NECO Physics Exam Past Questions and Answers

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 471: The distance between two successive crests of a water wave is 0.5m. If a particle on the surface of the water wave makes two complete vertical oscillations in 1s, calculate the speed of the wave. Options:
  A) 0.25ms^-1
  B) 0.50ms^-1
  C) 1.00ms^-1
  D) 2.00ms^-1
  E) 4.00ms^-1
  Show Answer
  The correct answer is C.
• Question 472: A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C. Options:
  A) 6.0Ω
  B) 6.42Ω
  C) 7.6Ω
  D) 8.4Ω
  E) 16.0Ω
  Show Answer
  The correct answer is C.
• Question 473: The resistance of a series R-C circuit is 5 ω If the impedance of the circuit is 13 ω calculate the reactance of the capacitor Options:
  A) 12 Ω
  B) 14 Ω
  C) 16 Ω
  D) 18 Ω
  E) 65 Ω
  Show Answer
  The correct answer is A.
• Question 474: A wire of length 100cm and cross-sectional area 2.0 × 10^-3cm² has a resistance of 0.10 ω. Calculate its electrical conductively. Options:
  A) 2.0 × 10-6 ω^-1cm^-1
  B) 5.0 × 10-5 ω^-1cm^-1
  C) 2.0 × 106 ω^-1cm^-1
  D) 5.0 × 106 ω^-1cm^-1
  E) 5.0 × 107 ω^-1cm^-1
  Show Answer
  The correct answer is B.
• Question 475: A converging lens of focal length 5cm forms a virtual image which is 20cm from the lens. How far from the lens is the object? Options:
  A) 2.0cm
  B) 4.0 cm
  C) 6.7cm
  D) 20.0cm
  E) 25.0cm
  Show Answer
  The correct answer is B.
• Question 476: The resistance in a series R-C circuit is 5 Ω. If the impedance of the circuit is 13 Ω, calculate the reactance of the capacitor Options:
  A) 65 Ω
  B) 18 Ω
  C) 16 Ω
  D) 14 Ω
  E) 12 Ω
  Show Answer
  The correct answer is E.
• Question 477: The distance between two successive crests of a water is 1m. lf a particle on the surface of the water makes two complete vertical oscillations in 1 second, calculate the speed of the wave Options:
  A) 0.5 ms^-1
  B) 1.0 ms^-1
  C) 2.0ms^-1
  D) 3.0ms^-1
  E) 4.0ms^-1
  Show Answer
  The correct answer is C.
• Question 478: A converging lens of focal length 5cm forms a virtual image which is 10cm from the lens. How far from the lens is the object? Options:
  A) 2.0cm
  B) 3.3cm
  C) 5.0cm
  D) 10.0cm
  E) 15.0cm
  Show Answer
  The correct answer is E.
• Question 479: The inside of a vacuum flask is usually coated with silver to reduce heat lost by Options:
  A) convection
  B) conduction
  C) radiation
  D) absorption
  E) evaporation
  Show Answer
  The correct answer is C.
• Question 480: A platinum-resistance thermometer has a resistance of 59 at 0^oC and 9Ω at l00^oC. Assuming that resistance changes uniformly with temperature, calculate the resistance of the thermometer when the temperature is 45^oC Options:
  A) 13.9 Ω
  B) 8.9 Ω
  C) 6.8 Ω
  D) 3.2 Ω
  E) 1.8 Ω
  Show Answer
  The correct answer is C.