2018/19 WASSCE/WAEC PHYSICS PRACTICAL ALTERNATIVE A ANSWERS BY COOLBOY

(1)

Tabulate:

s/n= 1,2,3,4,5

L(cm)= 130,110,90,70,50

T1(sec)= 45.70,42.00,38.00,33.10,28.70

T= 2.29,2.10,1.90,1.66,1,44

T^2= 5.22,4.41,3.61,2.74,2.06

L=100,80,60,40,20

(1)

-precautions-

Take Any Two

(i)I avoided conical oscillation 

(ii)I avoided drought

(iii)I avoided parallax error in taking reading from the metre rule

(iv)I avoided zero error in taking reading from the stop watch

MORE COMING...

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(3)

Tabulate:

(3)

-precautions-

Choose any two

(i)I removed key when reading is not taking

(ii)I ensured tight connections at the terminals

(iii)I avoided parallax error when taking reading from the ammeter.

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SOLVING AND TYPING...

3)

TABULATE

s / n 1 , 2 , 3 , 4 , 5

D (cm) 25, 35 , 50, 65, 80

I (A) 1 . 99, 1 . 75, 1 . 55, 1 . 44, 1 . 36

I ^ (A^ - 1) 0 . 530 , 0 . 571 , 0 . 645 , 0 . 694 , 0 . 735

Lo ( j ^) - 0 . 2984 , - 0 . 2434 , - 0 . 1904 , - 0 . 1586 , - 0 . 1337

3)

- precautions -

take any two

i) I removed key when reading is not taking

ii) I ensured tight connections at the terminals

iii) I avoided parallax error when taking reading from the ammeter.

3bii)

i) length - longer wires have greater resistance.

ii) thickness - smaller diameter wires have greater resistance.