# WAEC GCE Physics Practical Questions and Answers – 2019 Second Series Expo

West Africa Examination Council, WAEC GCE Physics Practical Questions and Answers for 2019 Second Series WAEC GCE Examination is now available, Always subscribe to get the questions and already solved answers by Examrelief earlier. # 👑 2019 WAEC GCE PHYSICS PRATICAL ANSWERS👑

(1)
(i)|Xraw|Yraw| Xreal |Yreal
1 |4.9.| 5.3| 9.8| 10.6
2 |6.7 | 5.9|13.4|11.8
3 |8.3 | 9.7|16.6|19.4
4 |10.0|11.7|20.0| 23.4
5 |11.3|13.4|22.6|26.8
6 |12.7|15.0|25.4|30.0

(1aiv)

(1av)
Slope(s) => change in Y/Change in X => Y2 – Y1/X2 – X1
=>26.8 – 10.6/22.6 – 9.8 = 16.2/12.8
S = 1.266

(1avi)
If S = 1.266
Then K = 1/1.266 = 0.790

(1avii)
(i) I would ensure that the reading was taking from the meniscus level before taking my reading.
(ii) I would have ensured that the tubes are vertically upright before carrying out the experiment for accuracy.

(1bi)
Pressure: It is the force applied per unit area. It is measured in N/m². Pressure = Force/Area

(1bii)
Relative density of E = Y/X = 15/10 = 1.5
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(2)
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(3)
(i)|Ri |OP(cm)|xi(cm)|X-¹|R-¹
1 |2.0| 3.70|18.50|0.054|0.500
2 |4.0| 4.30|21.50|0.047|0.250
3 |6.0| 5.00|25.00|0.040|0.167
4 |8.0| 5.40|27.00|0.037|0.125
5 |10.0|5.70|28.50|0.035|0.100

(3avi)
Slope s = ΔX-¹/ΔR-¹
=(50 – 30)×10-³/0.29 – 0.04
=20 ×10-³/0.25 = 0.02/0.25
= 0.08

Intercept, C = 26.5×10-³ = 0.0265

(3avii)
k1 = 1/C = 1/0.0265 = 37.74
K2 = 5/C = 0.08/0.0265 = 3.02

(3aviii)
(i) I would ensure right connections.
(ii) I would ensure clean terminals.

(3bi)
(i) Higher accuracy.
(ii) No errors in reading associated with the use of a Pointer in a voltmeter.

(3bii)
E1 = E2
L1 = L2
E2L1 = E1L2

Where
E1 = 1v
E2 = ?
L1 = 50cm
L2 = 72cm
50E2 = 72
E2 = 72/50
E2 = 1.44v

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