Neco Gce 2017 Physics Obj And Essay Solution Answer – Nov/Dec Expo

NECO GCE Physics Obj And Essay/Theory Questions and Answer – NOV/DEC 2017 Expo Runz.

SUBJECT: NECO GCE PHYSICS AND PIN IS ""
REFRESH PAGE

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2.00 pm – 5.00 pm
Physics OBJ:
1-10 DEEBCDEBCA
11-20 DECBCABCDE
21-30 EADACDCAAB
31-40 BDBDDCBAAA
41-50 ECEACCBDED
51-60 CBCCDECCBA

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SECTION B - ANSWER 4 QUESTIONS
12a)
15ai)
Electrical conductivity the degree to which a specified material conducts electricity, calculated as the ratio of the
current density in the material to
the electric field which causes the
flow of current.
15aii)
-Low internal resistance Rechargeable
-Has high voltage (2.0V)
-Supply higher current

15bi)
-To prevent it from rusting
15bii)
-the magnetic field is made stronger
-the area of the coil is mereased

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i)It’s weight
ii) The upthrust of the fluid to which it fluts
12bi)
Draw a table
Fundamental quantites:
-Velocity
-Time

derived quantity:
-Density
-Electric current

12bii)
i) Reducing the contact between the surfaces.
ii) Application of grease

12ci)
a=15/4
a=3.75m/5^2
12cii)
total distance travelled
j=ut+1/2
a+2=0*4+1/2*3.75*(4)^2
0+1/2*3.75*8
a=30m/s

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SECTION A - ANSWER 6 QUESTIONS(COMPLETED)
1ai)
-Regular maintenance is essential to keep machines and the work environment safe and reliable.
-It helps to eliminate workplace hazards.
1aii) Electrolysis can be used for electroplating of metals. expand in length by a fraction

1b)
I=m/zt=0.0015/3.3*10^-7*2400
I=0.0015/3.3*10^-7*24*10^3
I=0.0015/7.92*10^-4
I=1.5*10^-3/7.92*10^-4
I=0.19*10^3+4
I=0.19*10
I=1.9
I=0.7A

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2)
radius=5m
acceleration=1200m^2
from a=v^2/r
v^2=9*r
v^2=1200*5
v^2=6000
v=sqr6000
v=77.46m/s

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3a)
A couple is a pair of forces, equal in magnitude, oppositely directed, and displaced by perpendicular distance or moment.

3b)
i)The forces exerted by one's hand on a screw-driver
ii)The forces exerted by the tip of a screw-driver on the head of a screw

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7a)
critical angle is the angle of incidence beyond which rays of light passing
through a denser medium to the
surface of a less dense medium
are no longer refracted but totally
reflected.

7b)
-Light travels as transverse waves and can travel through a vacuum.
-Sound travels as longitudinal waves and needs to travel through a solid, liquid or gas.

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8a)
i)wrapping the coil around an iron core.
ii)adding more turns to the coil.
iii)increasing the current flowing through the coil.

8b)
i)plate area
ii)Plate spacing
iii)Dielectic material

10a)
Tabulate
-Solids
i)they dont move around
ii)they are rigid and dont flow
-Liquids
i)liquids slosh around
ii)the maintain the shape of their container

10b)
diffusion

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NOW TYPING..
MORE ANSWERS COMING..
KEEP REFRESHING STEADY

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PLEASE NOTE: WE ONLY CATER FOR ANSWERS BEFORE THE EXAM ON IMPORTANT SUBJECTS.

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