As the distance between two point charges is tripled, the electrostatic force between the charges
increases by a factor of nine
decreases to one-ninth the original force
decreases to one-third the original force
increases by a factor of three
The diagram given shows two metal spheres suspended by strings and separated by a distance of 3.0 meters. The charge on sphere A is +5.0 X 10-4 coulomb and the charge on sphere B is +3.0 x 10-5 coulomb. Which statement best describes the electrical force between the spheres?
It has a magnitude of 45 N and is repulsive.
It has a magnitude of 45 N and is attractive.
It has a magnitude of 15 N and is repulsive.
It has a magnitude of 15 N and is attractive.
The diagram represents two charges q1 and q2, separated by distance d. Which change would produce the greatest increase in the electrical force between the two charges?
doubling d and charges q1 and q2
doubling d only
doubling d and charge q1 only
doubling charge q1 only
What is the magnitude of the electrostatic force between a charge of +3.0 x 10-5 coulomb and a charge of +6.0 x 10-6 coulomb separated by 0.30 meter?
5.4 N
1.8 x 10-3 N
5.4 x 10-2 N
18 N
What is the relationship between I1 and I2?
4I1 = I2
I1 = 2I2
2I1 = I2
I1 = 4I2
The diagram represents a DC circuit.
What is the total resistance of the circuit?
39 ohm
58 ohm
25 ohm
28 ohm
A simple circuit has a current of 3.0 A and a resistance of 5.0 ohm . What is the voltage supplied by the battery of this circuit?
1.7 V
8.0 V
15.0 V
0.60 V
Two metal spheres, A and B, possess charges of 1.0 microcoulomb and 2.0 microcoulombs, respectively. In the diagram below, arrow F represents the electrostatic force exerted on sphere B by sphere A.
Which arrow represents the magnitude and direction of the electrostatic force exerted on sphere A by sphere B?
In this circuit, what is the current through the 2-ohm resistor?
0.8 A
8.0 A
5.0 A
0.2 A
Which set of resistors has the smallest equivalent resistance?