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This is actually the 2018 Waec Gce Physics answers. Answers as questions sent to our subscribers on WHATSAPP, if you are looking for 2020 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
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(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
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(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
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(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
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(1a)
Young modulus of a material or the modulus of elasticity.
(1b)
Potential Energy to kinetic Energy.
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(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
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(3)
(i) Optical fibres have extremely high bandwidth
(ii) They have longer transmission distance
(iii) They have resistance to electromagnetic interference
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(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.
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(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
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Waec and neco are similar exams. ... They both test what you have been taught in secondary school. Therefore, you can use the same books, past questions and syllabus to prepare for both waec and neco.
Yes! It is possible to combine WAEC and NECO result for admission into any tertiary institutions in Nigeria. Many universities in Nigeria allow for the combination of both WAEC and NECO result.
NECO seems less difficult compared to WAEC but not also easy to make A's.
You can use WAEC GCE, NECO GCE, NABTEB GCE to gain admission into UNILAG. And any possible combination is acceptable by the university.
The answer is yes. NECO can be used to study abroad but not all schools abroad accept it. ... First of all, an applicant with a NECO result must sit for a proficiency English language exam such as GRE, IELTS, SAT, ACT, PSAT, TOEFL, GMAT, and the likes.
The answer is yes. NECO can be used to study abroad but not all schools abroad accept it. ... First of all, an applicant with a NECO result must sit for a proficiency English language exam such as GRE, IELTS, SAT, ACT, PSAT, TOEFL, GMAT, and the likes.
The fact is your O'level result; be it WAEC , NECO or NABTEB is valid for a life time and has no expiration date. The Examination conducted by these examination bodies is known as ?achievement test? and therefore the certificates awarded are valid forever.