Resistors of 10, 15 and 5 ohms are all connected in SERIES to a 90 V source of potential difference. Calculate the TOTAL EQUIVALENT RESISTANCE of the circuit, the TOTAL CURRENT in the circuit, and the POTENTIAL DROP across each resistor.

Three resistors of resistances 4.0 Ω, 6.0 Ω, and 10 Ω are connected in parallel. If this combination is now connected in series with an ideal 12-V battery and a 2.0-Ω resistor, what is the current through the 10-Ω resistor?

The power dissipated by a light bulb’s resistor is proportional to how bright the light bulb glows.  The lightbulb’s wattage is defined assuming it has a fixed resistance and is connected to a voltage source of 110 V.  Two 110-V light bulbs, one “25 W” and the other “100 W”, are connected in series to a 110-V source. Which statement below is correct? The current in the 100-W bulb is greater than that in the 25-W bulb. The current in the 100-W bulb is less than that in the 25-W bulb. Each bulb will have a potential difference of 55 V. The 100-W bulb lights dimmer than the 25-W bulb none of the answers

Some light bulbs are connected in parallel to a 120 V source. Each bulb dissipates an average power of 60 W. The circuit has a fuse F that burns out when the current in the circuit exceeds 9 A. Determine the largest number of bulbs, which can be used in this circuit without burning out the fuse.