[2019 NECO GCE] Correct 2019 NECO GCE PHYSICS Paper I (Alternative to Practical Work) Questions And Answers Now Posted Here

[2019 NECO GCE] Confirmed real and Verified 2019 NECO GCE – Correct
PHYSICS Paper I (Alternative to Practical Work) Questions And Answers Now Posted Here

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Tuesday, 25th November, 2019

PHYSICS Paper I (Alternative to Practical Work) –

2PM – 4.45pm

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Solutions Now Available Here…..

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PHYSICS Paper I ( Practical Work) SOLUTIONS

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“` ….**** SOLUTIONS****

1ai -1aiv)
S/N|M(g)|Real values of b(cm)|Converted values of b(cm)| Real Value of d(cm)| Converted values of d(cm)| N = b/d
1 |20 |5.30|26.50|12.9|64.5|0.41|
2 |40 |8.0 |40.0 |10 |50.0|0.80|
3 |60 |9.9 |49.5 |8.3|41.5|1.20|
4 |80 |11.0|55.0 |7.0|35.0|1.50|
5 |100|12.1|60.5 |6.0|30.0|2.0|

(1avi)
Slope = Y2-Y1/X2-X1
=70-20/1.4-0.4
= 50/1
=50g

(1avi)
(i) I avoid error due to parallel when taking all my reading
(ii) I made sure that the meter rule beconect horizontally before taking my reading

(1bi)
(i) The total upward force must balance the downword.
(ii) The algebraic sum of all forces act on the body must be equal to zero.
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3ai -3aiv)
S/N|R(ohms)|V(v)|I(A)|1/v(A/v)|R-¹(ohm-¹)|
1 | 1.0|1.21|1.80|1.49|1.00
2 | 2.0|1.50|1.50|1.00|0.50
3 | 3.0|1.64|1.36|0.83|0.33
4 | 4.0|1.72|1.29|0.75|0.25
5 | 5.0|1.76|1.23|0.70|0.20

(3av)
PLOT THE GRAPH

(3avi)
Slope = ΔA/V / ΔR-¹
= 1.28 – 0.80/ 0.80 – 0.30
= 0.48/0.50
= 0.96

Intercept (c) = 0.50

(3avii)
(i) I would ensure I made tight connection before taking my reading.
(ii) I would ensure I noted zero error on the voltmeter and Ammeter

(3bi)
Potential difference is the work done in moving a unit charge from a point in electric field to another. It has the unit of Volt.
V = work done/charge

(3bii)
r = 0.5ohms
I = 1.2A
R = ?
E = 3v
E = I(R+r)
E = IR + Ir
E – Ir = IR
R = E – Ir/I
= 3 – 1.2 × 0.5/1 .2
= 3 – 0.6/1.2
R = 2.4/1.2
R = 2 ohms

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