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 1041:

  An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?

  Options:
  A) 3 days
  B) 2 days
  C) 1 day
  D) 4 days
  Show Answer
  The correct answer is B .
• Question 1042: High Tension(H.T.) transmission means Options:
  A) to transmit a given amount of power, the tension in the conducting wire must be high
  B) heat is not lost when current is passed through a conductor
  C) heat is gained when a given power is transmitted
  D) a big transformer is required to transmit power
  E) trasmission of power at low current and high voltage
  Show Answer
  The correct answer is E .
• Question 1043:

  The half life of a radioactive material is 12 days. Calculate the decay constant.

  Options:
  A) 0.8663 $da{y}^{-1}$
  B) 0.04331 $da{y}^{-1}$
  C) 0.17325 $da{y}^{-1}$
  D) 0.05775 $da{y}^{-1}$
  Show Answer
  The correct answer is D .
• Question 1044:

  A projectile is fired from the ground level with a velocity of 300ms^-1 at an angle of a 30^o to the horizontal.

  Calculate the time taken to reach the maximum height?

  [g = 10ms^-2]

  Options:
  A) 30s
  B) 20s
  C) 25s
  D) 15s
  Show Answer
  The correct answer is D .
• Question 1045:

  In an AC circuit, resonance occurs when the impedance of the circuit is:

  Options:
  A) Zero
  B) Maximum
  C) Equal to the capacitive reactance of the circuit
  D) Minimum
  Show Answer
  The correct answer is D .
• Question 1046: Which of the following will convert a milliammeter to a voltmeter? Options:
  A) low series resistance
  B) low parallel resistance
  C) high series resistance
  D) high parallel resistance
  E) parallel resistance equal to milliammeter resistance
  Show Answer
  The correct answer is C .
• Question 1047:

  The electrolyte used in the Nickel-Iron (NiFe) accumulator is

  Options:
  A) dilute tetraoxosulphate(VI) acid
  B) barium chloride solution
  C) potassium hydroxide solution
  D) sodium hydroxide solution
  Show Answer
  The correct answer is C .
• Question 1048: Two capacitors R₁ = 4$\mathrm{\Omega }$ and R₂ = 5$\mathrm{\Omega }$ are connected in parallel across a potential difference. If P₁ and P₂ represent power dissipated in R ₁ and R₂ respectively, then the ratio P₁ : P₂ is Options:
  A) 4 : 5
  B) 5 : 4
  C) 16 : 25
  D) 25 : 16
  Show Answer
  The correct answer is B .
• Question 1049: Two resistors 5Ω and 10Ω are arranged first in series and later in parallel to a 24V source, the ratio of total power dissipated in the series and parallel arrangements respectively is Options:
  A) 5:3
  B) 1:50
  C) 50:1
  D) 3:5
  E) No Correct Option
  Show Answer
  The correct answer is E .
• Question 1050:

  A lorry accelerates uniformly in a straight line with acceleration of $4m{s}^{-}2$ and covers a distance of 250 m in a time interval of 10 s. How far will it travel in the next 10 s?

  Options:
  A) 650
  B) 900
  C) 800
  D) 250
  Show Answer
  The correct answer is A .