Electric Circuits
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 resistor with a resistance of 10 has a current of 3 A flowing through it. What is the power dissipated by the resistor?
A complex circuit has an equivalent resistance of 5 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?
Two lightbulbs are connected in series to a 12 V battery. Lightbulb A has a resistance of 6 , and lightbulb B has a resistance of 12 . Which lightbulb will be brighter?
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 hair dryer is rated at 1500 W when plugged into a 120 V outlet. What is the current drawn by the hair dryer?
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A heating element in a toaster dissipates 900 W of power when connected to a 120 V supply. What is the resistance of the heating element?
A high-voltage power line carries 1000 A at 500,000 V. What is the power transmitted?
A lightbulb has a resistance of 240 and is connected to a 120 V source. What is the power dissipated by the lightbulb?