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 971: The magnitude of the resultant of two mutually perpendicular forces, F₁ and F₂ is 13N, if the magnitude of F₁ is 5N, what is the magnitude of F₂? Options:
  A) 2.6N
  B) 6.0N
  C) 12.0N
  D) 18.0N
  Show Answer
  The correct answer is C .
• Question 972:

  The pin-hole camera produces a less sharply defined image when the

  Options:
  A) pin-hole is larger
  B) illumination is less
  C) screen is further from the pin-hole
  D) object is further from the pin-hole
  Show Answer
  The correct answer is A .
• Question 973:

  

  The diagram shown 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 machine is 40, then the value of W is?

  Options:
  A) 28.0
  B) 48.0N
  C) 233.0N
  D) 50.0N
  Show Answer
  The correct answer is D .
• Question 974:

  If a body moves with a constant speed and at the same time undergoes an acceleration, its motion is said to be

  Options:
  A) circular
  B) oscillatory
  C) rectilinear
  D) rotational
  Show Answer
  The correct answer is A .
• Question 975:

  If a sound wave goes from a cold air region to a hot air region, its wavelength will?

  Options:
  A) increase
  B) decrease
  C) decrease then increase
  D) remain constant
  Show Answer
  The correct answer is A .
• Question 976: Flourescent tubes produces light by the Options:
  A) excitation of gas molecules
  B) conduction of solar energy
  C) refraction of light by gas molecules
  D) thermal agitation of electron in the tubes
  Show Answer
  The correct answer is A .
• Question 977: Heat is supplied uniformly at the rate of 100W to 1.0 x 10^-2kg of a liquid for 20 seconds. If the temperature of the liquid rises by 5^oC, then the specific heat capacity of the liquid is Options:
  A) 2.0 x 10²Jkg^-1k^-1
  B) 2.0 x 10²Jkg^-1
  C) 4.0 x 10⁴Jkg^-1k^-1
  D) 4.0 x 10⁴kg^-1
  E) 8.4 x 10³Jkg^-1k^-1
  Show Answer
  The correct answer is C .
• Question 978: Dewpoint is the temperature at which, water vapour in the atmosphere Options:
  A) turns into steam
  B) solidifies into ice pellets
  C) first condenses into liquid form
  D) is just sufficient to cause cooling
  E) has a relative humidity of fifty percent
  Show Answer
  The correct answer is D .
• Question 979: 2 kg of water is heated with a heating coil which draws 3.5 A from a 200 V mains for 2 minutes. what is the increase in temperature of the water?
  [specific heat capacity of water = 4200 jkg ^-1k^-1] Options:
  A) 30°
  B) 25°
  C) 15°
  D) 10°
  Show Answer
  The correct answer is D .
• Question 980: A pencil is placed vertically between a concave mirror and its focal point. The image of the pencil in the mirror will be Options:
  A) real, inverted and diminished
  B) virtual, inverted and enlarged
  C) real, erect and enlarged
  D) virtual, erect and enlarged
  Show Answer
  The correct answer is D .