What is the force between two 1.5x10^-5C charges separated by 2.0m?

Two charged spheres are 20 cm apart and exert an attractive force of 4 x 10^-9 N on each other. What will the force of attraction be when the spheres are moved to 10 cm apart?

What is needed in order to create a magnetic field?

A material is most likely an insulator if the relative strength of the force attracting valence electrons to the nucleus of the atoms in the material is ―

A student connects a length of unknown material in series with a battery and an ammeter (which measures current flow). When the circuit is complete, the ammeter reads that no current is flowing. The unknown material is most likely ―

Silicon is a substance often used in electronic devices. Silicon has a high electrical resistance compared to metals which means that it does not release its electrons very easily. However, it does conduct electricity when the right conditions are met. These properties allow electronic devices to control the electrical current sent through silicon much easier than a typical metal substance. The properties of silicon would cause it to best be classified as a —

A superconductor has a critical temperature below which ―

Which of the following, on average, has the highest electrical resistance value?

A cell phone company is trying to improve their chargers so that the battery charges faster. Based on the information above, which material would be the best to use when making

the cell phone charger cable?

According to the diagram, what is the equivalent resistance of the circuit?

What is the current leaving the battery?

The newest generation of smart phone uses three different batteries connected in a series simultaneously to extend battery life and generate the energy necessary to power the device. If each battery is rated at 2.4 V, what is the overall voltage provided to the phone?

A single 12.0 V battery is connected in series with two identical 10 Ω resistors. What is the current moving through the first resistor?

A 20A fuse is connected in series with a circuit containing a 240 V source. What is the minimum resistance required to prevent the fuse from melting?

A student examining a flashlight observes that it uses a traditional incandescent light bulb. The power rating of the bulb is 60 W, and the bulb is connected to 36 V.

What is the current moving through the bulb?

What is the total electrical energy used by a 9 V battery when connected to a 15 Ω resistor for 25 seconds?

Which of the following must be the same for both resistors R1 and R2?

One light bulb in the kitchen burns out and suddenly several lights go out in the house. This would provide evidence that the bulbs were wired in —

An average 1.50 V Alkaline AA battery has 9,360 J of stored energy. If the battery is placed in a toy that requires 2.00 amperes of current to operate, how many minutes will the battery last before it runs out of energy?

A student creates a parallel circuit that has three branches. The student places a resistor on each branch of the circuit so that each path has only one resistor. The student collected some of the electrical measurements in the circuit and recorded them in a data table. Based on the information in the table, which values should replace the A, B, and C in the Student Circuit Data table?

Find the total resistance of the circuit shown in the picture.

The current supplied by the battery for the circuit is 0.17 amps. Based on the circuit shown above, what is the potential difference across the 20.0 ohm resistor?

If the battery is 5.0 volts, what is the power dissipated by the circuit in the graphic?