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 2281:

  Which of the following statements are TRUE of isotopes?

  I. Isotopes of an element have the same chemical properties because they have the same number of electrons

  II. Isotopes of elements are normally separated using physical properties

  III. Isotopes of an element have the same number of protons in their nuclei

  Options:
  A) I and II only
  B) I and III only
  C) II and III only
  D) I, II and III
  Show Answer
  The correct answer is B .
• Question 2282: The heat produced in a conductor carrying an electric current is Options:
  A) inversely proportional to the current and the resistance
  B) directly proportional to the current, resistance and the time
  C) inversely proportional to of the resistance, current and the time
  D) directly proportional to the square of the current, the resistance and the time
  Show Answer
  The correct answer is D .
• Question 2283:

  A 500W heater is used to heat 0.6kg of water from 25^oC to 100^oC in t₂ seconds. If another 1000W heater is used to heat 0.2kg of water from 10^oC to 100^oC in t, seconds, find $\frac{t_1}{t_2}$

  Options:
  A) 50
  B) 5
  C) 5/4
  D) 1/5
  Show Answer
  The correct answer is D .
• Question 2284: 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 .
• Question 2285:

  

  A Uniform beam PQ of mass 20kg and length 5m is balanced as shown above, a man of weight 800N stands at M such that QM = 2m. The reaction at P and Q respectively are(take g = 10ms^-2)

  Options:
  A) 300N and 500N
  B) 420N and 580N
  C) 220N and 380N
  D) 580N and 420N
  E) 382N and 220N
  Show Answer
  The correct answer is B .
• Question 2286: A solid weights 5.0 N in air, 4.2 N in water and 4.4 N in liquid Y. Calculate the relative density of liquid Y. Options:
  A) 0.75
  B) 0.88
  C) 0.95
  D) 1.13
  E) 1.33
  Show Answer
  The correct answer is A .
• Question 2287: If the fundamental frequency of a closed pipe organ on a day when the speed of sound is 340ms^-1 is 170Hz, then the length of the pipe is Options:
  A) 50cm
  B) 70cm
  C) 100cm
  D) 150cm
  E) 200cm
  Show Answer
  The correct answer is A .
• Question 2288: 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 2289:

  A certain radioactive source emits radiation that was found to be deflected by both magneticand electric fields. The radiation is?

  Options:
  A) beta rays
  B) gamma rays
  C) x-rays
  D) ultra-violet rays
  Show Answer
  The correct answer is A .
• Question 2290: A radioactive source emits X–rays of very short wavelength (10 ^-13m ) what is the frequently of these rays? Options:
  A) 2 × 10¹⁸HZ
  B) 3 × 10 ¹⁹HZ
  C) 3 × 10²¹HZ
  D) 3 × 10^-19HZ
  Show Answer
  The correct answer is C .