Ω
  B) 3.0Ω
  C) 1.5Ω
  D) 1.0Ω
  Show Answer
  The correct answer is A .