This page contains NECO Physics 2023 answer keys. If you’ve been looking for an expo to help you pass the NECO Physics 2023/2024 exam, your search is over. We have all the answers to both objective and essay questions, as well as other exam information for the NECO 2023 exam.
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Contents
Objective and Essay for NECO Physics Questions and Answers 2023
The June/July 2023 Expo Runz Real and Verified NECO Physics (Obj and Essay/Theory) Questions and Answers are available for your review.
All NECO Physics questions have been thoroughly answered and will be uploaded to this page shortly. If you really want all the answers at your fingertips, continue reading to discover what is required.
Because our team has taken the time to answer all of the questions in NECO Physics 2023, you can rest assured that the answers you’ll receive from us will lead to A’s in your final grade.
Physics NECO Questions and Answers Objectives and Theory for 2023
If you are still looking for answers to 2023 NECO Physics theory and OBJ questions, your search is over; in a moment, our team will upload 2023 NECO Physics theory and OBJ answers for all students who are interested. See below for answers to NECO Physics objective and essay questions.
Objective and Theory NECO Physics Answers 2023
You must first comprehend the nature of these examinations. The National Examination Council (NECO) of Nigeria administers the NECO Physics Objective and Theory Questions and Answers for 2023.
In Nigeria, the Senior Secondary Certificate Examination and the General Certificate in Education are administered by the National Examination Council (NECO) in June/July and November/December, respectively.
Keep in mind that the 2023 NECO Physics questions are derived from the SS1-SS3 Physics curriculum for those inquiring about specialty areas.
Once our team uploads the answers to the free NECO Physics expo questions 2023, we advise students to frequently refresh this page so they can be among the first to utilize them.
Keep refreshing this page, as we will definitely update this page as soon as the Latest 2023 Physics Questions and Answers are out…
In the meantime, go through these past questions and Answers for the previous years because they are likely questions for NECO Physics 2023.
Physics NECO Past Questions and Answers 2022
1-10 ECDABCCEBA
11-20 AABBEACCCE
21 -30 CEECCBCB
31-40 DCAEDBCDCB
41-50 ADACCACEEB
51-60 CCCBEECB
The inner diameter of a test tube can be measured accurately using a?
A. micrometer screw guage
B. pair of dividers
C. metre rule
D. pair of vernier calipers
Two bodies have masses in the ratio 3:1. They experience forces which impart to them acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced.
A. 1 : 4
B. 2 : 1
C. 2 : 3
D. 2 : 5
Particles of mass 10−2
kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad-1. If the radius of the blade is 0.2m, the centripetal force is
A. 2 N
B. 20 N
C. 200 N
D. 400 N
A lead bullet of mass 0.05kg is fired with a velocity of 200ms−1
into a lead block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is
A. 50 J
B. 100 J
C. 150 J
D. 200 J
A ball of mass 0.1kg is thrown vertically upwards with a speed of 10ms-1 from the top of a tower 10m high. Neglecting air resistance, its total energy just before hitting the ground is
(take g = 10ms-2)
A. 5 J
B. 10 J
C. 15 J
D. 20 J
A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is
A. 1 . 25 x 104 W
B. 2 . 50 x 104 W
C. 1 . 25 x 106W
D. 2 . 50 x 106 W
When the brakes in a car are applied, the frictional force force on the tyres is
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
If the stress on a wire is 107NM-2 and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young’s modulus of the wire is
A. 5 . 0 x 104 Nm-2
B. 5 . 0 x 105 Nm-2
C. 2 . 0 x 108 Nm-2
D. 2 . 0 x 109 Nm-2
A solid weigh 10 .00 N in air, 6 N when fully immersed in water and 7 . 0 N when fully immersed in a liquid X. Calculate the relative density of the liquid, X.
A. 5/3
B. 4/3
C. 3/4
D. 7/10
When temperature of a liquid increases, its surface tension
A. Decreases
B. Increases
C. Remain Constant
D. Increases then decreases
A gas at a volume of V0 in a container at pressure P0 is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?
