A 220 Ω resistor dissipates 3 W. The voltage is
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Electrical Engineering · all questionsEnergy And Power
Energy And Power
practice.
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If you used 400 W of power for 30 h, you have used
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For 12 V and 40 mA, the power is
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How many watt-hours represent 65 W used for 18 h?
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Energy equals power multiplied by time.
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Watt's law states the relationships of power to energy.
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A 3.3 kΩ resistor dissipates 0.25 W. The current is
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A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is
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How much continuous current can be drawn from a 60 Ah battery for 14 h?
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At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?
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A 6 V battery is connected to a 300 Ω load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?
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The capacity of a battery is measured in milli-amperes.
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A 15 V source is connected across a 12 Ω resistor. How much energy is used in three minutes?
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If it takes 400 ms to use 12,000 J of energy, the power is
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A 120 Ω resistor must carry a maximum current of 25 mA. Its rating should be at least
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A half-watt is equal to how many milliwatts?
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In 40 kW, there are
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The joule is a unit of energy.
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Energy is equal to power multiplied by voltage.
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A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is
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