Electric Circuits

A complex circuit has an equivalent resistance of 5 $\Omega$ and is connected to a 20 V voltage source. What is the power dissipated by the entire circuit?

Two lightbulbs are rated at 40 W and 60 W, respectively. Both are designed to operate at 120 V. Which lightbulb will be brighter when connected to a 120 V source?

A hair dryer is rated at 1500 W when plugged into a 120 V outlet. What is the current drawn by the hair dryer?

A high-voltage power line carries 1000 A at 500,000 V. What is the power transmitted?

A 20 $\Omega$ resistor and a 30 $\Omega$ resistor are connected in series to a 100 V source. What is the power dissipated by the 20 $\Omega$ resistor?

A 10 $\Omega$ resistor and a 20 $\Omega$ resistor are connected in parallel to a 10 V source. What is the total power dissipated by the circuit?

A circuit element has a voltage drop of 12 V across it when a current of 2 A flows through it. What is the power dissipated by the element?

A lightbulb has a resistance of 240 $\Omega$ and is connected to a 120 V source. What is the power dissipated by the lightbulb?

In a complex circuit with multiple lightbulbs and resistors, the relative brightness of each bulb needs to be determined. Factors such as internal resistance and non-ideal voltage sources should be considered. If Bulb 1 has twice the resistance and half the current of Bulb 2, how do their brightnesses compare?

A resistor with a resistance of 10 $\Omega$ has a current of 3 A flowing through it. What is the power dissipated by the resistor?