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# NECO Physics Questions and Answers 2022/2023 | Essay and Objective

NECO Physics Questions and Answers 2022. I will be showing you the NECO Physics objective and theory answers as well as repeated questions for free in this post. You will also understand how NECO Physics questions are set and how to answer them.

The National Examinations Council (NECO) is an examination body in Nigeria that conducts the Senior Secondary Certificate Examination and the General Certificate in Education in June/July and December/January respectively.

## NECO Physics Objectives And Essay Answers 2022(Expo)

NECO Physics OBJ Answers: The Answers will soon be posted here. Be patient we are solving.

1-10 ECDABCCEBA

11-20 AABBEACCCE

21-30 CEECCBCBDB

31-40 DCAEDBCDCB

51-60 CCCBEECBBD

(1a)

(i) Tubes, fins or passages for conducting or directing the heat transfer fluid from the inlet to the outlet.

(ii) Abserver plate which may be flat, corrugated or grooved with tubes, fins or passages attached to it.

(1b)

NigeriaSat-1 is a micro satellite used in monitoring disasters managements and various mapping campaign WHILE NigercomSat-1 is a mega satellite responsible for creating an enabling environment for competition among operators in the industry as well as ensuring the provision of qualitative and efficient telecommunications services

(1c)

V = image

U = Object

V = 2u

1/f₀ = (1/V) + (1/u)

1/f₀ = (1/2u) + (1/u)

1/f₀ = (1+2)/2u

1/f₀ = 3/2u

f₀ = 2u/3

Magnification = (V/f₀ + 1)

M = [2u/(2u/3)] + 1

M = [(2u/1) x (3/2u)] + 1

M = 3 + 1

M = 4

(2a)

scalar quantities;they have magnitude but no direction and they are added by ordinary algebraic methods. WHILE vector quantities; they have both magnitude and direction and they are added by geometrical methods.

(2b)

r²=3²+4²

=9+16

=25

r=✓25

r=5n

(3i)

The principle of floatation states that when an object floats in a liquid the buoyant force/upthrust that acts on the object is equal to the weight of the object.

Weight of the object (W) = upthrust (F)

(3ii)

(i) Volume of the object

(ii) Density of the liquid

(4i)

E= mgh = 40 X 10 X 0.3 X 6= 720J

(4ii)

P= mgh/t

m= PT/GH= 60 X 12 / 10 X 0.3 X 6 = 40g

(5a).

Positive charge: This type of charge can be produced by rubbing a glass rod with silk.

(5b)

P₁ = 600mmHg

V₁ = 500cm³

T₁ = 23°C + 273.15 = 296.15K

T₂ = 37°C + 273.15 = 310.15K

P₂ = 720mmHg

V₂ =?

P₁V₁/T₁ = P₂V₂/T₂

V₂ = (P₁V₁T₂)/T₁P₂

V₂ = (600 x 500 x 310.15)/(296.15 x 720)

V₂ = (93045000)/213228

V₂ = 436.36cm³

(6a)

Transverse wave particles of waves move perpendicular in the direction of the wave while in longitudinal waves particles move horizontally in the direction of the wave.

(6b)

(i) Water waves

(ii) Sound waves

(7)

(i) The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.

(ii)

– Kaleidoscope

– Periscope

(7i)

{PICK ANY ONE}

(i) The angle between the incident ray and the normal is equal to the angle between the reflected ray and the normal.

(ii) The incident ray, the normal and the reflected ray are all in the same plane.

(iii) The incident ray and the reflected ray are on different sides of the normal

(7ii)

{PICK ANY TWO}

(i) Colorimeter

(ii) spectrophotometer

(iii) Periscope

(iv) kaleidoscope

(8a)

Resistivity of a wire is the resistance per unit length and cross-sectional area. It is the property of the material that opposes the flow of charge or the flow of electric current. The unit of resistivity is ohm metre. We know that R = ρ L / A.

(8b).

R = ρ L / A.

ρ = R A /L

A = ρ L / R

A= 3.0 x 10^-6 x 4 / 0.5

A = 1.2 x 10^-5 / 0.5

A = 2.4 x 10^-5 m²

(12a)

(i) It makes walking and running possible.

(ii) It enables gripping of belt in machines possible.

