PHYSICS PRACTICAL (ALT. A) 9.30AM � 12.15PM (1bi) Moment of a force about a point is the product of the force and its perpendicular distance from the point to the line of action of the force. i.e moment=force*time and its unit is Nm (1bii) -Sum of forces acting in one direction must equal to the forces acting in another direction. -The algebraic sum of moment acting about a point must be equal to zero (1i) Centre of gravity =50.5 TABULATE S/N|A(cm)| B(cm) 1 |10.0 | 51.90 2 |15.0 | 53.50 3 |20.0 | 53.80 4 |25.0 | 54.90 5 |30.0 | 55.80 (1xii) -I avoided the effect of draught during the experiment -I avoided error due to parallax on the metre rule -I balanced the metre rule horizontally on the knife edge beforehand taking my readings (3a) TABULATE S/N|E(v)|V(v)|I(A)|V^-1(v^-1)|I^-1(A^-1) 1 |1.50|0.80|0.40| 1.250 |2.500 2 |3.00|1.40|0.70| 0.714 |1.429 3 |4.50|2.00|1.00| 0.500 |1.000 4 |6.00|2.50|1.20| 0.400 |0.833 5 |7.50|3.20|1.50| 0.313 |0.667 Precautions: -I tightened all the wires tightly together -I ensured clean terminals -I avoided zero error on the ammeter used (3bi) -By using electric cells -By using electrostatic method (3bii) For parallel connection=1/R=1/R+1/R 2Rt=R Rt=R/2ohm Total=(R/2)+2 4=(R/2)+2 4=(R+4)/2 8=R+4 8-4=R R=4ohm ........................................................................................... ANSWERS LOADING... Typing... Give us time PLS STAY ONLINE AND KEEP REFRESHING THE PAGE AS WE WORK ON IT.. Thanks. :::::::::::=======::::::::::====== ANSWERS LOADING...