# NECO Physics Question 2021 Objective and Theory Latest Update

Filed in Exam on August 11, 2021

Are you a student searching for NECO physics past questions? Well, search no more. Here are Neco physics questions and answers, objective and theory answers for NECO June/July 2021. Carefully go through this post

The National Examinations Council (also known as NECO) is an examination body in Nigeria that conducts the Senior Secondary Certificate Examination and the General Certificate in Education.

NECO was created by former Head of State Abdulsalami Abubakar in April 1999. It was the first Federal organization to offer subsidized registration to academic candidates in Nigeria.

1. Calculate the distance covered by a car that travels at an average speed of 100kmh-1in 5minutes.

A) 500km

B) 3kmh-1

C) 500kmh-1

D) 30,000km

E) 3km

The correct answer is E. 8.3km. See the solution in the No.1 question in the theory section.

2) Which of the following is not a type of motion?

A) Random motion

B) Relative motion

C) Translational motion

D) Rotational motion

E) Oscillatory

The correct answer is B. Relative motion

3. The S.I unit of the moment of a force is___?

A) Kgm-1

B) Nm

C) Jm-1

D) Nm-1

E) Nmm-1

The correct answer is B. Nm

4) A stationary ball is hit by an average force of 50N for a time range of 0.03sec. Calculate the impulse experienced by the ball.

A) 5N-sec

B) 0006N-sec

C) 1666N-sec

D) 5sec

E) 1N-sec

The correct answer is A. 1.5N-sec

5) ___________ is the change of position of a body with time?

A) Gravity

B) Friction

C) Force

D) Motion

The correct answer is D. Motion

6) A body of mass 3.0kg moves with a velocity of 10ms-1. Calculate the momentum of the body.

A) 0Nms-1

B) 0kgNs-1

C) 0kgms-1

D) 0mms-1

E) 0kms-1

The correct answer is C. 30.0kgms-1.

7) Calculate the acceleration of an unbalanced force of 20N acts on a 4.0kg mass.

A) 5ms-1.

B) 6ms-1.

C) 5Ns-1.

D) 5mms-1.

E) 5kgms-1.

The correct answer is A. 5ms-1.

8) A rocket is burning fuel at the rate of 200gs-1and ejecting all the gas in one direction at the rate of 400ms-1. What is the maximum weight the rocket can have if it is going to move vertically upwards?

A) 60N

B) 5N

C) 2N

D) 80N

E) 80Ns-1

The correct answer is D80N. See the solution in the theory section

9) What are the magnitudes of two Forces (Force A & B) acting at a point at right angles, if their resultant force is 50N and their summed force 70N?

A) 50N and 20N

B) 40N and 30N

C) 45N and 25N

D) 20N and 40N

E) 60N and 10N

10) If a band is played on the moon, the sound will_____________?

A) reverberate

B) be heard by us faintly

C) be heard up to 10km from it

D) not be heard at any distance at all from it

The correct answer is D) not be heard at any distance at all from it

### Solved Answers to NECO Theory Questions 2020 Samples

Some of the OBJ questions above have been completely solved in this NECO physics theory sample questions answers section.

So, follow the steps below and see how each of the questions is solved. Take note of the steps used in solving them.

1. Calculate the distance covered by a car that travels at an average speed of 100kmh-1in 5minutes.

Solving the solution to question one:

Firstly, convert the speed from kmh-1 to km per minute since the time is in minutes. Thus; 100km per hour = 100/60km per minute.

The formula: Speed = distance/time, but make distance the subject of the formula since we are calculating for distance. Therefore, Distance = speed X time

100/60 x 5 = 8.3km Ans.

2. Calculate the acceleration of an unbalanced force of 20N acts on a 4.0kg mass.

Solving the solution to question two:

Formula; F = ma

Where F =20N, and M=4.0kg; therefore 20N = 4a; 20/4 = 4/4

Making “a” the subject of the formula, we have; a = 5ms-1 Ans.

