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WorksheetsElectric Forces and Charges
Total questions: 14
Worksheet time: 30mins
In order to create an electric charge, what type of particle must be added or removed from an object?
proton
electron
neutron
alpha particle
A balloon has a negative charge. A glass rod has a positive charge. What will happen when the rod is brought near the balloon?
the balloon will be attracted to the rod
the balloon will remain in place
the balloon will be repelled by the rod
the balloon will spin in circles
Two charges are near each other. The magnitude of both charges is doubled. By what factor will the Coulomb force change?
2
4
1/2
1/4
If the distance between two charges triples, by what factor will the force between them change?
3
9
1/3
1/9
What is the magnitude of the electric force between two charges of 1.0C separated by a distance of 1.0m?
9.0x10^9 N
1.1x10^10 N
9.0x10^19 N
1.1x10^-10 N
As shown in the figure, the charge Q is midway between two other charges. If Q= -7.5 nC what must be the charge q1 so that charge q2 remains stationary as Q and q1 are held in place?
30 nC
15nC
7.5nC
60nC
Two small hollow metal spheres hung on insulating threads attract one another as shown. It is known that a positively charged rod will attract sphere A. Which statements can be correctly concluded about the charge on the spheres?
A has a positive charge
B has a negative charge
A and B have opposite charges
A is neutral
As shown above, two particles, each of charge +Q, are fixed at opposite corners of a square that lies in the plane of the page. A positive test charge +q is placed at a third corner. What is the direction of the net force on the test charge due to the other two charges?
