Question

Question 1: (Total 25 marks. Each question is worth 5 marks each) For each of the statements below, indicate whether the statement is true or false and explain your reasoning A. Object A with a net charge of +5C is placed 1 cm away from Object B with a net charge of +8C. When Object A is moved a further 2 cm away from Object B, the size of the force between the two objects will increase. B. Two balloons A and B contain Gas X. Balloon A has a higher pressure than Balloon B. When Balloon A and Balloon B are interconnected, some of Gas X will flow from Balloon A into Balloon B. C. The purpose of the ground prong of the plug for an electrical appliance is to complete the normal circuit path for low potential charges. Heat transfer between two objects occurs only when the objects are touching one another. An object's kinetic energy can be changed by altering its position in any direction D. E.

Answer 1

A.The size of the force will decrease since by Coulomb's law the electric force between 2 charges is inversely proportional to the square of the distance between them. The answer is false.

B.This is true since gas flows from a region of higher pressure to a region of lower pressure.

C.This is false as the purpose of the ground plug is to complete the circuit path for high potential charges.

D.False as by the mechanism of radiation also heat can be transferred between 2 objects.

E.False as the kinetic energy of an object depends on velocity and not on position.