3. A body of mass 3.0kg moves with a velocity of 10ms-1. Calculate the momentum of the body.

Solution:

P=mv

=3 x 10

30.0kgms-1

#### Important Physics Formulas and Terminologies

• Speed = distance/time
• Velocity = displacement/time
• Acceleration = Change in velocity/time taken for the change

#### Try the following questions by yourself:

1. Define Kinetic energy and give its formula.
2. What is boiling
3. Give the boiling points of the following liquids;
• Water
• Alcohol
1. When is work said to be done?
2. Calculate the work done by a man who pushes a load of mass 50kg, through a plane incline at 300 to the ground over a distance of 12m [Take the force of gravity (g)=10m/s2

### NECO Past Questions and Answers for Physics 2021

The following are sample questions gotten from past questions. Study and take note of their answers in case you come across similar questions in the exam.

1. Which of the following describes the working principle of a washing machine?

A) reverse osmosis

B) diffusion

D) dialysis

The correct answer is C) centrifugation

2. The Unit at which Nuclear sizes are expressed is known as _____?

A) Fermi

B) Angstrom

C) Newton

D) Tesla

The correct answer is A), Fermi

3. In which of this medium will the speed of light be minimum When passing through?

A) water

B) vacuum

C) Air

D) Glass

The correct answer is: D) Glass

4. All the following are vector quantities, Except_______?

A) speed

B) velocity

C) torque

D) displacement

The correct answer is A) speed

5. Which of the following will an Air bubble in water act like?

A) convex lens

B) convex mirror

C) concave lens

D) concave mirror

The Correct Answer is C) concave lens

6. Which of the bulbs will fuse if Two electric bulbs say 25W – 220V & 100W – 220V are connected in series to a 440V power supply?

A) 25 W

B) Both

C) 100 W

D) Neither

The correct answer is A) 25 W

7. Why is the core of an electromagnet made of soft iron____? because it has:

A) small susceptibility and small retentivity

B) large susceptibility and small retentivity

C) large density and large retentivity

D) small density and large retentivity

The correct answer is B) large susceptibility and small retentivity

8.Which of the following Term are the Masses of stars and galaxies usually expressed?

A) neutron mass

B) earth’s mass

C) solar mass

D) lunar mass

The Correct Answer is C) Solar Mass

9. Which of the following effects governs the working of the quartz crystal in the watch?

A) Piezoelectric Effect

B) Edison Effect

C) Photoelectric Effect

D) Johnson Effect

Correct Answer is A) Piezoelectric Effect

NECO Physics Theory Questions 2020

1. (a) A student makes a model of an atom. The model contains 24 electrons, 25 protons and 26 neutrons. Some of these particles are inside a nucleus at the centre of the model.
(i) Determine the nucleon number (mass number) of the atom.
(ii) Explain why the model represents a charged atom.
(iii) The student makes a new model of a different isotope of the same element. Describe the nucleus of this new model.

Ans: 1 (a)
(i) 51 B1
(ii) more protons than electrons or different numbers of protons and electrons positive and negative do not cancel.
(iii) 25 protons. a different number of neutrons.

2. Fig. 1.1 shows the distance-time graph for two cyclists A and B. They start a 500 m race together but finish the race at different times.

(a) Use Fig. 1.1 to determine
(i) the distance between A and B at time t = 20s,
(ii) the difference in the time taken by A and B for the race.

(b) Cyclist C starts the race at the same time as A and B and covers the first 200m of the race at a constant speed of 5.0 m/s. He then accelerates and finishes the race at t = 60s.
(i) On Fig. 1.1, draw the distance-time graph for cyclist C.
(ii) Calculate the average speed of cyclist C for the whole race.

Ans: (a) (i) 60 m
(ii) 12s
(b) (i) straight line from the origin to 200 m at 40s any line straight or curved from (40,200) to (60,500)
(ii) s = d/t or 500/60 = 8.3m/s

Note: There is nothing like Neco Physics Expo online. Neco Ssce candidates are to desist from patronizing online fraudsters/vendors who say they can provide such services as they are not real.

DISCLAIMER! These are not real NECO Physics questions but likely repeated questions over the years to help candidate understand the nature of their examinations. Ensure to take note of every questions provided on this page.

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