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 761:

  

  The diagram above shows a maximum and minimum thermometer divided into three portions P, Q and R. Which of the following is true about the respective content of P,Q and R

  Options:
  A) Alcohol, mercury and alcohol
  B) Air, alcohol and mercury
  C) Mercury, alcohol and mercury
  D) Air, mercury and alcohol
  Show Answer
  The correct answer is A .
• Question 762:

  A 35 kΩ is connected in series with a resistance of 40 kΩ. What resistance R must be connected in parallel with the combination so that the equivalent resistance is equal to 25 kΩ?

  Options:
  A) 40 kΩ
  B) 37.5 kΩ
  C) 45.5 kΩ
  D) 30 kΩ
  Show Answer
  The correct answer is B .
• Question 763:

  A magnet relay is a device used for?

  Options:
  A) reading the magnitude of magnetic flux
  B) controlling another circuit carrying larger current
  C) turning in sports
  D) storing magnetic field
  Show Answer
  The correct answer is B .
• Question 764:

  

  A body of mass 40kg is being dragged along the floor by a rope inclined at 60 degrees to the horizontal. The frictional force between the box and the floor is 100N and the tension on the rope is 300N. How much work is done by dragging the box for a distance of 4m

  Options:
  A) 680J
  B) 400J
  C) 200J
  D) 100J
  Show Answer
  The correct answer is C .
• Question 765: A cell of e.m.f 2V and internal resistance 1$\mathrm{\Omega }$ supplies a current of 0.5 amps to a resistance whose value is Options:
  A) 0.5$\mathrm{\Omega }$
  B) 1$\mathrm{\Omega }$
  C) 2$\mathrm{\Omega }$
  D) 2.5$\mathrm{\Omega }$
  E) 3$\mathrm{\Omega }$
  Show Answer
  The correct answer is E .
• Question 766: A milliameter with full scale deflection of 10mA has an internal resistance of 5 ohms. It would be converted to an ammeter with a full scale deflection of 1A by connecting a resistance of Options:
  A) $\frac{5}{99}$ohms in series with it
  B) $\frac{5}{99}$ohms in parallel with it
  C) $\frac{99}{5}$ohms in series with it
  D) $\frac{99}{5}$ohms in parallel with it
  E) 2 ohms in series with it
  Show Answer
  The correct answer is B .
• Question 767: A lamp is rated 240V, 60W. The resistance of the filament is Options:
  A) 960$\mathrm{\Omega }$
  B) 16$\mathrm{\Omega }$
  C) 15$\mathrm{\Omega }$
  D) 4$\mathrm{\Omega }$
  Show Answer
  The correct answer is A .
• Question 768: A plane inclined at an angle at 30^o to the horizontal has an efficiency of 50%. The force parallel to the plane required to push a load of 120 N uniformly up the plane is Options:
  A) 40√3N
  B) 60N
  C) 120N
  D) 200N
  E) 240N
  Show Answer
  The correct answer is C .
• Question 769:

  

  In the figure above, XY is of length 1m, The value of R at balance point Z is

  Options:
  A) 3.0Ω
  B) 13.3Ω
  C) 15.0Ω
  D) 30.0Ω
  Show Answer
  The correct answer is D .
• Question 770:

  

  PQRS is rectangular cell with PQ perpendicular to the magnetic field as shown above. If a current flows in the the direction PQRS in what direction will the coil move

  Options:
  A) Upwards
  B) Downwards
  C) TOwards The North Pole
  D) Towards The South Pole
  Show Answer
  The correct answer is A .