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 2631: 200g of water at 90^oC is mixed with 100g of water at 30^oC. What is the final temperature? Options:
  A) 50^oC
  B) 60^oC
  C) 70^oC
  D) 80^oC
  Show Answer
  The correct answer is C .
• Question 2632: Which of the following instruments can be used to measure current in an a.c circuit? Options:
  A) Hot wire ammeter
  B) Moving coil ammeter
  C) Tangent galvanometer
  D) Moving coil galvanometer
  Show Answer
  The correct answer is D .
• Question 2633:

  

  Four resistors R1, R2, R3 and R4 are connected in series as shown above, V1, V2, V3 are voltmeters connected as indicated above. Which of the following relations is correct??

  Options:
  A) V1 = V3 =V2/2
  B) V1 = 2V2 = V3
  C) V1=1/2V3 =V3
  D) V2 - V1 = V3
  Show Answer
  The correct answer is A .
• Question 2634: A satellite is in a parking orbit if its period is Options:
  A) less than the period of the earth
  B) more than the period of the earth
  C) equal to the period of the earth
  D) the square of the period of the earth
  Show Answer
  The correct answer is C .
• Question 2635: A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms^-1] Options:
  A) 1320m
  B) 660m
  C) 400m
  D) 330m
  E) 165m
  Show Answer
  The correct answer is B .
• Question 2636: Which of the following radiations have the longest wavelength? Options:
  A) Gamma rays
  B) Infra-red
  C) Light waves
  D) Radio waves
  E) Ultra-violet rays
  Show Answer
  The correct answer is D .
• Question 2637: if ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆P_x is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as Options:
  A) ∆x ∆P_x ≥ h
  B) ∆x ∆P_x = 0
  C) ∆x ∆P_x< h
  D) ∆x ∆P_x = ∞
  Show Answer
  The correct answer is A .
• Question 2638: What are the units of thermal conductivity? Options:
  A) kg.m.sec²
  B) Joule sec^-1m^-1k^-1
  C) kg.m
  D) Newton sec^-1m²
  E) m³
  Show Answer
  The correct answer is B .
• Question 2639: If the distance between the plates of a parallel plate capacitor is decreased, its capacitance Options:
  A) becomes zero
  B) decreases
  C) increases
  D) is halved
  E) remains the same
  Show Answer
  The correct answer is C .
• Question 2640: A man standing 300m away from the wall sounds a whistle. The echo from the wall reaches him 1.8sec. later, calculate the velocity of sound in air Options:
  A) 540.0ms^-1
  B) 333.3ms^-1
  C) 270.0ms^-1
  D) 166.7ms^-1
  E) 83.3ms^-1
  Show Answer
  The correct answer is B .