2024 NECO GCE Physics Answers

NECO GCE 2024 PHYSICS ANSWERS

PHYSIC-OBJ
01-10: BDDCDEBECB
11-20: BCBDECCDCC
21-30: BBDDBAAEBD
31-40: BABEBEEEDD
41-50: CCABECEABE
51-60: DEBBBDAAEE

COMPLETED….

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“`ANSWER SIX(6) QUESTIONS ONLY“`

(1a)
(i)It is use to provides telecommunications services, including voice, data.
(ii)It is use to provides navigation and remote sensing services, including GPS, mapping.

(1b)
Using a small current for a longer time in electroplating helps to ensure a uniform and smooth deposition of metal onto the surface of the object being plated. A large current for a short time could result in the rapid deposition of metal, which can lead to an uneven, rough, or brittle coating. The smaller current allows for better control over the plating process, leading to a higher-quality, more durable, and more evenly applied finish.

(1c)
Using magnification equation:

M = di/do = hi/ho

where:
M = magnification
hi = image height
ho = object height
di = image distance
do = Object distance

do = di × (ho/hi)

di = 1.6 m
ho = 0.08 m
hi = 0.12 m

do = (1.6 × 0.08) /0.12
do = 1.07m
=======================

(2a)
(i) Lubrication
(ii) Using ball bearings

(2b)
Distance refers to the total length of the path traveled by an object. It is a scalar quantity, measured in units of length (such as meters or kilometers) while Displacement refers to the shortest distance between the initial and final positions of an object. It is a vector quantity, measured in units of length (such as meters or kilometers), and has both magnitude and direction.
=======================

(3a)
(i) A basketball shot towards the hoop.
(ii) A soccer ball kicked into the air.

(3b)
Given:
Number of oscillations = 20
Time taken = 2 minutes = 120 seconds

T = Total time taken / Number of oscillations
= 120s/20
= 6s

ω = 2π / T
= 2π / 6 s
= π/3 rad⁻¹
≈ 1.047 rad⁻¹
=======================

(4a)
Pressure law states that for a fixed mass of gas at constant volume, the pressure of the gas is directly proportional to its absolute temperature.
P∝T = constant

(4b)
The mechanical advantage (MA) of a machine will be equal to its velocity ratio (VR) when there are no energy losses due to friction or other inefficiencies
=======================

(5a)
(i) Electric iron
(ii) Electric kettle

(5b)
Given:
-Mass (m) = 0.4 kg
-Velocity (v) = 10 m/s

Kinetic Energy (KE) is calculated using the formula:

KE = (1/2)mv²
= (1/2) × 0.4 kg × (10 m/s)²
= (1/2) × 0.4 kg × 100 m²/s²
= 20 J
=======================

(6a)
(i)Aperture
(ii)Diaphragm

(6b)
(i)Sound production: A flute produces sound when air is blown through it, causing a vibration in the air column inside the instrument. A talking drum, on the other hand, produces sound when struck with a stick or mallet, causing the drumhead to vibrate.
(ii)Instrument type: A flute is a woodwind instrument, while a talking drum is a percussion instrument.
(iii)Origin and usage: Flutes are used in various forms of music worldwide, while talking drums are traditionally used in African music and communication.
=======================

(7a)
(i) Microphone
(ii) Receiver

(7b)
Number of images (n) = (360° / Angle of inclination (θ)) – 1

Given that the number of images (n) is 14:
14 = (360° / θ) – 1
15 = 360/θ
θ = 360/15
θ = 24°
=======================

(13a)
(i)Wheelbarrow
(ii)Nutcracker

(13b)
(i) Elastic and inelastic collision: Both types of collisions conserve momentum.
(ii) Conduction and convection: Both are modes of heat transfer.

(13ci)
(i)Narrow temperature range (usually 35°C to 42°C)
(ii)Fine graduations (usually 0.1°C)

(13cii)
Diagram

(13di)
Quantity of heat required:
Q = mcΔT
= 780 JK⁻¹ × (95°C – 30°C)
= 780 JK⁻¹ × 65 K
= 50700 J
= 50.7 kJ

(13dii)
Mass of the copper rod:
m = Q / (c × ΔT)
= 50700 J / (390 Jkg⁻¹K⁻¹ × 65 K)
≈ 2 kg