NECO PHYSICS PRACTICAL ANSWERS 2020

NECO PHYSICS PRACTICAL ANSWERS 2020

Here is the physics practical answers for neco as promised, make sure toplot the graphs well… remember to share using the share button, good luck.

(1)


Tabulate.
S/N; 1|2|3|4|5|

M|g; 40.0|35.00|30.00|25.00|20.00|

θ°; 41.80|35.70|30.00|24.60|19.47|

ϕ=(90-θ°); 48.20|54.30|60.00|65.40|70.53|

Cosϕ; 0.6665|0.5835|0.5000|0.4163|0.3333|

(1xi)
Slope , S=Δm|g/ΔCosϕ
=(40-20)g/0.6665-0.3333
S= 20g/0.3332=60.024g

(1xii)
K=s/2 =60.024g/g= 30.012g

(1xiii)
-Precautions-
(i) I avoided error due to parallax when reading from the protector
(ii) I ensured that the force board is firmly and correctly clamped to the retort stand

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(1)
Graph


1bi)
(i)The have the same magnitude/size
(ii)They can be obtained/calculated by the same means

(1bii)


(1bii)
T²= 9²+12²
T= √81+144
T= √225
T= 15N

(3)
Tabulate
S/N; 1|2|3|4|5|

R/Ω; 2.00|4.00|6.00|8.00|10.00|

L/cm; 50.00|66.70|75.00|80.00|83.30|

B/Ω^-¹; 0.500|0.250|0.167|0.125|0.100|

Δ/cm; 1.000|0.499|0.333|0.250|0.200|

(3xiii)
Slope ,S=ΔB/Ω^-¹/ΔΔ/cm =0.5-0.1/1.0-0.2=0.4/0.8=0.5
Slope =0.5Ω^-¹/cm

(3xiv)
K=S^-¹= 1/5=1/0.5Ω^-¹/cm =2Ωcm

(3xv)
-precautions-
(i) I avoided error due to parallax when reading from the potentiometer
(ii) I ensured that the wire are tightly connected.

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(3)
Graph


(3bi)
(i) potentiometer give exact value of potential difference while voltmeter draws apart of the current
(ii) potentiometer can be used for measuring the internal resistance of a cell which cannot be done with voltmeter

(3bii)
x/R= c/100-c
x/R= 20-0/100-20
x/20= 20/80
x= 20*20/80
x= 400/80
x= 5Ω

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6 thoughts on “NECO PHYSICS PRACTICAL ANSWERS 2020”

  • 09027244726 WhatsApp linkup so that in future I will reward you… Thanks alot sir for your help I heard that you lost your phone…sorry pls continue the good work.God bless you

    Reply
  • Thanks alot

    Reply
  • Keep up sir u are good

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