A. P0/5
B. 4P0/5
C. P0
D. 5P0
A piece of substance of specific head capacity 450JKg-1K-1 falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms-2]
A. 2/9°C
B. 4/9°C
C. 9/4°C
D. 9/2°C
I. A liquid boils when its saturated vapour pressure is equal to the external pressure
II. Dissolved substances in pure water lead to increase in the boiling point.
III. When the external pressure is increased, the boiling point increases.
IV. Dissolved substances in pure water decrease the boiling point.
Which combination of the above are peculiarities of the boiling point of a liquid?
A. I, II and III
B. I, II, III and IV
C. I, II and IV
D. II, III and IV
The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20°C and 80°C respectively is
A. 3.0 x 102Km-1
B. 3.0 x 103Km-1
C. 5.0 x 103Km-1
D. 3.0 x 104Km-1
Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss;
Specific heat capacity of copper = 400JKg-1K-1
Latent heat of fusion of ice = 3.3 x 105JKg-1
A. 8/33kg
B. 33/80kg
C. 80/33kg
D. 33/8kg
The equation of a wave traveling along the positive x-direction is given by;
y = 0.25 x 10−3
sin (500t – 0.025x).
Determine the angular frequency of the wave motion.
A. 0.25 x 10-3rad s-1
B. 0.25 x 10-1rad s-1
C. 5.00 x 102rad s-1
D. 2.50 x 103rad s-1
If a sound wave goes from a cold air region to a hot air region, its wavelength will
A. increase
B. decrease
C. decrease then increase
D. remain constant
The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40hz and 180Hz?
A. 4
B. 3
C. 2
D. 1
A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is
A. 3m
B. 5m
C. 6m
D. 10m
The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a
A. concave mirror of focal length 5cm
B. concave mirror of focal length 10cm
C. convex mirror of focal length 5cm
D. convex mirror of focal length 20cm
Physics NECO answers to Theory 2022 Questions
(1a)
I Tubes, fins, or passages for directing the heat transfer fluid from the inlet to the outlet.
(ii) Abserver plate, which may be flat, corrugated, or grooved and may contain tubes, fins, or passages.
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(1b)
NigeriaSat-1 is a microsatellite utilized for disaster management monitoring and various mapping campaigns. WHILE NigercomSat-1 is a megasatellite responsible for fostering an environment conducive to industry-wide competition and ensuring the provision of high-quality 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
Question (2a) (2a)
Scalar quantities have magnitude but no direction and are added using conventional algebraic procedures. While vector quantities possess both magnitude and direction and are added using geometrical techniques.
(2b)
r²=3²+4²
9+16=25
r=✓25
r=5n
Question (3i) (3i)
According to the principle of floatation, when an object floats in a liquid, the buoyant force/upthrust acting on the object is equal to the object’s weight.
Weight (W) of the object equals thrust (F)
(3ii)
I Volumetric capacity
(ii) Specific gravity of the liquid
Question (4i) (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 generated by rubbing silk against a glass rod.
(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) (296.15 x 720)
V₂ = (93045000)/213228
V₂ = 436.36cm³
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Question (6a)
(6a)
Transverse wave particles move perpendicular to the wave’s direction, whereas longitudinal wave particles move horizontally in the wave’s direction.
(6b)
I Oceanic waves
(ii) Acoustic waves
Question (7) (7)
I According to the law of reflection, when a ray of light reflects off a surface, the angle of incidence and angle of reflection are equal.
(ii)Kaleidoscope
Periscope
(7i)
{PICK ANY ONE}
I The angle formed by the incident ray and the normal coincides with the angle formed by the reflected ray and the normal.
(ii) The incident, normal, and reflected rays all lie within the same plane.
(iii) The incident and reflected rays are on opposite sides of the normal.
(7ii)
“CHOOSE ANY TWO”
I Colorimeter
(ii) spectrophotometer
(iii) Periscope
(iv) kaleidoscope
Question (8a)
8a)
Resistance per unit length and cross-sectional area is the resistivity of a wire. It is the material’s characteristic that opposes the flow of charge or electric current. The resistivity unit is the ohm meter. We are aware that R = 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
Question (9a) (9a)
It allows walking and running to be possible.
(ii) It makes it possible for machines to grip belts.
It permits nails to remain in the wall when driven.
(9b)
It always resists motion, requiring additional energy to overcome.
(ii) It causes machine wear and tear.
(iii) It reduces the lifespan of moving vehicle components.
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