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2017 WAEC CHOCKS: Free Physics Objectives And Theory Questions And Answers Now Available

2017 WAEC CHOCKS: Free Yoruba, Igbo And Hausa Language Questions And Answers
SCHEDULE:


Monday, 10th April, 2017

Physics 2 (Essay) 09.30am - 11.00am
Physics 1 (Objectives) 11.00am - 12.15pm


PLEASE NOTE: EARLY SUBSCRIPTION HELPS!!!!!!!!!!!!!
Send your cards a day before the exam or very early in the morning to avoid stories that touches!

OUR ANSWER LINK: Gurusprovince Answer Page

2017 WAEC CHOCKS: Free Physics Objectives And Theory Questions And Answers Now Available

OBJECTIVES ANSWERS

VERIFIED PHYSICS OBJ 
1B
2D
3C
4A
5D
6A
7A
8A
9B
10B
11B
12B
13D
14C
15B
16D
17C
18-
19C
20D
21A
22B
23C
24D
25C
26C
27C
28D
29A
30C
31A
32C
33C
34B
35C
36D
37A
38B
39B
40C
41A
42A
43D
44D
45A
46A
47D
48B
49D
50C

WAEC 2017 PHYSICS ANSWER BY GURUSPROVINCE TEAM


1)
decrease in height (h)
increase in time (t)
this shows that distance changes with time

===========================

2)
given that U=15m3^-1
R=U* sqr2h/g
h=20m
g=10
R=15*sqr2*20/10
R=15*sqr40/10
R=15*sqr4
R=15*2=30m
R=30m

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3 )
i ) Brownian motion
ii ) Atomic size
iii ) Expansion

============================

5a)
i)force
ii)length

5b)
By increasing the density mosquitoes lavrva than the density of water

=================================


6)
(i)Energy efficient- so far the best light for interior lighting.

(ii)Low production cost (of tubes, not of the ballasts)

(iii)Long life of tubes.

=========================

7 )
i ) It requires low voltage sources for it to function
ii ) It cannot be easily broken
iii ) It is cheaper and quite easy to manufacture

============================

8b)If their distance and masses are doubled their corresponding force would also be doubled and the work done respectively 
I.e.Workdone=Force * distance
Force= Mass * Acceleration 
W= Mg * d
     |
Increase

8c) -Acceleration due to gravity
- At maximum height, final velocity is zero

8d (i)pushing someone on a swing.
      (ii)Tuning a radio to a particular frequency.

=========================

10a) A wave front is an imaginary  surface passing through the points of a medium oscillatory in phase


============================

12ai)Nuclear fission is a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.

12aii)a)A graphite reactor is a nuclear reactor that uses carbon as a neutron moderator, which allows un-enriched uranium to be used as nuclear fuel.

12aii)b)Boron rods are used in
nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.
=============================
11a A dielectric is an electrical insulator that can
be polorised by an applied electric field.
11aii) GIVEN: A = 9.6 * 10^-3 M^2
d = 2.25 * 10^4
Eo = 8.85 * 10^-12 F/m
Er = 900
C = /
using; C = EoErA/d
capacity, C = 8.85*10^-12 * 900 * 9.6*10^-3/2.25
* 106-4
C = 33984 * 10^-11
C = 3.3984 8 10^7 F
C =0.344F
11bi) A voltmeter has a higher resistance because
it is designed to limit the flow of current to
practically zero to avoid voltage drop or less
across it.
11bii) combined resistance Rt
Rt = (400 * 400/400 + 400) + (800 * 800/800+
800)
Rt = 200 + 400
Rt = 600ohms
current supplied by battery = r/Rt
= 6/600
= 0.01A
voltage drop across the resistance = 200 * 0.01
=2V
therefore the voltage reading is 6 -2
= 4V






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