Neco 2021 Physics Practical Questions and Answers

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2021 NECO PHYSICS-PRACTICAL

(1)

Tabulate

reading- 1,2,3,4,5

masses(m)- 50,53,55,58,60
depth(d)-5.50,5.80.6.00,6.30,6.60
ti(s)- 6.45,6.80,6.85,7.40,7.45
T=t/n(s)- 0.655,0.680,0.685,0.740,0.758
T^2(s^2)- 0.429,0.462,0.469,0.548,0.575
Li(g/cm)- 5.455,5.776,5.833,6.032,6.154
Mli(g)-30.0,33.5,35.0,38.0,40.0

1aix)
i)I avoided parallax error in reading clock/weight balance
ii)I ensue repeated readings are taken to avoid random error

1bi)
i)weight
ii)upthrust
iii)viscous force/drag or liquid friction

1bii)
The amplitude of oscillation of the loaded test tube decreases with time because of the viscous drag(force) which opposes the motion.

(1xii)
(i)i avoided draught.
(ii)i avoided error due to parallax when reading the meter rule.
(iii) I ensured steady oscillation.
(iv) I avoided zero error to the stop clock.
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3)

Table W1
s/n-1,2,3,4,5,6
xn(cm)/d1=0.009m- 3.06,3.50,3.70,4.30,4.50,4.80
xm(cm)converted/- 15.30,16.50,18.50,21.50,22.50,24.40
xm(cm)converted d2=0.005m- 84.70,83.50,81.50,78.50,77.50,75.60
Ri(n)- 11.07,10.12,8.81,7.30,6.89,620

Tabulate W2
s/n-1,2,3,4,5,6
xmi(cm)- 1.40,1.65,1.80,2.20,2.55,2.94
converted/xmi(cm)7.00,8.25,9.00,11.00,12.75,14.70
xni(cm)- 93.00,91.75,91.00,89.00,87.25,85.3
R2i(n)- 26.57,22.24,20.22,16.18,13.69,11.61
slope
dy/dx=26.57-13.69/11.07-6.89
=12.88/4.18
=3.08

3ix)
k=d2/d1*squareroot5
=0.005/0.009*squareroot13.08
=0.56*1.75
=0.98

3x)
i)i would ensure that the terminal are well tightened to avoid partial contact
ii)i would obey the conect connection of positive to positive to negetive to negetive when connecting to circuit

3bi)
when temperature increases the molecules tends to vibrate more intense there by opposing the flow of current

3bii)
P=I^R
P=V^2/R
power=1000W
Voltage=200V
R=?
1000=200^2/R
R=40000/1000
R=40

(3xi)
(i)I ensured tightened connections.
(ii) I avoided error due to parallax on the ammeter.
(iii) I removed key when reading was not taken
(iv) Avoidance of repeated reading from table
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CHOOSE ANY PERFECT TWO FROM EACH

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2021 NECO PHYSICS-PRACTICAL

(1xii)
(i)i avoided draught.
(ii)i avoided error due to parallax when reading the meter rule.
(iii) I ensured steady oscillation.
(iv) I avoided zero error to the stop clock.
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(3xi)
(i)I ensured tightened connections.
(ii) I avoided error due to parallax on the ammeter.
(iii) I removed key when reading was not taken
(iv) Avoidance of repeated reading from table
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CHOOSE ANY PERFECT TWO FROM EACH

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(1xii)
(i)i avoided drought by closing the window
(ii)i avoided error due to parallax when reading the meter rule
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(3xi)
(i)I ensured tight connections
(ii) I avoided error due to parallax on the ammeter
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1. Thermodynamics, science of the relationship between heat, work, temperature, and energy. In broad terms,thermodynamics deals with the transfer of energy from one place to another and from one form to another.
2. THERMO DYNAMIC SYSTEM: A system is defined as a region in space containing a quantity of matter whose behaviour is being investigated. This quantity of matter is separated from its surroundings by boundary, such as they walls of a vessel.
(3a)
(xii)
(i)I ensured tight connections on all terminals
(ii) I avoided error due to parallax on the ammeter

(3bi)Period refers to the amount of time it takes a wave to complete one full cycle of oscillation or vibration. Frequency, on the contrary, refers to the number of complete cycles or oscillations occur per second. Period is a quantity related to time, whereas frequency is related to rate. Period simply refers to the time for something to occur periodically, whereas frequency means how often that happens.

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