SELECT CATEGORY

CLICK HERE TO JOIN OUR WHATSAPP GROUP

FOR QUESTIONS AND ENQUIRES CONTACT MR. HASSAN ON WHATSAPP 08057635105

WAEC TIMETABLE FOR (MAY/JUNE) 2019/2020

OUR ANSWER PAGE 2019 COMPLETE WAEC SPECIMEN
CLICK HERE TO VIEW OUR ANSWER PAGE
CLICK HERE TO VIEW COMPLETE WAEC SPICIMEN
2019 NECO UPDATE
Dear Visitor, Are u Writing 2019 NECO EXAM ?
Click Here to Submit your Phone Number for Free Answers

       

« | »

WAEC 2019 PHYSICS PRACTICAL VERIFIED ANSWERS

(1aviii)
In a tabular form
Under y(cm)
20.0, 30.0, 40.0, 50.0, 60.0

Under t(s)
36.61, 33.66, 31.32, 28.62, 25.93

Under T = t/20(s)
1.8305, 1.6830, 1.5660, 1.4310, 1.2965

Under T²(s²)
3.3507, 2.8325, 2.4524, 2.0478, 1.6809

(1ax)
Slope s = ΔT²/Δy
S = 4 – 2.5/0 – 39
S = 1.5/-39
S = -0.0385

Intercept, C = 4.0

(1axi)
SR = c
R = c/s = 4/-0.0385 = -103.9

(1axii)
(i) I ensured that the retort stand was well clamped.
(ii) I avoided error due to parallax when reading the metre rule.

(1bi)
Draw the diagram
(α) K.E is maximum
(β) acceleration is maximum

(1bii)
Period, T = 2π√m/k
Given : weight, W = 120N
Mass = w/g = 120/10 = 12
T = 45
π = 3.142
4 = 2(3.142)√12/k
0.6365 = √12/k
Square both sides
0.405 = 12
K = 12/0.405 = 29.6

(1)
CLICK HERE FOR THE GRAPH 

++++++++++++++++++++++

(3ai)
E.m.f, E = 3.00v

(3avii)
In a tabular form
Under R(ohms)
2.0, 5.0, 10.0, 12.0, 15.0, 20.0

Under V(v)
0.86, 0.62, 0.43, 0.38, 0.32, 0.25

Under V-¹(v-¹)
1.1628, 1.6129, 2.3256, 2.6316, 3.1250, 4.0000

(3aix)
Slope s = ?R/?v-¹
=17.5 – 4.25/3.5 – 1.5
=13.25/2
=6.625

Intercept, C = -5.75

(3ax)
S = Ro?
6.625 = 0.85(?)
? = 6.625/0.85 = 7.79

C = -(Ro + ?)
= -5.75 = -(0.85 + ?)
? = 5.75 – 0.85
? = 4.9

(3axi)
(i) I ensured tight connections.
(ii) I avoided error due to parallax when reading the voltmeter.

(3bi)
Vab = 12 – 8 = 4v
Rab = 4×5/4+5 = 20/9ohms
Iab = Vab/Rab = 4/20/9 = 4 ×9/20 = 9/5
=1.8A

Power = I²ab Rab
=1.8² * 20/9
= 7.2watts

(3bii)
Current in line = power/voltage = 3600/240
=15A
Circuit breaker remain closed because current in line is less than 20A


(3)
CLICK HERE FOR THE GRAPH


(3x)
(i) I avoided parallax error when taking readings from the voltmeter
(ii) I ensured that the key was opened when reading is not been taking 

CLICK HERE TO JOIN OUR WHATSAPP GROUP

READ  WAEC 2019 CATERING CRAFT PRACTICE VERIFIED ANSWERS

Posted by on May 2, 2019.

Tags:

Categories: WAEC

Feel Free To Drop Your Comments Below

0 Responses

Leave a Reply

« | »