NECO PhysicsPast Questions & Explanations

Practice 358+ NECO Physics questions from the SuperPrep question bank. Every question comes with a full explanation so you learn the method, not just the answer.

1. 1.

   The SI unit of force is

   1. A.Joule
   2. B.Newton
   3. C.Watt
   4. D.Pascal

   Show explanation

   Force is measured in newtons (N) in the SI system. One newton is the force required to accelerate a 1 kg mass at 1 m/s².

2. 2.

   A force of 20 N moves a body through a distance of 5 m in the direction of the force. Calculate the work done.

   1. A.25 J
   2. B.50 J
   3. C.100 J
   4. D.200 J

   Show explanation

   Work done = Force × Distance = 20 × 5 = 100 J.
3. 3.

   Which of the following is the SI unit of work?

   1. A.Watt
   2. B.Newton
   3. C.Joule
   4. D.Pascal

   Show explanation

   The SI unit of work is the joule (J).
4. 4.

   A machine does 600 J of work in 20 s. What is its power output?

   1. A.12 W
   2. B.20 W
   3. C.30 W
   4. D.12000 W

   Show explanation

   Power = Work ÷ Time = 600 ÷ 20 = 30 W.
5. 5.

   A body of mass 2 kg is raised to a height of 10 m. Take g = 10 m/s². Calculate its gravitational potential energy.

   1. A.20 J
   2. B.100 J
   3. C.200 J
   4. D.400 J

   Show explanation

   Potential Energy = mgh = 2 × 10 × 10 = 200 J.
6. 6.

   What is the kinetic energy of a 4 kg object moving at 5 m/s?

   1. A.25 J
   2. B.50 J
   3. C.75 J
   4. D.100 J

   Show explanation

   KE = 1/2 mv² = 1/2 × 4 × 5² = 50 J.
7. 7.

   A force acts on an object but produces no displacement. The work done is

   1. A.Maximum
   2. B.Negative
   3. C.Positive
   4. D.Zero

   Show explanation

   Work done = Force × Displacement. If displacement is zero, work done is zero.
8. 8.

   The rate of doing work is known as

   1. A.Energy
   2. B.Momentum
   3. C.Power
   4. D.Pressure

   Show explanation

   Power is defined as the rate of doing work.
9. 9.

   A machine with an efficiency of 80% receives 500 J of energy input. What is its useful output energy?

   1. A.100 J
   2. B.250 J
   3. C.400 J
   4. D.625 J

   Show explanation

   Output Energy = 0.8 × 500 = 400 J.
10. 10.

    A 100 W bulb is used for 5 hours. How much energy does it consume?

    1. A.500 Wh
    2. B.20 Wh
    3. C.100 Wh
    4. D.50 Wh

    Show explanation

    Energy = Power × Time = 100 × 5 = 500 Wh.

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11. 11.

    Which form of energy does a stretched spring possess?

    1. A.Kinetic energy
    2. B.Heat energy
    3. C.Elastic potential energy
    4. D.Electrical energy

    Show explanation

    A stretched spring stores elastic potential energy.
12. 12.

    The S.I. unit of length is?

    1. A.Centimeter
    2. B.Meter
    3. C.Kilometer
    4. D.Millimeter

    Show explanation

    The S.I. base unit of length is the meter (m).
13. 13.

    Which of the following is a fundamental physical quantity?

    1. A.Speed
    2. B.Force
    3. C.Mass
    4. D.Acceleration

    Show explanation

    Mass is a fundamental quantity, while the others are derived quantities.
14. 14.

    The instrument used to measure length accurately is?

    1. A.Thermometer
    2. B.Meter rule
    3. C.Barometer
    4. D.Ammeter

    Show explanation

    A meter rule is used to measure length.
15. 15.

    The S.I. unit of time is?

    1. A.Hour
    2. B.Minute
    3. C.Second
    4. D.Day

    Show explanation

    The SI base unit of time is the second (s).
16. 16.

    Which of the following is a derived unit?

    1. A.Meter
    2. B.Kilogram
    3. C.Newton
    4. D.Second

    Show explanation

    Newton is a derived unit of force.
17. 17.

    The S.I. unit of force is?

    1. A.Joule
    2. B.Newton
    3. C.Watt
    4. D.Pascal

    Show explanation

    Force is measured in Newton (N).
18. 18.

    Which instrument is used to measure temperature?

    1. A.Thermometer
    2. B.Barometer
    3. C.Hygrometer
    4. D.Seismometer

    Show explanation

    A thermometer measures temperature.
19. 19.

    The S.I. unit of mass is?

    1. A.Gram
    2. B.Kilogram
    3. C.Pound
    4. D.Ton

    Show explanation

    The SI unit of mass is kilogram (kg).
20. 20.

    Which of the following is NOT a fundamental quantity?

    1. A.Length
    2. B.Time
    3. C.Velocity
    4. D.Mass

    Show explanation

    Velocity is a derived quantity.