Two lightbulbs both operate on 120 V. One has a power of 25 W and the other 100 W. Which lightbulb has higher resistance?
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- A car battery causes a current of 3.75 A through a car head-lamp and produces 12 V across it. What is the power used by the lamp?A 10 N component is connected to a 12 V battery. How much energy is expended per second?Your laptop has a power rating of 100 W. If your laptop represents a resistance of 1.91 kQ, what is the maximum current that your laptop can handle?
- An amplifier in a portable speaker is connected to a 15 V battery and has a resistance of 8.0 Ω.What is the power used by the amplifier?An idealized voltmeter is connected across the terminals of a 15.5 V battery, and a 71.0 Ω appliance is also connected across its terminals. If the voltmeter reads 10.6 V. How much power is being dissipated by the appliance? What is the internal resistance of the battery?1002 V100 202 ww ww R1002 R200 V20 R50 50 1100 I20 V5 V2 = 4 volts V = 9 volts