2020 WAEC PHYSICS PRACTICAL QUESTIONS/ANSWERS VERIFIED EXPO

(2)

(1)

(1)

Graph!.

(1)

S|N; 1|2|3|4|5|

M(g); 40.0|60.0|80.0|100.0|120.0|

X(cm);37.50|25.01|8.75|15.00|12.50|

X-¹(cm-¹); 0.027| 0.040|0.|053|0.067|0.08|

X-¹(x10-³); 27.00|40.00|53.00|67.00|80.00|

G=50.0cm

Y=30.0cm

Slope =∆M/∆X^-1= M2-M1/(X^-1) – (X^-1)

S= 120.0 -40/80.0-27

S= 80/53

S=1.509*10^3

S=1509

(x)

S=ymo

1509=30mo

mo=1509/30

mo=50.3

(1xi)

(i)Measure readings accurately

(ii)Avoid error due to parallax

(1bii)

CWM = ACWM

60*25 = x *30

30x = 1500

Divide through by 30

30x/30 = 1500/30

x=50g

The mass that should be placed at the 80cm mark of the meter rule to balance it horizontally is 50g

(1bi)

Moment of a force can be defined as the product of the force and its perpendicular distance from its point of action.

(1bii)

(1bii)

CWM = ACWM

60*25 = x *30

30x = 1500

Divide through by 30

30x/30 = 1500/30

x=50g

The mass that should be placed at the 80cm mark of the meter rule to balance it horizontally is 50g

(1bi)

Moment of a force can be defined as the product of the force and its perpendicular distance from its point of action.

=======================

Graph 

(3a)

(3a)

(i)E=3.00v

Tabulate.

R(n); 1.0|2.0|4.0|6.0|8.0

I(A)0.40|0.35|0.28|0.22|0.18|

V(v)0.65|0.58|0.50|0 45|0.40|

(3bi)

(i) I avoided error due to parallax when reading the ammeter and voltmeter

(ii)I ensure tight connection.

(3bi)

(i)it increase current supplied

(ii)it makes up for any detect on any cells

(3bii)

(i)The length of the resistor.

(ii)The thickness of the resistor.

Posted by admin on 18th August 2020.

Tags: 2021 WAEC PHYSICS PRACTICAL QUESTIONS/ANSWERS VERIFIED EXPO, WAEC PHYSICS PRACTICAL QUESTIONS/ANSWERS VERIFIED EXPO

Categories: WAEC