Keep refreshing in every five minutes starting from three hours to the exam
This is actually the 2018 Waec Gce Physics answers. Answers as questions sent to our subscribers on WHATSAPP, if you are looking for 2021 WAEC/NECO Answers midnight before the exam, try contacting us.
(12a)
(i) Cosmic rays
(ii) Rocks and soils
(12b)
Because the mass of a radioactive isotope decreases exponentially. Also, the source and intensity of radiation differs.
(12c)
(i) Dielectric materials
(ii)
(12d)
(i) Alpha radiation
(ii) Beta radiation
====================================
(6a)
(i) It can cause short and long term sun burn effects.
(ii)It can cause blindness when flashed to the eyes.
(6b) Energy = hf
= 6.60×10^-34 × 4.82×10^14
= 3.18×10^-19J
= 1.99ev
=====================================
(7)
V = 2Ï€R/T
R = 9.6×10^6 + 6.4×10^6 =16×10^6 m
T = 24hrs =(24×60×60)s
V = 2×3.142×16×10^6/24×60×60
V = 1162.96m/s
=========================================
(11a)
Lenz's law states that an induced current is in such direction that it's magnetic effect opposes the change by which the current is induced.
(11b)
(i) Magnets are used in construction of speakers.
(ii) They are used to store data in computers.
(iii) Used in magnetic resonance imaging machines.
(11ci)
(a) Two coils: So as to produce an induced current from one coil to the other.
(b) an iron core: To increase the strength of the magnetic field.
(11cii)
(11d)
Total resistance in series
Rt = R1 + R2
= 500 + 400
Rt = 900ohms
Taking E = 6v
E = V + ir
E = VR + Ir
E = I ( R + r)
I = E/R + r
taking r = 200ohms
I = 6/900+200
I = 6/1100
I = 0.005A
Hence the voltmeter reading
V = IR
= 0.005 × 200
= 1.09v
===================================
(1a)
Young modulus of a material or the modulus of elasticity.
(1b)
Potential Energy to kinetic Energy.
=========================================
(2)
e = 0.7m
m=60 × 10-³kg = 6.0×10-²kg
K = 200Nm-¹
W = 1/2ke² = 1/2mv²
1/2ke² = 1/2mv²
V² = ke²/m = 200×0.7²/6.0×10-²
V² = 98×10²/6
V² = 16.33×10²
V = √1633
V = 40.4
Speed = 40.4ms-¹
====================================
(3)
(i) Optical fibres have extremely high bandwidth
(ii) They have longer transmission distance
(iii) They have resistance to electromagnetic interference
=========================================
(4a)
It is used in geometric stations used to move a satellite from low earth orbit into a geostationary orbit.
(4b)
Polar orbit satellite is used in earth mapping.
===========================================
(5a)
(i) Centripetal force
(ii) Centrifugal force
(5b)
Ft = mDv
where F = force
t = time
Dv = change in velocity
m = mass of object
Hence F = mDv/t
2021 Neco Specimen | 2021 Neco 2021 NECO SPECIMEN | 2021 NECO SPECIMENS PRACTICAL ON PHYSICS
Get all your questions answered about the 0ne-time-only NECO exams for free and get a schedule of events. We will also help you with mock runs, tips on how best to prepare for the exam and even what to wear during the whole process
Are you attempting the 2021 National Examinations Council (NECO) Senior Secondary School Examination (SSCE)? If yes, you can download or copy the timetable for the exam from this page.
2021 NECO Science Specimens: 2021 Complete NECO Specimens. 2021 NECO Specimen | 2021 SPECIMEN for NECO
Best Waec Expo runz site 2021, ARE YOU LOOKING FOR A PERFECT SOURCE FOR YOUR EXAM SUCCESS IN waec?, we provides real waec questions and answers.
2021 Waec Science Specimens: 2021 Complete WAEC Specimens. 2021 Waec Specimen | 2021 SPECIMEN for WAEC
2021 NABTEB: NABTEB TIMETABLE FOR 2021/2021 ACADEMIC YEAR PDF DOWNLOAD. 2021 NABTEB TIMETABLE: 2021/2022 NABTEB TIMETABLE Free Download
Joint Admissions and Matriculation Board (JAMB) Form 2021 › See Registration Instructions and Guidelines. JAMB begins 2021 UTME registration, sets June 5 for examination
This is 2021 WAEC Practical Specimens. Are you looking for WAEC specimen 2021? this page is all about 2021 WAEC Practical Specimens: 2021 WAEC Specimen - 2021 WAEC Science Specimens .