EXAMIANS
You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?
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If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is
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The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately
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What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?
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What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?
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How much voltage is needed to produce 2.5 A of current through a 200 resistor?
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A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.
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When 12 V are applied across a 68 resistor, the current is
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An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately
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A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver?
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