Apositively charged insulating rod is brought close to an object that is suspended by a string. if the object is attracted toward the rod we can conclude:

a. the object is positively charged
b. the object is negatively charged
c. the object is an insulator
d. the object is a conductor
e. none of the above

Option (b) is the correct answer.

Explanation:

It is known that opposite charges tend to attract each other whereas like charges tend to repel each other.

For example, when a positively charged insulating rod is brought close to an object and the object gets attracted towards the rod then it means that a negative charge is present on the object.

This is because both the object and rod gets attracted towards each other and only opposite charges tends to attract each other.

Thus, we can conclude that if the given object is attracted toward the rod we can conclude that the object is negatively charged.

there are no correct statementd on the list of choices you provided.

the higher the current the higher the mag field around it the higher the influence on the compass