(iii) It enables nails to stay in the wall when driven.

(12b)

(i) It always resists the motion, so extra energy is required to overcome it.

(ii) It causes wear and tear of machines.

(iii) It decreases the life expectancy of moving parts of vehicles.

———————————————————————————–

The questions below are the NECO 2022 Physics Practice Questions. Go through them and be ready to score high in your NECO 2022 Physics Examination.

1. The equation X15062 => Y150 63 + -1 + energy, represents

A. Alpha decay

B. Beta-decay

C. Gamma decay

D. Photon emission

2. The ice and steam points of a thermometer are 20mm and 100mm respectively. A temperature of 75 degree celsius corresponds to Y mm on the thermometer. What is Y?

A. 100 mm

B. 70 mm

C. 80 mm

D. 60 mm

3. When a yellow card is observed through a blue glass, the card would appear as

A. Black

B. Green

C. Red

D. White

4. In a nuclear plant, the final mass of the products is 6.32×10^-27kg, while the initial mass of the reactant is 6.30×10^-27kg, the energy released in the process is (speed of light in vacuum 3.0×10^8m/s, 1eV = 1.6×10^-19J)

A. 11.25meV

B. 11.25 MJ

C. 12.25MJ

D. 12.25meV

5. A 1.5kg stone was thrown vertically upward with an initial velocity of 42m/s, What is the potential energy of the stone at the highest point reached.

A. 3.15J

B. 13.23J

C. 26.46J

D. 63.00J

6. When two objects P and Q are supplied with the same quantity of heat, the temperature change in p is observed to be twice that of Q. The mass of P is half that of Q. The ratio of the specific heat of P to Q is

A. 1:4

B. 4:1

C. 1:1

D. 2:1

7. The following statements were made by some students describing what happened during the determination of the melting point of solids

1. The temperature of the solid was constant until melting started

2. The temperature of the solid rose until melting started

3. During melting, the temperature was rising

4. During melting, the temperature was constant

5. The temperature continued to rise after all the solid had melted.

6. The temperature stopped rising after all the solid had melted. Which of the following gives correct statements in the right order?

A. 2, 4 and 5

B. 2, 3 and 6

C. 1, 3 and 6

D. 1, 3 and 5

ANSWER: A (2, 4, and 5)

8. A silver spoon and a wooden spoon are both at room temperature. The silver spoon is cooler to touch because silver

A. has a greater density

B. can be polished

C. is a less absorbent material than wood

D. is a better conductor of heat

ANSWER: D (is a better conductor of heat)

See: NECO Timetable

## NECO Physics Essay Questions

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 number 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 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

### Neco Physics Objective Sample Questions;

If a satellite travels at a constant speed round the earth in a circular orbit,

1. Which of the quantities in the list below are scalars.
(a) acceleration (b) force (c) mass (e) speed.

2. The velocity of the satellite changes, but its speed is constant. State what is meant by velocity…………………….

3. Explain why the velocity changes……………………………

4. Explain what makes this satellite move in an orbit that is circular

#### Have a Target and Work Towards Actualizing it

You have decided to pass NECO Physics 2022 and I am sure of that. Now, the next thing you should do is set targets.

You have told yourself, “I will score A in Neco Physics 2022”, that’s not all. You need to plan on how to make it happen. Create a timetable and master plan to achieve your goals.

#### Get the Recommended Textbook on Physics  for 2022 NECO Examination

Normally, NECO recommends books for the examination. But apart from NECO English Literature where certain novels are compulsory, you are free to use any good English Language textbook to prepare for NECO 2022 exam.

Some textbooks are more difficult to understand. If you have any topic you are finding difficult to understand, then get a textbook that will simplify the topics and make life better for you.

#### Do not Skip Physics Examples and Exercise you Will Come Across While Reading:

Many candidates are fond of skipping exercises and even examples while studying textbooks. In fact, we like notebooks so much that we could ask, “can I read my notebook and pass NECO Physics 2022?” Don’t be scared of attempting exercises in Biology. Face the challenges.

Note: The above questions are likely NECO Physics Questions and Answers, not the real questions

If you have any questions about the NECO Physics Questions and Answers 2022, kindly drop your question in the comment box.

Last Updated on July 29, 2022 by Admin

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