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 661: One of the conditions necessary for an object to be in equilibrium when acted upon by a number of parallel forces is that the vector sum of the forces is Options:
  A) Average
  B) Zero
  C) Negative
  D) Positive
  Show Answer
  The correct answer is B .
• Question 662: A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is Options:
  A) 1 . 25 x 10⁴ W
  B) 2 . 50 x 10⁴ W
  C) 1 . 25 x 10⁶W
  D) 2 . 50 x 10⁶ W
  Show Answer
  The correct answer is B .
• Question 663: the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is Options:
  A) 3
  B) 1.5
  C) 1.32
  D) 1
  E) 0.67
  Show Answer
  The correct answer is E .
• Question 664: In a closed organ pipe producing a musical note, an antinode will always be produced at Options:
  A) the closed end
  B) the open end
  C) the middle
  D) all the parts of the pipe
  Show Answer
  The correct answer is B .
• Question 665:

  A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil. If the input voltage is 100 volts, the output voltage is

  Options:
  A) 5 volts
  B) 10 volts
  C) 15 volts
  D) 20 volts
  Show Answer
  The correct answer is B .
• Question 666: Satellite communication network makes use of? Options:
  A) visible light
  B) sound wave
  C) radio wave
  D) infra-red wave
  Show Answer
  The correct answer is C .
• Question 667: When the brakes in a car are applied, the frictional force force on the tyres is Options:
  A) is a disadvantage because it is in the direction of the motion of the car
  B) is a disadvantage because it is in the opposite direction of the motion of the car
  C) is an advantage because it is in the direction of the motion of the car
  D) is an advantage because it is in the opposite direction of the motion of the car
  Show Answer
  The correct answer is D .
• Question 668: The note produced by a stretched string has a fundamental frequency of 400Hz. If the length of the string is doubled while the tension in the string is increased by a factor of 4, the frequency is Options:
  A) 200Hz
  B) 400Hz
  C) 800Hz
  D) 1600Hz
  Show Answer
  The correct answer is B .
• Question 669: An inclined plane which makes an angle of 30^o with the horizontal has a velocity ratio of Options:
  A) 2
  B) 1
  C) 0.866
  D) 0.50
  Show Answer
  The correct answer is A .
• Question 670: The instrument that measures both a.c and d.c is? Options:
  A) a current balance
  B) a moving current ammeter
  C) a moving iron ammeter
  D) an inverter
  Show Answer
  The correct answer is C .